Complete catalogue
All 982 tools
Search or scan the complete browser-tool collection.
982 tools
Astrology 8
Biorhythm Calculator
Biorhythm calculator: chart your physical, emotional and intellectual cycles for any date from your birth date. Free, private, runs locally, no signup.
Open calculatorCalculatorChinese Zodiac Calculator
Chinese zodiac calculator: find your animal sign AND element from your birth year, with traits, lucky numbers, and compatibility. Free, instant, private.
Open calculatorCalculatorMercury Retrograde Calculator
Mercury retrograde calculator: find every Mercury retrograde start, end, and shadow period for any year, with exact dates. Free, runs in your browser.
Open calculatorCalculatorNumerology Life Path Calculator
Numerology life path calculator: reduce your birth date to your life path number with its meaning and traits. Free, runs locally in your browser, no signup.
Open calculatorCalculatorNumerology Name Number Calculator
Numerology name number calculator: convert any full name to its destiny number using Pythagorean letter values. Free, runs locally in your browser, no signup.
Open calculatorCalculatorZodiac Compatibility Calculator
Zodiac compatibility calculator: score any two signs on love, communication, and long-term fit, with strengths and friction points. Free, private, no signup.
Open calculatorCalculatorZodiac Element Calculator
Zodiac element calculator: find your sign's element, modality and best compatibility matches from your birth date. Free, private, runs locally, no signup.
Open calculatorCalculatorZodiac Sign Calculator
Zodiac sign calculator: enter your birthday to get your sun sign, element, ruling planet, and date range instantly. Free, runs in your browser, no signup.
Open calculatorAstronomy 8
Distance Modulus Calculator
Distance modulus calculator: convert magnitude difference m minus M into distance in parsecs or light years. Free, editable units, runs in your browser.
Open calculatorCalculatorLight Year Distance Calculator
Light year distance calculator: convert light years to miles, km, and AU, and see travel times at light speed instantly. Free, runs in your browser, no signup.
Open calculatorCalculatorMoon Phase Calculator
Moon phase calculator: current moon phase from the synodic cycle. Free moon phase calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorOrbital Period Calculator
Orbital period calculator: derive a satellite or planet's orbital period from semi-major axis and body mass using Kepler's third law. Free, no signup.
Open calculatorCalculatorPlanetary Weight Calculator
Planetary weight calculator: convert your Earth weight to what you would weigh on every planet and major moon by surface gravity. Free, browser, no signup.
Open calculatorCalculatorStar Magnitude Calculator
Star magnitude calculator: convert between apparent and absolute magnitude using distance, or compare two stars' brightness ratio instantly. Free, no signup.
Open calculatorCalculatorStellar Temperature Calculator
Stellar temperature calculator: estimate a star's surface temperature and spectral class from its color index. Free, private, runs locally, no signup.
Open calculatorCalculatorTelescope Magnification Calculator
Telescope magnification calculator: find eyepiece magnification and true field of view from telescope and eyepiece focal lengths. Free, runs locally, no signup.
Open calculatorBiology 7
Blood Type Inheritance Calculator
Blood type inheritance calculator: predict possible child blood types from parent ABO and Rh factor groups in seconds. Free, private, runs locally, no signup.
Open calculatorCalculatorChargaff Rule Calculator
Chargaff rule calculator: verify A=T and G=C base pairing rules from DNA composition and find missing base percentages. Free, private, runs locally offline.
Open calculatorCalculatorDNA GC Content Calculator
DNA GC content calculator: instantly compute the GC percentage of any DNA or RNA sequence from its base composition, in your browser. Free, private, no signup.
Open calculatorCalculatorDoubling Time Calculator
Doubling time calculator: find how long an investment or population takes to double from any compounding growth rate. Free, editable rates, runs locally.
Open calculatorCalculatorHardy Weinberg Calculator
Hardy Weinberg calculator: compute allele and genotype frequencies p, q, p2, 2pq, and q2 from dominant phenotype counts. Free, runs in your browser offline.
Open calculatorCalculatorProtein Molecular Weight Calculator
Protein molecular weight calculator: estimate a protein's approximate mass in kilodaltons from amino acid chain length. Free, runs in your browser, no signup.
Open calculatorCalculatorPunnett Square Calculator
Punnett square calculator: build genetic crosses for 1 to 5 gene traits and see genotype and phenotype ratios instantly. Free, runs locally, no signup.
Open calculatorChemistry 21
Average Atomic Mass Calculator
Average atomic mass calculator: compute the weighted atomic mass of an element from its isotopes' masses and natural abundances. Free, runs in your browser.
Open calculatorCalculatorBuffer Solution Calculator
Buffer solution calculator: use the Henderson-Hasselbalch equation to find buffer pH from pKa and acid to conjugate base ratio. Free, private, runs locally.
Open calculatorCalculatorC1V1 = C2V2 Calculator
C1V1 = C2V2 calculator: solve the dilution equation for any missing concentration or volume when mixing stock solutions. Free, private, runs in your browser.
Open calculatorCalculatorDilution Calculator (C1V1=C2V2)
Dilution calculator: solve C1V1 = C2V2 for stock volume, final volume, or final concentration when preparing lab dilutions from a stock solution. Free, no signup.
Open calculatorCalculatorElectron Configuration Calculator
Electron configuration calculator: write full and noble gas orbital configurations plus valence electrons for any element. Free, private, runs locally, no signup.
Open calculatorCalculatorEmpirical Formula Calculator
Empirical formula calculator: convert percent composition into mole ratios and the simplest whole-number empirical formula step by step. Free, no signup.
Open calculatorCalculatorEquilibrium Constant Calculator
Equilibrium constant calculator: compute Kc from equilibrium concentrations or solve for a missing concentration in a reaction. Editable, free, runs locally.
Open calculatorCalculatorGas Laws Calculator
Gas laws calculator: solve ideal gas and combined gas problems for pressure, volume, temperature, or moles of a gas. Free, runs in your browser, no signup.
Open calculatorCalculatorLimiting Reagent Calculator
Limiting reagent calculator: identify the limiting reactant and theoretical yield from moles and a balanced equation. Free, private, runs locally, no signup.
Open calculatorCalculatorMolar Mass Calculator
Molar mass calculator: compute molecular weight from any chemical formula using standard atomic weights, with a per-element mass breakdown. Free, no signup.
Open calculatorCalculatorMolarity Calculator
Calculate molarity from moles and volume, with solution prep details. Free molarity with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorMolarity from Mass Calculator
Molarity from mass calculator: convert grams of solute and molar mass into molar concentration in seconds. Free, editable units, runs locally in your browser.
Open calculatorCalculatorMole Calculator
Mole calculator: convert grams to moles from sample mass and molar mass for chemistry homework and labs. Free, formula shown, runs locally, no signup.
Open calculatorCalculatorPercent Solution Calculator
Percent solution calculator for w/v, v/v, and w/w concentrations: compute solute amount or solution strength instantly. Free, runs locally, no signup.
Open calculatorCalculatorPercent Yield Calculator
Percent yield calculator: compare actual and theoretical yield from a chemistry reaction to get percent yield and reaction efficiency. Free, no signup.
Open calculatorCalculatorReaction Rate Calculator
Reaction rate calculator: find average reaction rate from concentration change over time, or predict rates from kinetics data. Free, runs locally, no signup.
Open calculatorCalculatorSerial Dilution Calculator
Serial dilution calculator: work out dilution factor, tube concentrations, and transfer volumes step by step for lab work. Editable, free, runs locally.
Open calculatorCalculatorSignificant Figures Calculator
Significant figures calculator: round any number to your chosen sig figs with step-by-step counting rules shown. Free, runs locally in your browser, no signup.
Open calculatorCalculatorStoichiometry Calculator
Stoichiometry calculator: use mole ratios from a balanced equation to convert between reactant and product amounts in moles or grams. Free, runs in your browser.
Open calculatorCalculatorTitration Calculator
Titration calculator: find solution molarity from titrant volume and concentration, with equivalence point handling. Free, runs in your browser, no signup.
Open calculatorCalculatorpH Calculator
pH calculator: convert hydrogen ion concentration to pH and pOH, or convert pH back to concentration for acids and bases. Free, runs in your browser, no signup.
Open calculatorColors & Design 11
Background Text Color Calculator
Background text color calculator: pick text colors that pass WCAG AA and AAA contrast ratios against any background hex value you enter. Free, no signup.
Open calculatorCalculatorColor Difference Calculator
Color difference calculator: compare any two colors in Delta E and see whether the gap is visible to the human eye or passes QA tolerances. Free, no signup.
Open calculatorCalculatorColor Gradient Calculator
Color gradient calculator: generate smooth CSS linear gradients between two or more hex colors with midpoint shades and copy-ready code. Free, no signup.
Open calculatorCalculatorColor Mixer Calculator
Color mixer calculator: blend two or more hex colors, see the mixed result and its hex code, and copy it for design or CSS. Free, runs in your browser.
Open calculatorCalculatorColor Palette Generator
Color palette generator: build matching color sets from one base color with hex codes ready to copy for design and branding. Free, private, no signup.
Open calculatorCalculatorColor Tint Shade Calculator
Color tint and shade calculator: lighten or darken any hex color in precise, copyable steps for your palette. Free, editable values, runs locally, no signup.
Open calculatorCalculatorComplementary Color Finder
Complementary color finder: get the exact opposite hue instantly in HEX, RGB, and HSL for any color you enter. Free, runs locally in your browser, no signup.
Open calculatorCalculatorHex to CMYK Converter
Hex to CMYK converter: turn any hex color into CMYK values for print design, with instant preview and copyable codes. Free, runs in your browser, no signup.
Open calculatorCalculatorHex to HSL Converter
Hex to HSL converter: turn hex color codes into HSL hue, saturation, and lightness values instantly, with RGB output and live color preview. Free, no signup.
Open calculatorCalculatorLuminance Brightness Calculator
Luminance calculator: convert between candela per square meter, nits, foot-lamberts, and other brightness units instantly. Free, runs in your browser, no signup.
Open calculatorCalculatorRGB to Hex Converter
RGB to hex converter: turn RGB color values into hex codes instantly, with live preview and copy-ready output for CSS and design work. Free, no signup.
Open calculatorConstruction & Measurement 95
AC BTU Calculator
AC BTU calculator: size your air conditioner by room dimensions, ceiling height, sun exposure, and occupancy so you buy the right capacity. Free, runs locally.
Open calculatorCalculatorAsphalt Calculator
Asphalt calculator: estimate tons of asphalt or hot mix needed from your driveway or lot length, width, and depth for accurate paving orders. Free, no signup.
Open calculatorCalculatorBacksplash Calculator
Backsplash calculator: measure your kitchen wall area, add waste, and get tile count, boxes, and cost estimate. Free, no signup, runs in your browser.
Open calculatorCalculatorBaluster Spacing Calculator
Baluster spacing calculator: compute on-center spacing and exact gaps so balusters pass the 4-inch sphere code test. Editable widths, free, in your browser.
Open calculatorCalculatorBarbed Wire Fence Materials Calculator
Estimate barbed wire rolls, posts, and H-braces for a cattle or property-line fence run. Enter length, strands, and post spacing for an instant materials list.
Open calculatorCalculatorBaseboard Calculator
Baseboard calculator: work out linear feet of baseboard trim plus a waste allowance for any room layout. Free, runs locally in your browser, no signup.
Open calculatorCalculatorBathroom Remodel Cost Calculator
Estimate bathroom remodel cost by square footage and tier: economy refresh, mid-range, or premium. Regional labor multiplier included.
Open calculatorCalculatorBeam Load Calculator
Beam load calculator: compute bending moment, shear force, and reactions for beams under point and distributed loads. Free, runs in your browser, no signup.
Open calculatorCalculatorBoard Foot Calculator
Board foot calculator: convert lumber dimensions into board feet and total cost, multiple boards at once. Editable prices, free, runs in your browser.
Open calculatorCalculatorBreak-Even Cost per Bushel Calculator
Find your break-even cost per bushel from total production costs and expected yield — the price you need to cover expenses.
Open calculatorCalculatorBrick Calculator
Brick calculator: estimate bricks, blocks, and mortar bags for any wall from its dimensions, plus waste allowance so you order right. Free, runs locally.
Open calculatorCalculatorCeiling Fan Size Calculator
Ceiling fan size calculator: match blade span to room square footage and ceiling height for correct airflow. Free, runs locally in your browser, no signup.
Open calculatorCalculatorCeiling Tile Calculator
Ceiling tile calculator: compute tiles, grid rails, border cuts, and boxes needed for any room size. Editable tile sizes, free, no signup, in your browser.
Open calculatorCalculatorChair Rail Calculator
Chair rail calculator: compute chair rail height and the total molding length plus piece count for any room size. Free, private, runs in your browser.
Open calculatorCalculatorConcrete Calculator
Concrete calculator: work out slab volume, cubic yardage, and how many concrete bags you need from your slab dimensions. Free, no signup, runs locally.
Open calculatorCalculatorCountertop Calculator
Countertop calculator: estimate square footage, slab counts and total material cost for kitchen and bath projects. Editable prices, free, runs in your browser.
Open calculatorCalculatorCrown Molding Calculator
Crown molding calculator: work out linear feet, pieces, and compound miter and bevel angles for any room size. Free, runs locally in your browser, no signup.
Open calculatorCalculatorCurtain Length Calculator
Curtain length calculator: compute fabric length and drop from rod height, heading style, and hem allowance for any window size. Free, private, no signup.
Open calculatorCalculatorDeck Board Calculator
Deck board calculator: how many decking boards your deck needs from deck area, board coverage, and a waste allowance. Free, runs locally, no signup needed.
Open calculatorCalculatorDeck Stain Calculator
Deck stain calculator: work out stain gallons needed from deck size, boards, coats and coverage per gallon. Free, no signup, runs entirely in your browser.
Open calculatorCalculatorDeck Staining Cost Calculator
Estimate deck staining cost by square footage and finish tier: sealer, semi-transparent stain, or solid stain. Regional labor multiplier included.
Open calculatorCalculatorDecking Calculator
Decking calculator: estimate deck boards and linear footage needed from deck dimensions, board width, gap spacing, and waste. Free, private, no signup.
Open calculatorCalculatorDrip Irrigation Calculator
Sizing and run time for drip systems: total emitter flow from emitter count and flow rate, plus run time to apply a target depth.
Open calculatorCalculatorDriveway Paving Cost Calculator
Estimate driveway paving cost by size and material tier: asphalt, concrete, or pavers. Regional labor multiplier included.
Open calculatorCalculatorDriveway Sealing Cost Calculator
Estimate driveway sealcoating cost by square footage — the annual asphalt maintenance that keeps it from cracking. Regional multiplier included.
Open calculatorCalculatorDrywall Calculator
Drywall calculator: estimate sheets, joint compound, and screws needed for a room, with waste allowance and optional sheet cost. Free, private, no signup.
Open calculatorCalculatorElectric Fence Energizer & Cost Calculator
Size an electric fence energizer by fence distance and estimate temporary or permanent electric fence cost. Covers joule sizing and post spacing.
Open calculatorCalculatorElectrical Panel Upgrade Cost Calculator
Estimate electrical panel upgrade cost by panel type and tier: basic 100-amp swap to 400-amp service. Regional labor multiplier included.
Open calculatorCalculatorElectrical Wiring Cost Calculator
Estimate electrical wiring cost by square footage for rewiring or new wiring: basic rough-in to full rewire. Regional labor multiplier included.
Open calculatorCalculatorFabric Yardage Calculator
Fabric yardage calculator: turn project dimensions into yards of fabric including pattern repeat and waste. Free, runs locally, editable inputs, no signup.
Open calculatorCalculatorFarm Fence Cost Calculator
Estimate the installed cost of farm and ranch fencing by type, run length, terrain, and gates — with EQIP cost-share savings.
Open calculatorCalculatorFeed Conversion Ratio Calculator
Calculate feed conversion ratio (FCR) and cost of gain for livestock — feed consumed vs weight gained, and the dollars per pound gained.
Open calculatorCalculatorFence Cost per Acre Calculator
Convert property acres to perimeter feet and estimate fencing cost per acre by fence type and terrain. Compare barbed, woven wire, and high-tensile on your land.
Open calculatorCalculatorFence Material Calculator
Fence calculator: estimate posts, rails, pickets, and concrete needed for your fence from length, height, and spacing. Free, editable rates, no signup.
Open calculatorCalculatorFence Post Calculator
Fence post calculator: posts, rails, and post-hole concrete needed from total fence length and post spacing. Free, editable spacing, runs in your browser.
Open calculatorCalculatorFertilizer Rate Calculator
Convert a nutrient recommendation (lb N-P-K per acre) into the pounds of actual fertilizer product needed, and its cost per acre.
Open calculatorCalculatorField Area Acres Calculator
Convert field length and width into acres for square or rectangular fields, with a triangle method for odd shapes. Useful for seeding, spraying, and fencing rates.
Open calculatorPopularCalculatorFlooring Calculator
Flooring calculator: work out square footage, boxes needed, and a waste allowance for hardwood, laminate, tile, or vinyl so you order right. Free, no signup.
Open calculatorCalculatorFoundation Repair Cost Calculator
Estimate foundation repair cost by repair type and home size: cracks, settlement, or piering. Regional labor multiplier included.
Open calculatorCalculatorFurnace & AC Replacement Cost Calculator
Estimate furnace and central AC replacement cost by home size and efficiency tier: standard to high-efficiency. Regional labor multiplier included.
Open calculatorCalculatorGarage Door Replacement Cost Calculator
Estimate garage door replacement cost by door size and material tier: steel, insulated steel, or wood/composite. Regional labor multiplier included.
Open calculatorCalculatorGarage Size Calculator
Garage size calculator works out minimum width, depth and door sizes for your cars, storage and workshop space. Free, runs locally in your browser, no signup.
Open calculatorCalculatorGenerator Size Calculator
Generator size calculator: total your appliance and HVAC wattage, add starting surge, and pick the right generator size. Free, runs locally in your browser.
Open calculatorCalculatorGrade Percentage Calculator
grade percentage calculator that converts points to percentages, weights assignments, and computes the final grade you need on exams. Free, no signup.
Open calculatorCalculatorGrain Bin Capacity Calculator
Estimate how many bushels a round grain bin holds from diameter, eave height, and peaked roof — using the 0.8036 bushel-per-cubic-foot standard.
Open calculatorCalculatorGrain Storage & Drying Cost Calculator
Estimate grain shrink from field-moisture drying, drying charges, and interest on stored grain — the Purdue dry-matter method.
Open calculatorCalculatorGravel Calculator
Gravel calculator: estimate tons or cubic yards of gravel needed for driveways, paths and landscape beds, with cost. Editable depth, free, runs in your browser.
Open calculatorCalculatorGrout Calculator
Grout calculator: compute exactly how many bags or pounds of grout you need from tile size, joint spacing, and total area. Editable rates, free, in your browser.
Open calculatorCalculatorGutter Installation Cost Calculator
Estimate gutter installation cost by linear feet and material tier: aluminum, steel, or copper. Regional labor multiplier included.
Open calculatorCalculatorGutter Size Calculator
Gutter size calculator: size gutters and downspouts from roof area and local rainfall intensity, with recommendations. Editable rates, free, no signup.
Open calculatorCalculatorHigh-Tensile Fence Materials Calculator
Estimate posts and wire for a high-tensile smooth or barbed fence, with lifetime cost compared to barbed wire. Sizes from length, strands, and terrain.
Open calculatorCalculatorInsulation R Value Calculator
Insulation R value calculator: compute total wall or attic R-value across layers and compare material thickness and cost. Editable R-values, free, browser.
Open calculatorCalculatorInsulation R-Value Calculator
Insulation R-value calculator: total R-value for layered walls, attic, or floor assemblies from thickness and material. Free, runs locally, no signup.
Open calculatorCalculatorInterior Painting Cost Calculator
Estimate interior house painting cost by square footage and tier: economy, mid-range, or premium finish. Regional labor multiplier included.
Open calculatorCalculatorIrrigation Cost Calculator
Estimate the cost to water your lawn, garden, or field from gallons used and your water rate, with monthly and seasonal totals.
Open calculatorCalculatorIrrigation Run Time Calculator
How long to run sprinklers or drip to apply the water depth your lawn or crop needs, from precipitation rate and target inches.
Open calculatorCalculatorIrrigation Water Usage Calculator
Estimate gallons of water your lawn, garden, or field needs per watering and per season from area and target depth. Plan irrigation and monthly water budgets.
Open calculatorCalculatorKitchen Remodel Cost Calculator
Estimate kitchen remodel cost by square footage and quality tier: economy, mid-range, or premium. Regional labor multiplier included.
Open calculatorCalculatorLawn Seed Calculator
Lawn seed calculator tells you exactly how much grass seed your lawn needs from its dimensions and seed type coverage rates. Editable rates, free, no signup.
Open calculatorCalculatorLumber Calculator
Lumber calculator: estimate board feet, logs, and cost for framing, decking, and woodworking projects. Free, editable prices, runs in your browser, no signup.
Open calculatorCalculatorMulch Calculator
Mulch calculator: compute cubic yards and bags of mulch needed from your bed size and depth, with a cost estimate. Free, private, runs in your browser.
Open calculatorCalculatorMulch and Soil Calculator
Mulch and soil calculator: convert bed dimensions into cubic yards of mulch, soil, or compost for accurate landscape material orders. Free, no signup.
Open calculatorCalculatorPaint Calculator
Paint calculator: find how much paint you need in gallons from your total wall area, number of coats, and can coverage. Free, no signup, runs locally.
Open calculatorCalculatorPaint Coverage Calculator
Paint coverage calculator: estimate gallons of paint needed for walls and ceilings by room size and coats. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPatio Paver Calculator
Patio paver calculator: enter your patio dimensions and paver size to get the exact number of pavers needed including a waste allowance. Free, no signup.
Open calculatorCalculatorPaver Calculator
Paver calculator: estimate the number of pavers, square footage, and base material needed for your patio or walkway project. Free, runs in your browser.
Open calculatorCalculatorPipe Sizing Calculator
Pipe sizing calculator: find pipe diameter from flow rate and velocity limits, or check velocity and pressure drop. Free, editable values, runs locally.
Open calculatorCalculatorPipe Volume Calculator
Pipe volume calculator: compute the volume of liquid a pipe holds from inner diameter and length, in liters, gallons, or cubic feet. Free, runs in your browser.
Open calculatorCalculatorPond Volume Calculator
Pond volume calculator: work out gallons or litres for rectangular, circular and irregular pond shapes in seconds. Editable units, free, runs in your browser.
Open calculatorCalculatorPool Volume Calculator
Pool volume calculator: compute gallons or liters for rectangle, round, oval, and kidney pools from your measured dimensions. Free, runs in your browser.
Open calculatorCalculatorRain Barrel Calculator
Rain barrel calculator: estimate rainwater collected from your roof area and annual rainfall, by barrel volume and efficiency. Free, editable rates, no signup.
Open calculatorCalculatorRaised Bed Soil Calculator
Raised bed soil calculator: convert your bed dimensions into cubic feet or yards of soil and mix ratios. Free, runs locally in your browser, no signup.
Open calculatorCalculatorRoof Pitch Calculator
Roof pitch calculator: convert pitch to angle in degrees and rise per foot, and get rafter length from span and pitch. Free, runs in your browser, no signup.
Open calculatorCalculatorRoofing Calculator
Roofing calculator: convert roof measurements into squares, bundles of shingles, and material estimates for your project. Free, runs in your browser, no signup.
Open calculatorCalculatorRug Size Calculator
Rug size calculator: find the right rug dimensions for your living room, sofa and dining table layouts instantly. Free, private, runs in your browser.
Open calculatorCalculatorShiplap Calculator
Shiplap calculator: figure board count, square footage, gaps, and waste allowance for your wall width and board spacing. Free, runs locally, no signup.
Open calculatorCalculatorSiding Calculator
Siding calculator: measure wall square footage, subtract windows and doors, add waste factor, and estimate siding squares and boxes needed. Free, no signup.
Open calculatorCalculatorSlope Calculator
Slope calculator: find the slope, angle, and equation of a line from two points or rise over run. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorSprinkler Heads Calculator
Sprinkler heads calculator: use your lawn size, spacing and water pressure to work out how many heads you need. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSprinkler Precipitation Rate Calculator
Find your sprinkler zone's precipitation rate in inches per hour from flow rate and coverage area, then set run time.
Open calculatorCalculatorSquare Feet to Linear Feet Calculator
Square feet to linear feet calculator: convert area to linear feet using your material width for flooring and lumber orders. Free, editable, runs locally.
Open calculatorCalculatorSquare Footage Calculator
Square footage calculator: compute room or whole home square feet from length and width measurements, with multi-room totals. Free, private, runs locally.
Open calculatorCalculatorStair Calculator
Stair calculator: convert total rise into riser height, tread depth, stringer length, and step count that meet building code. Free, no signup, runs locally.
Open calculatorCalculatorStaircase Calculator
Staircase calculator: compute rise, run, stringer length, and step count from total height. Editable code requirements, free, runs locally in your browser.
Open calculatorCalculatorSump Pump Calculator
sump pump calculator that sizes pump capacity in GPM from pit size, water table, and runoff area to prevent basement flooding. Free, runs locally, no signup.
Open calculatorCalculatorTank Volume Calculator
Tank volume calculator: compute exact capacity in gallons or litres for cylinder, rectangle and capsule tank shapes. Free, runs in your browser, no signup.
Open calculatorCalculatorTile Calculator
Tile calculator: work out tiles needed for any floor or wall project, with waste allowance and box counts. Editable waste rate, free, runs in your browser.
Open calculatorCalculatorTile Count Calculator
Tile count calculator: work out exactly how many tiles you need for any floor or wall area, including cut and breakage waste allowance. Editable sizes, free.
Open calculatorCalculatorToilet Water Calculator
Toilet water calculator: estimate litres or gallons per flush and yearly water use and cost from your toilet's specifications. Editable rates, free, no signup.
Open calculatorCalculatorWainscoting Calculator
Wainscoting calculator: compute panel counts, even spacing, and board footage for walls of any room length. Free, runs locally in your browser, no signup.
Open calculatorCalculatorWallpaper Calculator
Wallpaper calculator: work out rolls needed from wall dimensions, pattern repeat, and doors or windows, with wastage margin built in. Free, runs locally.
Open calculatorCalculatorWater Heater Sizing Calculator
Water heater sizing calculator: match first hour rating and tank size to your household peak hour demand, with editable rates. Free, private, no signup.
Open calculatorCalculatorWater Pressure Calculator
Water pressure calculator: convert psi, bar, kPa, and head of water for pipes and pumps. Free, editable units, runs locally in your browser, no signup.
Open calculatorCalculatorWindow Size Calculator
Window size calculator: compute rough opening, glass area, and standard window sizes from your wall framing dimensions. Free, private, in your browser.
Open calculatorCalculatorWoven Wire / Field Fence Materials Calculator
Estimate woven wire rolls, posts, and total cost for a field fence for cattle, horses, goats, or sheep. Sizes materials from acreage with post spacing options.
Open calculatorConverters 53
ASCII Converter
ASCII converter: turn any text into ASCII character codes and convert ASCII codes back into readable text instantly. Free, private, in-browser, no signup.
Open converterConverterAncient Unit Converter
Ancient unit converter: convert cubits to feet and meters, Roman miles, stadia, and biblical weights and measures instantly. Free, runs in your browser.
Open converterConverterAngle Converter
Angle converter that switches between degrees, radians, gradians, turns, arcminutes, and arcseconds instantly. Free, private, runs in your browser, no signup.
Open converterConverterArea Converter
Area converter: square feet, acres, hectares, and square meters. Free area converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterBaking Conversions
Baking conversions calculator: convert cups to grams, tablespoons to cups, and swap baking measurements by ingredient for accurate recipes. Free, no signup.
Open converterConverterBase64 Encoder Decoder
Base64 encoder decoder: encode any text to Base64 or decode Base64 strings and images instantly. Free, private, runs locally in your browser, no signup.
Open converterConverterBelt Size Calculator
Belt size calculator converts your pant waist size into the correct belt length in inches and cm. Free, private, runs locally in your browser, no signup.
Open converterConverterCSV to JSON Converter
CSV to JSON converter: paste CSV data and get clean JSON instantly with header keys and correct type handling. Free, private, runs locally, no signup.
Open converterConverterChildren Size Converter
Children size converter: US to EU kids clothing sizes. Free children size converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterCrochet Hook Converter
Crochet hook converter: translate hook sizes between US letters, UK numbers, and metric millimeters for any yarn pattern. Free, private, runs in your browser.
Open converterConverterDPI Calculator
DPI calculator: pixels per inch from pixel dimensions and print size. Free dpi calculator with the formula shown - runs entirely in your browser, no signup.
Open converterConverterData Storage Converter
Data storage converter: bytes, KB, MB, GB, TB (binary 1024 base). Free data storage converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterDistance Between ZIP Codes Calculator
Distance between ZIP codes calculator: measure straight-line distance between any two US ZIP codes for shipping zones and territory planning. Free, runs locally.
Open converterConverterDress Size Converter
Dress size converter: convert your bust and waist measurements between US, UK, EU, and Italian dress sizes instantly. Free, private, runs in your browser.
Open converterConverterEnergy Converter
Energy converter that switches between joules, calories, kWh, BTU, foot-pounds, electronvolts, and more instantly. Free, runs in your browser, no signup.
Open converterConverterGlove Size Calculator
Glove size calculator: S/M/L/XL from hand circumference. Free glove size calculator with the formula shown - runs entirely in your browser, no signup.
Open converterConverterHat Size Calculator
Hat size calculator: convert head circumference in inches or centimetres into US, UK, and metric hat sizes instantly. Free, private, runs locally, no signup.
Open converterConverterHectare to Acre Converter
Hectare to acre converter: hectares, acres, square meters. Free hectare to acre converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterHex to Decimal Converter
Hex to decimal converter: convert hexadecimal to decimal and decimal to hex instantly, with a conversion chart for reference. Free, runs in your browser.
Open converterConverterHorsepower to kW Converter
Horsepower to kW converter instantly converts hp to kilowatts and back, mechanical, metric or electrical. Free, private, runs locally in your browser.
Open converterConverterImage Resizer
image resizer that resizes and compresses photos to exact pixel dimensions or file size without quality loss, right in your browser. Free, private, no signup.
Open converterConverterInches to CM Converter
Inches to cm converter turns any inch measurement into centimeters instantly, with a reference table for common lengths. Free and runs in your browser, no signup.
Open converterConverterJean Size Calculator
Jean size calculator converts your waist and hip measurements into matching US, UK and EU jeans sizes for men and women. Free, runs locally, no signup.
Open converterConverterKnitting Needle Converter
Knitting needle converter: US, mm and UK needle sizes. Free knitting needle converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterLength Converter
Length converter: miles, kilometers, meters, feet, inches, yards. Free length converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterLiters to Ounces Converter
Liters to ounces converter: convert liters to US or imperial fluid ounces with a reference table of common values. Free, accurate, runs in your browser.
Open converterConverterMetric Prefix Converter
Metric prefix converter: kilo, mega, giga, tera and friends. Free metric prefix converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterOctal Converter
Octal converter: convert octal numbers to decimal, binary, and hexadecimal, or back the other way, instantly and accurately. Free, private, in-browser.
Open converterConverterPDF to JPG Converter
convert pdf to jpg by turning each PDF page into a high-resolution JPG or PNG image right in your browser, with no upload. Free, private, no signup required.
Open converterConverterPSI to Bar Converter
PSI to bar converter: convert psi to bar and bar to psi using the exact definition 1 bar = 14.503773773 psi, with a reference table. Free, instant, runs in your browser.
Open converterConverterPressure Converter
Pressure converter: convert psi, bar, kPa, atm, and pascal instantly for tires, HVAC, hydraulics, and scuba tanks. Free and private, runs in your browser.
Open converterConverterRing Size Calculator
Ring size calculator: US ring size from finger circumference. Free ring size calculator with the formula shown - runs entirely in your browser, no signup.
Open converterConverterRoman Numeral Converter
Roman numeral converter: translate decimal numbers to Roman numerals and Roman numerals back to numbers instantly, for values up to 3999. Free, no signup.
Open converterConverterScale Converter
scale converter that translates measurements between model scales like 1:24, 1:48, 1:87 and real-world sizes in inches, mm, and feet. Free, runs in your browser.
Open converterConverterScientific Notation Converter
Scientific notation converter: turn decimals into scientific or engineering notation and back, with adjustable significant figures. Free, runs in your browser.
Open converterConverterScreen Size Calculator
Screen size calculator: convert between diagonal, width, and height by aspect ratio and compare the viewing area of TV or monitor sizes. Free, no signup.
Open converterConverterShoe Size Conversion
Shoe size conversion calculator: convert US, UK, EU, and centimeter shoe sizes for men, women, and kids instantly. Free, private, runs locally, no signup.
Open converterConverterSitemap Validator
Sitemap validator: check XML sitemaps and robots.txt files for errors, broken URLs, and format problems before search engines crawl them. Free, no signup.
Open converterConverterSpeed Converter
Speed converter converts between mph, km/h, knots, m/s, and ft/s instantly with a quick reference table. Free, private, runs in your browser, no signup.
Open converterConverterStone to Pounds Converter
Stone to pounds converter: convert stone to pounds and kilograms instantly, with the formula shown for any value. Free, private, runs locally in your browser.
Open converterConverterTemperature Converter
Temperature converter converts between Celsius, Fahrenheit, Kelvin, and Rankine instantly with a reference table. Free, private, runs in your browser, no signup.
Open converterConverterText Case Converter
Text case converter: switch text to uppercase, lowercase, Title Case, camelCase, or capitalize sentences instantly. Free, no signup, runs in your browser.
Open converterConverterTitle Case Converter
Title case converter: format any text into APA, Chicago, AP, or MLA title case with correct rules for small words. Free, private, runs in your browser.
Open converterConverterTorque Converter
Torque converter: convert lb-ft, Nm, kg-m, and in-lb instantly for engine specs, fastener specs, and DIY repairs. Free, private, runs in your browser, no signup.
Open converterConverterUS to EU Size Converter
US to EU size converter: translate US shoe and clothing sizes into accurate EU equivalents from your foot or body measurements. Free, private, no signup.
Open converterPopularConverterUnit Converter
Unit converter: convert length, weight, temperature, volume, speed, pressure, and area values between metric and imperial. Free, private, runs locally.
Open converterConverterVolume Converter
Volume converter that switches between liters, gallons, cups, milliliters, cubic meters, and more instantly. Free, private, runs in your browser, no signup.
Open converterConverterWeight Converter
Weight converter: pounds, kilograms, ounces, grams, and stones. Free weight converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterYard to Feet Converter
Yard to feet converter: convert yards to feet and feet to yards instantly for fabric, landscaping, and sports field measurements. Free, runs in your browser.
Open converterConverterYarn Weight Converter
Yarn weight converter: US names to wraps per inch and needle size. Free yarn weight converter with the formula shown - runs entirely in your browser, no signup.
Open converterConverterZIP Code County Lookup
ZIP code county lookup: find the county, state, and FIPS code for any US ZIP code instantly, for tax rates and address checks. Free, no signup, runs locally.
Open converterConverterZIP Code Lookup
zip code lookup that returns the city, state, county, and timezone for any US ZIP code instantly. Free, private, runs entirely in your browser, no signup.
Open converterConverterZIP Code Timezone Calculator
zip code timezone calculator that maps any US ZIP code to its time zone, current local time, and UTC offset instantly. Free, runs in your browser, no signup.
Open converterEnergy & Electrical 24
Appliance Energy Cost Calculator
Appliance energy cost calculator: enter watts and hours used to see daily, monthly, and yearly running cost per appliance. Free, editable rates, no signup.
Open calculatorCalculatorBattery Bank Calculator
Battery bank calculator sizes battery capacity in Ah and kWh from your daily load, voltage and days of autonomy. Free, editable rates, runs in your browser.
Open calculatorCalculatorBattery Life Calculator
Battery life calculator: estimate device runtime from battery capacity in mAh or Wh and current draw. Editable efficiency losses, free, runs locally offline.
Open calculatorCalculatorBattery Runtime Calculator
Battery runtime calculator: estimate how long a battery lasts from capacity, voltage, load watts, and efficiency. Free, private, runs in your browser.
Open calculatorCalculatorBreaker Size Calculator
Breaker size calculator: size a circuit breaker from appliance wattage or connected amps with the 80% NEC safety margin. Free, editable inputs, no signup.
Open calculatorCalculatorCapacitance Calculator
Capacitance calculator: compute capacitance from charge and voltage, or series and parallel capacitor banks instantly. Free, no signup, runs in your browser.
Open calculatorCalculatorDehumidifier Sizing Calculator
Dehumidifier sizing calculator: find the pint capacity you need from your room size and dampness level. Free, editable inputs, runs locally, no signup.
Open calculatorCalculatorEV Charging Cost Calculator
EV charging cost calculator: estimate the cost to charge your electric car from battery size, electricity rate, and efficiency. Free, editable rates, no signup.
Open calculatorCalculatorElectric Bill Estimator
Electric bill estimator: turn appliance wattage, usage hours, and your rate into a monthly and yearly electricity cost forecast. Free, editable rates, no signup.
Open calculatorCalculatorElectricity Cost Calculator
Electricity cost calculator: compute what any appliance costs to run from wattage, hours used, and your rate. Editable rates, free, runs locally in your browser.
Open calculatorCalculatorFurnace Size Calculator
Furnace size calculator: compute BTU output and tonnage needed from square footage, climate zone, and insulation. Editable rates, free, in your browser.
Open calculatorCalculatorGenerator Load Calculator
Generator load calculator: total running and starting watts for your appliances, then size the right generator. Editable loads, free, runs in your browser.
Open calculatorCalculatorGenerator Runtime Calculator
Generator runtime calculator: estimate run hours from fuel tank size, load, and consumption rate. Free, editable rates, runs locally in your browser, no signup.
Open calculatorCalculatorInductance Calculator
Inductance calculator: compute coil inductance from turns, core, and dimensions, or reactance from frequency. Free, private, runs in your browser, no signup.
Open calculatorCalculatorInverter Size Calculator
Inverter size calculator matches inverter wattage to your appliance loads with surge headroom for motors and pumps. Free, private, runs locally, no signup.
Open calculatorCalculatorLED Savings Calculator
LED savings calculator: compare LED vs incandescent bulbs and compute yearly energy cost savings and payback period. Free, runs in your browser, no signup.
Open calculatorCalculatorLumens Calculator
Lumens calculator: convert lumens to watts and lux, or size the lighting a room needs from area and brightness target, so you buy the right bulbs. Free.
Open calculatorCalculatorPower Factor Calculator
Power factor calculator: compute power factor plus real, reactive, and apparent power from kW and kVA readings. Free, runs in your browser, no signup.
Open calculatorCalculatorRC Time Constant Calculator
RC time constant calculator: compute tau plus charge and discharge times from your resistor and capacitor values instantly. Free, editable values, no signup.
Open calculatorCalculatorSolar Panel Savings Calculator
Solar panel savings calculator: estimate yearly and lifetime electricity savings from system size, rates, and sunlight. Editable rates, no signup, runs locally.
Open calculatorCalculatorTransformer Calculator
Transformer calculator: compute secondary voltage, turns ratio, and current from primary and winding specs for single-phase units. Free, runs locally.
Open calculatorCalculatorWatts to Amps Calculator
Watts to amps calculator: convert watts to amps for DC, single-phase AC, or three-phase AC circuits using voltage and power factor. Free, private, no signup.
Open calculatorCalculatorWind Turbine Output Calculator
Wind turbine output calculator estimates power output and annual energy from rotor size, wind speed and efficiency. Free, runs in your browser, no signup.
Open calculatorCalculatorWire Size Calculator
Wire size calculator: pick correct wire gauge from load current, voltage drop, and cable run length. Editable conductor settings, free, runs locally offline.
Open calculatorEveryday Calculators 146
AI Citation Checker
Free AI citation checker: paste a URL and get a 0-100 citation-readiness score from 28 checks — sourced numbers, entity clarity, freshness, structured data, and AI-slop tells. See exactly what answer engines look for before they cite you.
Open calculatorCalculatorAbsolute Value Calculator
Absolute value calculator: find |x| for any number or expression, with clear step-by-step working shown instantly. Free, private, runs in your browser.
Open calculatorCalculatorAge Calculator
Age calculator: compute your exact age in years, months, and days from any birth date, plus days until your next birthday. Free, runs in your browser.
Open calculatorCalculatorAmortization Calculator
Amortization calculator: build a full mortgage or loan amortization schedule and see how extra payments cut interest. Free, editable rates, no signup.
Open calculatorCalculatorAnnuity Calculator
Annuity calculator: compute annuity payments, future value, or present value from rate, term, and payment frequency. Free, editable rates, no signup needed.
Open calculatorCalculatorArc Length Calculator
Arc length calculator: compute a circle's arc length from radius and central angle in degrees or radians for geometry and engineering work. Free, no signup.
Open calculatorCalculatorArea Perimeter Calculator
Area and perimeter calculator: rectangle, triangle, circle. Free area perimeter calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorAspect Ratio Calculator
Aspect ratio calculator: get exact width and height dimensions for 16:9 video, images, and screens from any ratio. Free, private, runs in your browser.
Open calculatorCalculatorBPM to Delay Time Calculator
BPM to delay time calculator: convert your track tempo into ms per beat, quarter, eighth, and dotted eighth delay times for music production. Free, no signup.
Open calculatorCalculatorBTU Calculator
BTU calculator: size heating and cooling by room dimensions, insulation, and climate to get the right BTU output. Free, runs locally, no signup required.
Open calculatorCalculatorBig Number Calculator
Big number calculator: exact arithmetic on numbers up to 10^30. Free big number calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorBond Calculator
Bond calculator: compute bond price, yield to maturity, and coupon payments from face value, rate, and term. Free, editable inputs, runs in your browser.
Open calculatorCalculatorBusiness Date Calculator
Business date calculator: add or subtract working days from any date, automatically skipping weekends and holidays. Free, no signup, runs locally in browser.
Open calculatorCalculatorCD Calculator
CD calculator: compute certificate of deposit interest and maturity value from deposit, rate, and term with compounding. Free, private, runs in your browser.
Open calculatorCalculatorCalories Burned Calculator
Calories burned calculator: estimate calories burned for over 100 activities using MET values, your body weight, and workout duration. Free, no signup.
Open calculatorCalculatorCircle Area Calculator
Circle area calculator: area and circumference from radius. Free circle area calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCircle Calculator
Circle calculator: solve circumference, area, diameter, and radius from any one known value instantly. Free online tool, private, runs locally, no signup.
Open calculatorCalculatorCitation Formatter
Citation formatter: generate APA and MLA citations and bibliographies from your source details in seconds. Free, private, runs in your browser, no signup.
Open calculatorCalculatorCoefficient of Variation Calculator
Coefficient of variation calculator: turn standard deviation and mean into CV, the relative standard deviation for comparing data spread. Free, no signup.
Open calculatorCalculatorCoin Flip Tool
Coin flip tool: flip a coin online with truly random results, flip history counts, and multiple coin tosses for quick decisions and games. Free, no signup.
Open calculatorCalculatorCombinations Calculator (nCr)
Combinations calculator (nCr): find how many ways you can choose r items from n, with the combination formula explained step by step. Free, no signup.
Open calculatorCalculatorComplex Number Calculator
Complex number calculator: add, subtract, multiply, and divide complex numbers in rectangular form with exact results. Free, runs in your browser, no signup.
Open calculatorCalculatorConcrete Cost Per Square Foot Calculator
Concrete cost per square foot calculator: price a concrete slab by dimensions, thickness, mix strength, and local rate. Free, editable rates, no signup.
Open calculatorCalculatorCone Volume Calculator
Cone volume calculator: find cone volume from radius and height in seconds, with slant height and base area shown. Free, runs in your browser, no signup.
Open calculatorCalculatorConfidence Interval Calculator
Confidence interval calculator: build a confidence interval for a mean from sample size, mean, and standard deviation. Free, private, runs in your browser.
Open calculatorCalculatorContrast Ratio Calculator (WCAG)
Contrast ratio calculator: test text and background colors against WCAG AA and AAA thresholds for accessible color contrast. Free, runs in your browser.
Open calculatorCalculatorCross Product Calculator
Cross product calculator: vector product of two 3D vectors. Free cross product calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCurrency Converter
Currency converter: calculate live foreign exchange rates for USD to EUR and more before you trade, shop, or travel abroad. Free, no signup, runs in your browser.
Open calculatorCalculatorCustom Calculator Builder
Build your own calculator: pick inputs, a formula, and publish a private, checkable tool in your browser.
Open calculatorCalculatorDaily Hydration Calculator
Daily hydration calculator: find how much water you should drink a day based on your body weight and activity level. Free, runs in your browser, no signup.
Open calculatorCalculatorData Transfer Rate Calculator
Data transfer rate calculator: convert Mbps to GB and estimate download or upload time for any file size at any connection speed. Free, private, no signup.
Open calculatorCalculatorDate Calculator
Add or subtract days, weeks, months, or years to or from any date. Free date calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorDay of the Week Calculator
Day of the week calculator that finds the weekday for any date, past or future, including leap years, in seconds. Free, runs in your browser, no signup.
Open calculatorCalculatorDays Between Dates Calculator
Days between dates calculator: count days, weeks, weekdays, and months between any two calendar dates instantly. Free, runs in your browser, no signup.
Open calculatorCalculatorDepreciation Calculator
Depreciation calculator: compute straight line, declining balance, and sum of years digits depreciation schedules by asset. Free, runs in your browser.
Open calculatorCalculatorDice Roller
Dice roller: roll D6, D20, or any dice online with instant random results, per-die breakdown, and totals. Free, private, runs in your browser, no signup.
Open calculatorCalculatorDoomsday Calculator
Doomsday calculator: use the famous Doomsday algorithm to find the exact weekday of any date in history. Free, no signup, runs locally in your browser.
Open calculatorCalculatorDot Product Calculator
Dot product calculator: scalar product of two 3D vectors. Free dot product calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorDue Date Calculator
Due date calculator: estimate your pregnancy due date from the first day of your last period or your conception date. Free, private, runs in your browser.
Open calculatorCalculatorEMI Calculator
EMI calculator: compute your loan monthly installment from principal, interest rate, and tenure, with total interest and payment breakdown. Free, runs in browser.
Open calculatorCalculatorEllipse Calculator
Ellipse calculator: compute area, perimeter, eccentricity, and foci from the semi-major and semi-minor axes for geometry and design work. Free, no signup.
Open calculatorCalculatorEndpoint Calculator
Endpoint calculator: find a line segment's missing endpoint from one endpoint and the midpoint, with step-by-step coordinates for algebra. Free, no signup.
Open calculatorCalculatorExponent Calculator
Exponent calculator: compute any base raised to any power, including negative, zero, and fractional exponents, with fast precise results. Free, no signup.
Open calculatorCalculatorExponential Growth Calculator
Exponential growth calculator: project any starting value forward from a growth rate and period, with doubling time shown. Free, private, in-browser, no signup.
Open calculatorCalculatorFactorial Calculator
Factorial calculator: compute n! for any number with exact large-integer results for math, statistics, and probability. Free, private, runs in your browser.
Open calculatorCalculatorFibonacci Calculator
Fibonacci calculator: generate the nth Fibonacci number and the full sequence up to it with exact results instantly. Free, private, runs in your browser.
Open calculatorCalculatorFlight Carbon Footprint Calculator
Flight carbon footprint calculator: estimate CO2 emissions for any flight by distance, cabin class and passengers. Free, editable inputs, runs in your browser.
Open calculatorCalculatorFraction Operations Calculator
Fraction operations calculator: add, subtract, multiply, and divide fractions with simplified results and step-by-step working. Free, runs locally, no signup.
Open calculatorCalculatorFractions Calculator
Fractions calculator: add, subtract, multiply, and divide fractions and mixed numbers with step-by-step simplified and decimal results. Free, no signup.
Open calculatorCalculatorFuel & Trip Cost Calculator
Fuel cost calculator: estimate gas money for any trip from distance, MPG, and fuel price, then split it between passengers. Free, editable rates, no signup.
Open calculatorCalculatorGCF and LCM Calculator
GCF and LCM calculator: find the greatest common factor and least common multiple of two or more numbers instantly. Free, runs in your browser, no signup.
Open calculatorCalculatorGas Mileage Calculator
Gas mileage calculator: convert fuel gallons used and miles driven into MPG or L/100km instantly for any trip or fill-up. Free, runs locally, no signup.
Open calculatorPopularCalculatorGeneral and Scientific Calculator
General and scientific calculator: do everyday math plus trig, powers, logs, and functions in one clean keypad. Free, private, runs locally, no signup.
Open calculatorCalculatorGolden Ratio Calculator
Golden ratio calculator: compute the golden ratio 1.618, golden rectangle dimensions, and section proportions from any input number. Free, runs in your browser.
Open calculatorCalculatorHELOC Calculator
HELOC calculator: estimate your home equity line of credit limit, monthly interest-only and repay payments, and total cost. Free, editable rates, no signup.
Open calculatorCalculatorHEX to RGB Converter
HEX to RGB converter: convert any hex color code into RGB values instantly for CSS, design, and styling work. Free, private, runs in your browser, no signup.
Open calculatorCalculatorHeat Index Calculator
Heat index calculator: convert air temperature and humidity into the feels-like heat index and outdoor risk level. Free, private, runs in your browser.
Open calculatorCalculatorHeron's Formula Calculator
Heron's formula calculator: triangle area from three sides. Free heron's formula calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorHexagon Calculator
Hexagon calculator: area and perimeter of a regular hexagon. Free hexagon calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorIRR Calculator
Calculate the internal rate of return from a series of cash flows. Free irr calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorInvestment Return Calculator
Investment return calculator: project final value and growth from contributions, rate of return, compounding, and time horizon. Free, editable rates, no signup.
Open calculatorCalculatorJet Lag Adjustment Calculator
Jet lag adjustment calculator: build a day-by-day sleep and light schedule for your trip so you adapt faster. Free, private, runs in your browser, no signup.
Open calculatorCalculatorLLM Cost Checker
Check your real LLM API cost from the usage response: catches the 272K-token price cliff, near-zero cache hit rate, and batch/flex/fast mode multipliers. Astra, DeepSeek and GLM presets, or your own rate card. Private, in-browser.
Open calculatorCalculatorLaw of Cosines Calculator
Law of cosines calculator: solve any triangle side or angle from three known values, with working steps included. Free, private, runs in your browser.
Open calculatorCalculatorLine Intersection Calculator
Line intersection calculator: where two lines cross. Free line intersection calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorLinear Equation Solver
Linear equation solver that solves systems of equations step by step with substitution, elimination, or Cramer's rule. Free, no signup, in your browser.
Open calculatorCalculatorLinear Interpolation Calculator
Linear interpolation calculator: compute intermediate values between two data points plus the slope and line equation. Free, private, in your browser.
Open calculatorCalculatorLogarithm Calculator
Logarithm calculator: find the log of any number in any base, including natural log, with the formula shown. Runs entirely in your browser, no signup.
Open calculatorCalculatorMarkdown Table Generator
Markdown table generator: convert CSV, text, or pasted data into GFM pipe tables for GitHub docs and wikis instantly. Free, private, no signup required.
Open calculatorCalculatorMatrix Calculator
Matrix calculator: compute determinant, inverse, transpose, rank, and products for 2x2 to 4x4 matrices with clear instant results. Free, private, no signup.
Open calculatorCalculatorMatrix Determinant Calculator
Matrix determinant calculator: compute the determinant of 2x2, 3x3, and up to 6x6 matrices with steps shown. Free, private, runs locally in your browser.
Open calculatorCalculatorMatrix Transpose Calculator
Matrix transpose calculator: transpose any matrix up to 10x10 instantly, rows flipped to columns, for linear algebra and data work. Free, runs locally.
Open calculatorCalculatorMean Median Mode Calculator
Mean median mode calculator: compute mean, median, mode, and range for any set of numbers instantly and accurately. Free, private, runs in your browser.
Open calculatorCalculatorModulo Calculator
Modulo calculator: compute a mod b with quotient and remainder for programming, hashing, ciphers, and clock math. Free, private, runs in your browser.
Open calculatorCalculatorNatural Log Calculator
Natural log calculator: compute ln(x) for any positive number with adjustable precision and large or small value support. Free, private, in-browser, no signup.
Open calculatorCalculatorNet Worth Calculator
Add up your assets and liabilities to find your net worth. Free net worth calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorNth Root Calculator
Nth root calculator: find any root of any number, including decimals and negative values where the root is defined. Free, private, in-browser, no signup.
Open calculatorCalculatorNumbers to Words Converter
Numbers to words converter: write any number or check amount in words, with currency support for checks and legal documents. Free, no signup, runs locally.
Open calculatorCalculatorOhm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's law. Free ohms law calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorOne Rep Max Calculator
One rep max calculator: estimate your 1RM from weight lifted and reps using Epley, Brzycki, and Lombardi formulas with training charts. Free, no signup.
Open calculatorCalculatorOrder of Operations Calculator (PEMDAS)
Evaluate math expressions with the correct order of operations (PEMDAS): parentheses, exponents, multiplication and division, then addition and subtraction.
Open calculatorCalculatorOvulation Calculator
Ovulation calculator: predict your fertile window and next ovulation date from cycle length and last period. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPaint Cost Per Square Foot Calculator
Paint cost per square foot calculator: estimate paint price per sq ft and cost to paint a room from area, coats, and paint price. Free, runs in your browser.
Open calculatorCalculatorParallelogram Area Calculator
Parallelogram area calculator: area from base and height. Free parallelogram area calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPayPal Fee Calculator
PayPal fee calculator: estimate goods and services fees, net proceeds, and reverse gross-up amounts at 3.49 percent plus 0.49 per deal. Editable rates, free.
Open calculatorCalculatorPension Calculator
Pension calculator: project retirement income from annual contributions, employer match, expected growth rate, and years to retirement. Free, no signup.
Open calculatorCalculatorPercent Difference Calculator
Percent difference calculator compares two values to show relative difference with worked steps. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorPercentage Change Calculator
Percentage change calculator: find percent increase or decrease between two values, with the exact formula shown. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPercentage Markup Calculator
Percentage markup calculator: get sell price from cost and markup percent, and see margin versus markup side by side. Editable rates, free, no signup.
Open calculatorCalculatorPercentile Calculator
Percentile calculator: find percentile rank, the 90th percentile, or where a value falls in your data set, with the formula shown. Free, runs in browser.
Open calculatorCalculatorPermutations Calculator (nPr)
Permutations calculator: compute nPr arrangements of n objects taken r at a time, with the formula shown for checking. Free, runs in your browser, no signup.
Open calculatorCalculatorPolynomial Evaluator
Polynomial evaluator: substitute any value into a polynomial and get the exact result, with each substitution step shown. Free, private, runs in your browser.
Open calculatorCalculatorPresent Value Calculator
Present value calculator: discount a future sum or stream of payments to today's value using your own interest rate. Free, private, editable rates, no signup.
Open calculatorCalculatorPrice Per Square Foot Calculator
Price per square foot calculator: divide a property price or build cost by area to compare cost per sq ft across homes or quotes. Free, private, no signup.
Open calculatorCalculatorPrime Checker
Prime checker: test if any number is prime and show its full factor list instantly for math and coding work. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPrize Wheel Spinner
Spin the wheel to pick a random winner or prize from your own custom list. Free prize spinner for classrooms, raffles and streams, runs in your browser.
Open calculatorCalculatorProportion Solver
Proportion solver: find the missing value in any ratio equation a:b = c:x instantly, with cross-multiplication working shown. Free, private, in-browser.
Open calculatorCalculatorPythagorean Theorem Calculator
Pythagorean theorem calculator: solve for any right triangle side from a, b, or c with the steps shown. Free, private, runs in your browser, no signup.
Open calculatorCalculatorQuadratic Formula Calculator
Quadratic formula calculator: solve ax^2+bx+c=0 for real and complex roots plus discriminant and vertex, with worked steps. Free, runs locally, no signup.
Open calculatorCalculatorQuartile Calculator
Quartile calculator: find Q1, Q2, Q3 and the interquartile range for any data set with the quartiles formula shown. Free, private, runs in your browser.
Open calculatorCalculatorRMD Calculator
RMD calculator: compute required minimum distributions from account balances using IRS life expectancy factors. Editable, free, runs locally, no signup.
Open calculatorCalculatorRandom Name Picker
Random name picker: paste a list of names and pick one at random for giveaways, classroom draws, or team selection. Free, runs in your browser, no signup.
Open calculatorCalculatorRandom Number Generator
Random number generator: pick random integers or decimals in any range, with or without duplicates, for draws, games, sampling. Free, runs in your browser.
Open calculatorCalculatorRandom Team Splitter
Random team splitter: divide any list of names into balanced teams or groups in one click. Free, no signup, runs locally so your roster stays private.
Open calculatorCalculatorRegex Tester
Regex tester: test regular expressions against sample text and see live matches, capture groups, and errors to debug patterns fast. Free, private, no signup.
Open calculatorCalculatorRemainder Calculator
Remainder calculator: quotient and remainder of a division. Free remainder calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorRoad Trip Time Calculator
Road trip time calculator: estimate driving time, breaks, fuel stops and arrival time for any route and speed. Free, no signup, runs entirely in your browser.
Open calculatorCalculatorRoth IRA Calculator
Roth IRA calculator: project tax-free retirement savings from your contributions, expected growth rate, and years to retirement. Free, editable rates.
Open calculatorCalculatorRound Up Down Calculator
Round up/down calculator: nearest multiple in both directions. Free round up down calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorRounding Numbers Calculator
Rounding calculator: round decimals to the nearest tenth, hundredth, ten, hundred, or any place value you choose instantly. Free, runs in your browser.
Open calculatorCalculatorSample Size Calculator
Sample size calculator: determine how many survey respondents you need for a target confidence level and margin of error. Free, no signup, runs in your browser.
Open calculatorCalculatorScenario Workspace
Compare multiple what-if calculator scenarios side by side.
Open calculatorCalculatorSemicircle Calculator
Semicircle calculator: get area, perimeter, arc length and diameter from radius or diameter in one step. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSeptic Tank Size Calculator
Septic tank size calculator: estimate required tank gallons from bedroom count and daily usage assumptions for code-compliant sizing. Free, no signup.
Open calculatorCalculatorSeries Sum Calculator
Series sum calculator: total arithmetic and geometric series fast, with partial sums and term counts shown. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSimple Interest Calculator
Calculate simple interest and total amount with interest using principal, annual rate, and time. Simple interest applies only to the original principal.
Open calculatorCalculatorSimplify Fractions Calculator
Simplify fractions calculator: reduce any fraction to lowest terms and convert between improper fractions and mixed numbers with steps shown. Free, no signup.
Open calculatorCalculatorSlope Intercept Calculator
Slope intercept calculator: y = mx + b from two points. Free slope intercept calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorSocial Media Engagement Rate Calculator
Social media engagement rate calculator: work out Instagram and TikTok engagement rate from likes, comments, shares, and follower count. Free, no signup.
Open calculatorCalculatorSocial Media Value Calculator
Social media value calculator: estimate what your views are worth per post, month, and year using your own editable CPM. Free, private, no signup.
Open calculatorCalculatorSonotube Concrete Calculator
Sonotube concrete calculator: estimate concrete for a round column in cubic feet, cubic yards, and 60 or 80 lb bags. Free, runs in your browser, no signup.
Open calculatorCalculatorSphere Volume Calculator
Sphere volume calculator: volume and surface area from radius. Free sphere volume calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorStandard Deviation Calculator
Standard deviation calculator: compute sample and population SD, variance, mean, and margin of error from any data set. Free, runs in your browser, no signup.
Open calculatorCalculatorStandard Error Calculator
Standard error calculator: compute the standard error of the mean (SEM) using the standard error formula from your sample. Free, private, runs locally, no signup.
Open calculatorCalculatorStatistics Calculator
Statistics calculator: get mean, median, mode, range, standard deviation, variance, and geometric mean with sample or population mode. Free, no signup.
Open calculatorCalculatorStripe Fee Calculator
Stripe fee calculator: estimate 2.9% + $0.30 processing fees, reverse fees to gross up invoices, and see net proceeds. Free, editable rates, runs in your browser.
Open calculatorCalculatorSun & Moon Planner
Sun and moon planner: find sunrise, sunset, moonrise, moonset, and moon phase for any date and location to plan photography or stargazing. Free, runs locally.
Open calculatorCalculatorSunrise Sunset Calculator
Sunrise sunset calculator: get local sunrise, sunset, golden hour, and day length for any date and location worldwide. Free, runs in your browser, no signup.
Open calculatorCalculatorSurface Area Calculator
Surface area calculator for cubes, spheres, cylinders, cones, and more. Shows the formula for each shape and runs entirely in your browser with no signup.
Open calculatorCalculatorTime Duration Calculator
Time duration calculator: find the exact time elapsed between two dates and times in days, hours, and minutes. Free, no signup, runs locally in your browser.
Open calculatorCalculatorTime Zone Converter
Time zone converter: compare times across world time zones and plan meetings that work for everyone. Free, no signup, runs locally in your web browser.
Open calculatorCalculatorTimezone Converter
Convert a time between cities and time zones worldwide with automatic daylight saving adjustment. Compare multiple zones at once, privately, no account.
Open calculatorCalculatorTip & Bill Split Calculator
Tip calculator and bill split calculator: add a restaurant tip and divide the total evenly or unevenly across any group. Free, private, runs in your browser.
Open calculatorCalculatorTrapezoid Area Calculator
Trapezoid area calculator: area from bases and height. Free trapezoid area calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorTriangle Calculator
Triangle calculator: solve sides, angles, and area from any three known values, including right triangles and Heron's formula. Free, runs in your browser.
Open calculatorCalculatorTrig Calculator
Trig calculator: solve sine, cosine, and tangent values in degrees or radians, with inverse and reciprocal functions. Free, runs locally in your browser.
Open calculatorCalculatorUS Weather Forecast
Official National Weather Service forecast for US latitude and longitude coordinates. Enter exact coords for the authoritative federal NWS forecast, hourly a.
Open calculatorCalculatorUsername Scrambler
Username scrambler: turn your real name into random username ideas and memorable handles instantly. Free, runs locally in your browser, no signup required.
Open calculatorCalculatorVariance Calculator
Variance calculator: compute sample or population variance, standard deviation, and sum of squared deviations from any data set. Free, private, no signup.
Open calculatorCalculatorVoltage Drop Calculator
Voltage drop calculator: find wire voltage drop and end of run voltage from length, current, wire gauge, and material, AC or DC. Free, private, runs locally.
Open calculatorCalculatorVolume Calculator
Volume calculator: compute volume for boxes, cylinders, spheres, cones, and more shapes with formulas shown. Free, runs locally in your browser, no signup.
Open calculatorCalculatorWeather Lookup
Current weather and 10-day forecast for any city worldwide. Temperature, feels-like, precipitation, wind, and UV from Open-Meteo. Private, no account.
Open calculatorCalculatorWeek Number Calculator
Week number calculator: find the ISO week number for any date, plus its week start and end dates. Free, no signup, runs locally in your web browser now.
Open calculatorCalculatorWeekday Calculator
Weekday calculator: instantly find what day of the week any past or future date falls on, no account required. Free, private, runs locally in browser.
Open calculatorCalculatorWeighted Average Calculator
Weighted average calculator: apply the weighted mean formula to grades, scores, or values with custom weights, step by step. Free, no signup, runs locally.
Open calculatorCalculatorZ-Score Calculator
Calculate the z-score (standard score) for a value. Enter the raw score, mean, and standard deviation to see how many SDs above or below the mean it sits.
Open calculatorFinance & Investing 133
1099 Income Tax Calculator
1099 self employment tax calculator: estimate 2026 SECA tax at 15.3% on net self-employment earnings plus a quarterly payment planner. Free, no signup.
Open calculatorCalculator15-Year Mortgage Calculator
Compare a 15-year vs 30-year mortgage: higher monthly payment, dramatically lower total interest, and the payoff savings over the life of the loan.
Open calculatorCalculator401(k) Loan Calculator
Estimate a 401(k) loan: max borrowable, monthly repayment over 5 years, and the opportunity cost of lost market growth while your money is out.
Open calculatorCalculator401k Employer Match Calculator
401k employer match calculator: estimate your contributions, employer match, and unclaimed match you are leaving on the table per paycheck. Free, no signup.
Open calculatorCalculator457(b) Retirement Calculator
Estimate 457(b) plan growth: contributions, employer match, and the penalty-free withdrawal advantage state/local and nonprofit workers get.
Open calculatorCalculator50 30 20 Budget Calculator
50/30/20 budget calculator: split your after-tax income into needs, wants, and savings with exact dollar amounts for each of the three. Free, no signup.
Open calculatorCalculator529 College Savings Calculator
529 college savings calculator: project the future value of your monthly contributions and investment growth toward expected college costs. Free, no signup.
Open calculatorCalculatorAPR & Effective Interest Calculator
APR calculator: convert nominal interest plus fees into fee-adjusted APR and effective interest rate so you can compare true loan cost. Free, no signup.
Open calculatorCalculatorAPY Calculator
APY calculator: convert any nominal rate and compounding frequency into annual percentage yield, with a full frequency comparison table (annual to daily) and one-year interest on your deposit. Free, private, in-browser.
Open calculatorCalculatorAfter Repair Value Calculator
ARV calculator: estimate after repair value from comparable sales per square foot plus renovation scope before you commit to a house flip. Free, no signup.
Open calculatorCalculatorAnnuity Payout Calculator
Annuity payout calculator: convert a lump sum into monthly or yearly income over a fixed term, with editable rates. Free, private, no signup required.
Open calculatorCalculatorArizona Paycheck Calculator
Estimate Arizona state income tax and take-home pay for 2026.
Open calculatorCalculatorAuto Loan Calculator
Auto loan calculator: estimate monthly payment, total interest, and payoff cost from price, down payment, rate, and term. Free, runs locally in your browser.
Open calculatorCalculatorBalance Transfer Savings Calculator
Balance transfer calculator: compare interest saved moving credit card debt to a 0% APR card, transfer fees included. Free, editable rates, no signup.
Open calculatorCalculatorBalloon Payment Calculator
Balloon payment calculator: monthly payment and the final balloon balance from loan amount, APR, term, and balloon month. Free, no signup, runs locally.
Open calculatorCalculatorBoat Loan Calculator
Boat loan calculator with a full amortization schedule: monthly payment, total interest, and payoff date for new or used boats. Free, private, no signup.
Open calculatorCalculatorBreak-Even Ratio Calculator
Break even ratio calculator: find breakeven occupancy for rentals from debt service and operating expenses. Free, private, editable inputs, no signup.
Open calculatorCalculatorBudget Planner Calculator
Budget planner calculator: split monthly income across needs, wants, and savings targets and spot overspending fast. Editable categories, free, no signup.
Open calculatorCalculatorBusiness Loan Calculator
Business loan calculator: monthly payment, total interest, and total cost from loan amount, APR, and term. Free, editable terms, no signup, runs locally.
Open calculatorCalculatorCAGR Calculator
CAGR calculator: convert a start value, end value, and holding years into compound annual growth rate for any investment. Free, private, runs in your browser.
Open calculatorCalculatorCap Rate Calculator
Cap rate calculator: compute the capitalization rate on a rental property from property value and net operating income for unlevered yield. Free, no signup.
Open calculatorCalculatorCapital Gains Calculator
Capital gains calculator: compute profit, short vs long-term treatment, and estimated tax due from purchase price, sale price, and holding period. Editable rates.
Open calculatorCalculatorCash-on-Cash Return Calculator
Cash on cash return calculator: divide annual pre-tax cash flow by total cash invested to gauge rental property return. Editable inputs, free, no signup.
Open calculatorCalculatorChild Care Cost Calculator
Child care cost calculator: compare daycare, nanny, and au pair options by weekly and annual cost per child. Free, editable rates, no signup, runs locally.
Open calculatorCalculatorClosing Cost Calculator
Closing cost calculator: estimate buyer closing costs from price, loan amount, title fees, and escrow before you sign at the table. Free, private, runs locally.
Open calculatorCalculatorCollege Cost Calculator
College cost calculator: project tuition, housing, and fees across all your years of study, with savings and aid gaps made clear. Free, editable rates, no signup.
Open calculatorPopularCalculatorCompound Interest Calculator
Calculate compound interest with recurring contributions. Free compound interest calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorConstruction Loan Calculator
Estimate a construction loan: interest-only payments during the build phase, then the permanent mortgage after your home is complete.
Open calculatorPopularCalculatorCredit Card Payoff Calculator
Credit card payoff calculator: see months to debt freedom and total interest saved at any monthly payment amount you choose. Free, editable rates, no signup.
Open calculatorCalculatorCredit Utilization Calculator
Credit utilization calculator: compute your per-card and overall utilization ratio from balances and limits. Free, private, runs locally in your browser.
Open calculatorCalculatorCrypto Profit Calculator
Crypto profit calculator: compute profit and ROI on your buys and sells, including exchange fees, with the formula shown. Runs in your browser, no signup.
Open calculatorCalculatorDCA Investment Calculator
DCA calculator: dollar cost average your investments and see total shares, average cost basis, and returns across recurring buys. Free, runs in browser.
Open calculatorCalculatorDSCR Calculator
DSCR calculator: divide net operating income by debt service to get the debt service coverage ratio lenders use on rental property loans. Free, no signup.
Open calculatorCalculatorDebt Avalanche Calculator
Debt avalanche calculator orders your debts by interest rate and projects payoff date and total interest saved versus minimums. Editable rates, no signup.
Open calculatorCalculatorDebt Consolidation Calculator
Debt consolidation calculator that compares current debts against one consolidated loan for interest and payoff savings. Free, no signup, runs in your browser.
Open calculatorCalculatorDebt Free Date Calculator
debt free date calculator that projects your payoff date and total interest from balances, rates, and monthly payments. Editable rates, free, no signup required.
Open calculatorCalculatorDebt Payoff Calculator
Debt payoff calculator: see how long a loan or credit card takes to clear and how extra monthly payments cut interest and shorten the payoff date. Free.
Open calculatorCalculatorDebt Snowball Calculator
Debt snowball calculator orders your debts smallest to largest and projects your payoff date, momentum, and interest paid. Editable rates, free, no signup.
Open calculatorCalculatorDebt-to-Income Ratio Calculator
Debt-to-income ratio calculator: compute front end and back end DTI from monthly debt payments and gross income to see what lenders allow. Free, no signup.
Open calculatorCalculatorDimensional Weight Calculator
Calculate dimensional (DIM) weight for shipping — package volume ÷ divisor (166 USPS retail, 139 UPS/FedEx daily) — to find billable weight.
Open calculatorCalculatorDividend Reinvestment Calculator
Dividend reinvestment calculator: model long-term portfolio growth when dividends are reinvested, with yield, growth, and years inputs. Free, no signup.
Open calculatorCalculatorDividend Yield Calculator
Dividend yield calculator: turn a stock price and annual dividend per share into yield, plus income on any invested amount. Free, private, runs in your browser.
Open calculatorCalculatorDown Payment Calculator
Down payment calculator: work out home down payment amount, loan to value, cash to close, and closing costs from your available cash. Free, no signup.
Open calculatorCalculatorEBITDA Calculator
EBITDA calculator: compute earnings before interest, taxes, depreciation, and amortization from revenue, costs, or net income. Free, private, no signup.
Open calculatorCalculatorEOQ Calculator
EOQ calculator: find the economic order quantity that minimizes combined ordering and holding costs, with reorder context. Free, editable rates, no signup.
Open calculatorCalculatorEmergency Fund Calculator
Emergency fund calculator: set your target from monthly expenses, see the gap from current savings, and how long it takes to close it. Free, no signup.
Open calculatorCalculatorEstate Tax Calculator
Estate tax calculator that estimates federal and state estate tax from gross estate, deductions, and exemptions. Free, runs in your browser, no signup.
Open calculatorCalculatorFERS Retirement Calculator
Estimate your Federal Employees Retirement System (FERS) annuity from high-3 average salary and years of service — the OPM formula, including the 1.1% boost at 62.
Open calculatorCalculatorFHA Loan Calculator
FHA loan calculator that computes your monthly payment with MIP, upfront premium, taxes, and insurance included. Free, runs in your browser, no signup.
Open calculatorCalculatorFSA Calculator
FSA calculator estimates your annual tax savings from a flexible spending account using your contribution and tax bracket. Editable rates, free, no signup.
Open calculatorCalculatorFederal Income Tax Calculator
Federal income tax calculator that estimates tax owed by filing status, tax brackets, and standard deductions. Free, private, runs in your browser, no signup.
Open calculatorCalculatorFix and Flip Profit Calculator
Fix and flip profit calculator: estimate house flipping profit, rehab costs, and flip ROI before you buy. Free, editable inputs, runs in your browser.
Open calculatorCalculatorFlorida Paycheck Calculator
Estimate Florida state income tax and take-home pay for 2026.
Open calculatorCalculatorFuture Value Calculator
Future value calculator: project savings growth from deposits, interest rate and compounding frequency over any time span. Editable rates, free, no signup.
Open calculatorCalculatorGDP Calculator
GDP calculator: compute gross domestic product by expenditure or income approach from consumption, investment, and spending. Free, no signup, runs locally.
Open calculatorCalculatorGeorgia Paycheck Calculator
Estimate Georgia state income tax and take-home pay for 2026.
Open calculatorCalculatorGift Tax Calculator
Gift tax calculator: taxable gifts above the annual exclusion and how much lifetime exemption each gift uses. Editable rates, free, no signup, runs locally.
Open calculatorCalculatorGold, Silver & Precious Metals Price Calculator
Gold price calculator: value gold, silver, platinum, and palladium by weight, purity, and current spot price per gram or ounce. Free, editable rates, no signup.
Open calculatorCalculatorGross Margin Calculator
Gross margin calculator: gross margin percentage and markup from revenue and cost of goods sold. Free, private, editable inputs, runs locally in your browser.
Open calculatorCalculatorGross Rent Multiplier Calculator
Gross rent multiplier calculator: compare property price to annual rent with the GRM formula to screen rental real estate deals before touring. Free, no signup.
Open calculatorCalculatorGross Up Calculator
Gross up calculator: convert a net amount into the gross payment needed so taxes leave the recipient with the exact net figure. Editable tax rates, free.
Open calculatorCalculatorHSA Tax Savings Calculator
HSA tax savings calculator estimates federal and FICA tax savings from your HSA contributions across payroll and deduction routes. Editable rates, no signup.
Open calculatorCalculatorIllinois Paycheck Calculator
Estimate Illinois state income tax and take-home pay for 2026.
Open calculatorCalculatorInflation Impact Calculator
Inflation calculator: see how rising prices shrink purchasing power and what goods will cost in the future at your chosen rate. Free, runs in your browser.
Open calculatorCalculatorInterest Only Loan Calculator
Interest only loan calculator: compute monthly payments on interest-only mortgages and the step-up when principal amortization begins. Free, runs in your browser.
Open calculatorCalculatorInterest Rate Calculator
Interest rate calculator that finds the true annual rate implied by loan amount, term, and monthly payment. Free, private, runs in your browser, no signup.
Open calculatorCalculatorInvestment Fee Calculator
Investment fee calculator: show how expense ratios and advisory fees erode portfolio returns over decades, with dollar cost. Free, runs locally, no signup.
Open calculatorCalculatorInvestment Growth Calculator
Investment growth calculator projects your portfolio value from initial deposit, contributions, return rate, and compounding over time. Editable rates, no signup.
Open calculatorCalculatorJumbo Loan Calculator
Estimate a jumbo mortgage payment and compare it to a conforming loan — the high-balance financing for homes above the conforming limit.
Open calculatorCalculatorKentucky Paycheck Calculator
Estimate Kentucky state income tax and take-home pay for 2026.
Open calculatorCalculatorLTL vs FTL Shipping Cost Calculator
Compare less-than-truckload (LTL) vs full-truckload (FTL) freight cost to find the cheaper option and the weight breakpoint.
Open calculatorNewCalculatorLoan Comparison Calculator
Loan comparison calculator: compare monthly payments and total interest across up to three loans side by side. Free, private, runs in your browser, no signup.
Open calculatorCalculatorLoan-to-Value Calculator
Loan-to-value calculator: compute LTV from price, loan amount, and down payment to see PMI thresholds and home equity before refinancing. Free, no signup.
Open calculatorCalculatorLocal Income Tax Calculator
local income tax calculator that estimates city and county income tax owed from your salary, filing status, and local rate. Editable rates, free, no signup.
Open calculatorCalculatorLump Sum Vs Dca Calculator
Lump sum vs DCA calculator: compare investing a windfall all at once against dollar cost averaging over time. Free, runs locally, no signup needed ever.
Open calculatorCalculatorMarket Cap Calculator
Market cap calculator: a company's market capitalization from shares outstanding times the current share price. Free, instant, private, no signup, runs locally.
Open calculatorCalculatorMassachusetts Paycheck Calculator
Estimate Massachusetts state income tax and take-home pay for 2026.
Open calculatorCalculatorMaximum Allowable Offer Calculator
Maximum allowable offer calculator: apply the 70 percent rule to ARV minus repair costs to set a profitable fix and flip offer. Editable, free, no signup.
Open calculatorCalculatorMichigan Paycheck Calculator
Estimate Michigan state income tax and take-home pay for 2026.
Open calculatorCalculatorMoney Market Calculator
See how a money market account grows: APY on your cash, monthly and annual interest, and comparison to a regular savings account.
Open calculatorCalculatorMortgage Affordability Calculator
Mortgage affordability calculator: estimate how much house you can afford from income, debts, and down payment using front-end and back-end DTI. Free.
Open calculatorCalculatorMortgage Escrow Calculator
Mortgage escrow calculator: estimate your monthly escrow payment for property taxes and homeowners insurance with editable rates. Free, private, no signup.
Open calculatorCalculatorMortgage Insurance (PMI) Calculator
Estimate private mortgage insurance (PMI): annual premium on a conventional loan under 20% down, monthly cost, and when it cancels at 80% LTV.
Open calculatorCalculatorMortgage Overpayment Calculator
See how extra monthly payments or a one-time lump sum cut years off a mortgage and save interest. Enter loan, rate, term, and overpayments for a private estimat
Open calculatorCalculatorMortgage Payment Calculator
Estimate your monthly mortgage payment including principal, interest, taxes, and insurance. Enter loan amount, rate, and term for a full breakdown. Private.
Open calculatorCalculatorMortgage Payoff Calculator
Mortgage payoff calculator that shows how extra monthly or lump-sum payments cut years and interest off your loan. Free, no signup, runs in your browser.
Open calculatorCalculatorMortgage Refinance Break-Even Calculator
Mortgage refinance break even calculator: compare closing costs against monthly savings to find when refinancing pays off. Free, editable rates, no signup.
Open calculatorCalculatorNet Operating Income Calculator
Net operating income calculator: compute real estate NOI from rental income and operating expenses with the standard NOI formula. Free, editable inputs.
Open calculatorCalculatorNet Present Value Calculator
Net present value calculator: discount uneven cash flows at your chosen rate to get NPV and an instant accept or reject signal. Free, editable rates, no signup.
Open calculatorCalculatorNevada Paycheck Calculator
Estimate Nevada state income tax and take-home pay for 2026.
Open calculatorCalculatorNew Jersey Paycheck Calculator
Estimate New Jersey state income tax and take-home pay for 2026.
Open calculatorCalculatorNew York Paycheck Calculator
Estimate New York state income tax and take-home pay for 2026.
Open calculatorCalculatorNorth Carolina Paycheck Calculator
Estimate North Carolina state income tax and take-home pay for 2026.
Open calculatorCalculatorOhio Paycheck Calculator
Estimate Ohio state income tax and take-home pay for 2026.
Open calculatorCalculatorPE Ratio Calculator
PE ratio calculator: compute price to earnings ratio from any stock price and EPS to quickly gauge valuation. Free, private, runs in your browser, no signup.
Open calculatorPopularCalculatorPaycheck After Tax Calculator
paycheck after tax calculator that estimates take-home pay from salary with federal brackets, FICA, and state withholding. Editable rates, free, no signup.
Open calculatorCalculatorPayout Ratio Calculator
Payout ratio calculator: compute dividend payout ratio from dividends and earnings, or dividends per share, with retention rate. Free, runs locally, no signup.
Open calculatorCalculatorPennsylvania Paycheck Calculator
Estimate Pennsylvania state income tax and take-home pay for 2026.
Open calculatorPopularCalculatorPercentage Calculator
Calculate percentages, increases, and changes instantly. Free percentage calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPersonal Loan Calculator
Personal loan calculator that computes monthly payments, total interest, and payoff date from amount, rate, and term. Free, runs in your browser, no signup.
Open calculatorCalculatorPrice-to-Rent Ratio Calculator
Price to rent ratio calculator: compare home price with annual rent to read buy vs rent market signals. Editable rates, free, runs locally in your browser.
Open calculatorCalculatorReal Estate Cash Flow Calculator
Real estate cash flow calculator: subtract mortgage, operating expenses, and vacancy from rental income to get monthly cash flow per property. Free, no signup.
Open calculatorNewCalculatorRent Affordability Calculator
Rent affordability calculator: find max rent by income using the 30% rule, debt, and rent-to-income ratio. Free, private, runs in your browser, no signup.
Open calculatorCalculatorRent Split Calculator
Rent split calculator: divide rent fairly by room size, income or even shares, with each roommate paying their exact amount. Free, runs locally, no signup.
Open calculatorCalculatorRent vs Buy Calculator Australia
Australia rent vs buy calculator: compares buying, renting, and rent-vesting with state stamp duty, first home concessions, FHOG, and 2027 capital gains tax rules. Free, no signup.
Open calculatorCalculatorRent vs. Buy Calculator
Rent vs buy calculator: compare monthly renting costs against owning a home including mortgage, taxes, and upkeep to find your break-even point. Free, no signup.
Open calculatorCalculatorRent-to-Value Calculator
Rent to value calculator: check monthly rent against property value with the 1 percent rule for rentals. Free, private, runs in your browser, no signup.
Open calculatorCalculatorRental Property ROI Calculator
Rental property ROI calculator: combine rental cash flow, expenses, and property appreciation into total return on investment. Free, editable rates, no signup.
Open calculatorCalculatorRental Yield Calculator
Rental yield calculator: compute gross rental yield from annual rent and property price using the standard yield formula. Free, private, runs in your browser.
Open calculatorCalculatorRetirement Planning Calculator
Retirement calculator: project savings growth, withdrawals, and income from your balance, contributions, and retirement age. Free, private, no signup required.
Open calculatorCalculatorRetirement Withdrawal Calculator
Retirement withdrawal calculator: project how long savings last given balance, withdrawal rate, returns and inflation. Free, private, runs in your browser.
Open calculatorCalculatorReturn on Investment Calculator
Return on investment calculator: compute ROI percentage and net profit from cost and returns for any project or asset. Free, private, runs in your browser.
Open calculatorCalculatorRule of 72 Calculator
Rule of 72 calculator shows how many years it takes to double your money at any return rate, plus the exact figure for comparison. Free, runs in your browser.
Open calculatorCalculatorSalary Raise Calculator
Pay raise calculator: convert a raise percentage or new salary into hourly, weekly, and annual pay, and compare your before and after income. Free, no signup.
Open calculatorCalculatorSales Tax Calculator
Sales tax calculator: add or remove sales tax from any price using state, county and city combined rates. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSales Tax by ZIP Code
Sales tax by ZIP code: see the candidate states, base rate, and local rate ceiling for any US ZIP before estimating tax due. Free, private, no signup.
Open calculatorCalculatorSavings Goal Calculator
Savings goal calculator: find the monthly deposit or timeline needed to hit a savings target with compound interest. Free, editable rates, runs locally.
Open calculatorCalculatorSavings Growth Calculator
Savings calculator: project how much your savings will grow with compound interest, deposits, and time to reach a future value. Free, runs in your browser.
Open calculatorCalculatorShare Profit Calculator
Stock profit calculator: compute gain or loss, ROI, and total return on your share trades including fees. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSocial Security Break Even Calculator
Social security break even calculator: find the exact age where early versus delayed claiming pays more, with lifetime totals. Free, runs in your browser.
Open calculatorCalculatorSocial Security Tax Calculator
Social Security tax calculator: compute FICA and SECA tax owed from salary or self-employment income, wage base included. Free, editable rates, no signup.
Open calculatorCalculatorStock Average Cost Calculator
Stock average cost calculator: compute weighted average share price, total shares, cost basis, and unrealized gain from your buys. Free, private, no signup.
Open calculatorCalculatorStock Return Calculator
Stock return calculator: measure total return and annualized CAGR from buy price, sell price, dividends paid, and holding period. Free, editable rates, no signup.
Open calculatorCalculatorStudent Loan Payoff Calculator
Student loan payoff calculator: see how extra payments cut interest and shorten your student loan repayment timeline. Free, editable rates, no signup.
Open calculatorCalculatorSubscription Cost Calculator
Subscription cost calculator: total monthly and annual spend across all your subscriptions and spot the costliest ones. Free, editable rates, no signup.
Open calculatorCalculatorT-Bill Yield Calculator
T bill yield calculator: convert T-bill discount price to bank discount, coupon equivalent, and investment yield. Free, no signup, runs in your browser.
Open calculatorCalculatorTennessee Paycheck Calculator
Estimate Tennessee state income tax and take-home pay for 2026.
Open calculatorCalculatorTerm Life Insurance Calculator
Term life insurance calculator: estimate the coverage your family needs using the DIME method for debts, income, mortgage, and education. Free, no signup.
Open calculatorCalculatorUnit Price Calculator
Unit price calculator: price per unit, ounce, or gram so you can compare package sizes and find the real deal. Free, private, in your browser, no signup.
Open calculatorCalculatorVA Mortgage Calculator
Free VA mortgage calculator: monthly payment with the 2026 VA funding fee included, zero PMI. Compare first-use, down-payment and IRRRL scenarios instantly.
Open calculatorCalculatorVacancy Rate Impact Calculator
Vacancy rate calculator: stress test how vacancy impacts rental cash flow and lost rent each year. Free, editable rates, runs in your browser, no signup.
Open calculatorCalculatorWash Sale Calculator
Wash sale calculator that computes disallowed losses and adjusted cost basis across buy and sell dates. Free, private, runs in your browser, no signup.
Open calculatorCalculatorWisconsin Paycheck Calculator
Estimate Wisconsin state income tax and take-home pay for 2026.
Open calculatorFood & Cooking 33
Air Fryer Time Calculator
Air fryer time calculator: pick a food preset to get air fryer temperature and cook time, plus the oven-to-air-fryer adjustment. Free, no signup.
Open calculatorCalculatorAlcohol Dilution Calculator
Alcohol dilution calculator: work out exactly how much water to add to reach a target ABV percentage from any starting strength. Free, runs locally, no signup.
Open calculatorCalculatorBaking Ratio Calculator
Baking ratio calculator: scale flour, water, fat, and sugar ratios to any batch size so recipes work at every pan size. Editable ratios, runs in your browser.
Open calculatorCalculatorBeer ABV Calculator
Beer ABV calculator: convert original and final gravity readings into alcohol by volume and apparent attenuation. Editable formula, free, runs in your browser.
Open calculatorCalculatorCaffeine Intake Calculator
Caffeine intake calculator: track daily caffeine from coffee, tea, soda, and energy drinks against safe daily limits for your body weight. Free, no signup.
Open calculatorCalculatorCandy Temperature Calculator
Candy temperature calculator: adjust sugar stage temperatures, from thread to hard crack, for your altitude and elevation. Free, private, runs in your browser.
Open calculatorCalculatorCoffee Cost Calculator
Coffee cost calculator: compare home brewing versus cafe spending by cups, price, and equipment to find yearly savings. Free, editable rates, no signup.
Open calculatorCalculatorCoffee Ratio Calculator
Coffee ratio calculator: grams of coffee for water and ratio. Free coffee ratio calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCooking Time Calculator
Cooking time calculator: convert oven temperatures, pan sizes, and weights into adjusted cook times for meat and roasts. Free, runs locally, no signup.
Open calculatorCalculatorEgg Boil Time Calculator
Egg boil time calculator: doneness from boiling minutes. Free egg boil time calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorFood Cost Calculator
Food cost calculator: compute per-serving and per-recipe costs from ingredient prices, then set menu prices that protect your margin. Free, runs locally.
Open calculatorCalculatorFood Safety Temperature Calculator
Food safety temperature calculator: convert safe internal cooking temperatures between Fahrenheit and Celsius by food type. Free, no signup, runs in browser.
Open calculatorCalculatorFood Storage Time Calculator
Food storage time calculator: check how long food stays safe in the fridge, freezer, or pantry before quality drops, then plan use-by dates. Free, no signup.
Open calculatorCalculatorGrams to Cups Calculator
Grams to cups calculator: convert flour, sugar, butter, and liquids by ingredient density for accurate baking results. Free, private, runs in your browser.
Open calculatorCalculatorKombucha Brew Calculator
Kombucha brew calculator: tea, sugar and starter for a batch. Free kombucha brew calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorMeal Prep Calculator
meal prep calculator that computes batch quantities, per-serving portions, and weekly grocery totals from your recipe. Free, runs in your browser, no signup.
Open calculatorCalculatorMeat Cooking Time Calculator
Meat cooking time calculator: estimate roast time by weight, cut and target internal temperature, plus rest time. Free, runs in your browser, no signup.
Open calculatorCalculatorMeat Doneness Temperature Calculator
Meat doneness temperature calculator: get safe internal temps for every meat and doneness level, from rare to well done. Free, private, runs in your browser.
Open calculatorCalculatorNet Carbs Calculator
Net carbs calculator: carbs minus fiber and sugar alcohols. Free net carbs calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorOven Conversion Calculator
Oven conversion calculator: conventional to convection. Free oven conversion calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorOven Temperature Converter
Oven temperature converter translates Fahrenheit, Celsius, and gas mark settings for recipes from any country. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPizza Dough Calculator
Pizza dough calculator: compute exact flour, water, salt, and yeast weights from batch count and hydration percentage. Free, editable rates, no signup.
Open calculatorCalculatorPortion Size Calculator
Portion size calculator: scale servings and ingredient portions for any recipe or meal plan. Free, editable inputs, runs locally in your browser, no signup.
Open calculatorCalculatorPressure Cooker Time Calculator
Pressure cooker time calculator: pick a food and weight to get minutes per pound with release tips. Free, no signup.
Open calculatorCalculatorRecipe Divider Calculator
Recipe divider calculator: scale recipe ingredients up or down by servings while keeping ratios intact. Free, runs in your browser, no signup required.
Open calculatorCalculatorRice Water Ratio Calculator
Rice water ratio calculator: water per cup of rice by type. Free rice water ratio calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorSmoker Time Calculator
smoker time calculator that estimates total cook time and when to start for brisket, pork butt, and ribs by weight and smoker temperature. Free, no signup.
Open calculatorCalculatorSoup Scale Calculator
Soup scale calculator: scale soup recipes up or down from any batch size, recalculating every ingredient so flavors stay perfectly balanced. Free, no signup.
Open calculatorCalculatorSourdough Hydration Calculator
Sourdough hydration calculator: compute exact flour and water ratios, starter included, for any dough weight. Editable rates, free, runs in your browser.
Open calculatorCalculatorSous Vide Time Calculator
Sous vide time calculator: cooking time by cut and thickness. Free sous vide time calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorSteak Doneness Calculator
Steak doneness calculator: internal temperature guide. Free steak doneness calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorTea Steep Calculator
Tea steep calculator: water temperature and time by tea type. Free tea steep calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorTsp to Tbsp Converter
Tsp to tbsp converter: teaspoons, tablespoons, cups, ml. Free tsp to tablespoon converter with the formula shown - runs entirely in your browser, no signup.
Open calculatorGaming 15
Betting Odds Converter
Betting odds converter that switches decimal, fractional, and American odds into implied probability instantly. Free, private, runs in your browser, no signup.
Open calculatorCalculatorChess Elo Calculator
Chess Elo calculator: predict your new rating after games using Elo, expected score, and K-factor, or find performance rating. Free, private, no signup.
Open calculatorCalculatorDPS Calculator
DPS calculator: compute damage per second from damage, attacks per second, crit rate, and crit damage to compare weapons. Free, runs in your browser, no signup.
Open calculatorCalculatorFPS Sensitivity Converter
FPS sensitivity converter: translate mouse sensitivity and DPI between Valorant, CS2, Apex, and more for identical aim. Free, private, no signup, runs locally.
Open calculatorCalculatorGacha Pity Calculator
Gacha pity calculator: estimate pulls needed to hit pity or a target rarity from base rates and soft pity mechanics. Free, private, runs in your browser.
Open calculatorCalculatorKD Ratio Calculator
KD ratio calculator: compute your kill/death ratio and KDA from kills, deaths, and assists, and see targets to improve. Free, runs locally, no signup.
Open calculatorCalculatorKelly Criterion Calculator
Kelly criterion calculator that computes optimal bet sizing from your win probability, payoff odds, and bankroll. Free, private, runs in your browser, no signup.
Open calculatorCalculatorLoot Box EV Calculator
Loot box EV calculator: enter drop rates and item values to see the expected cost per pull before you spend. Free, private, runs in your browser, no signup.
Open calculatorCalculatorLoot Drop Probability Calculator
Loot drop probability calculator: find the chance of rare drops and expected attempts for any drop rate. Free, private, runs in your browser, no signup.
Open calculatorCalculatorLottery Odds Calculator
Lottery odds calculator: compute exact jackpot and prize-tier odds for Powerball, Mega Millions, and custom number pools. Free, private, no signup needed.
Open calculatorCalculatorParlay Odds Calculator
Parlay odds calculator that combines multiple leg odds into total payout, including American odds and implied probability. Free, runs in your browser.
Open calculatorCalculatorRaffle Odds Calculator
Raffle odds calculator: your exact win probability from the tickets you hold versus total tickets sold, one or more prizes. Free, private, runs in your browser.
Open calculatorCalculatorWin Streak Probability Calculator
Win streak probability calculator: work out the odds of winning streaks of any length from your win rate. Free, private, runs in your browser, no signup.
Open calculatorCalculatorXP Level Calculator
XP level calculator: convert total experience points into level, or find XP needed to reach your next level in any game. Free, runs locally, no signup.
Open calculatorCalculatorXP to Level Calculator
XP to level calculator: convert total experience points into character level and XP needed for the next one in D&D 5e. Free, private, runs in your browser.
Open calculatorGenerators 11
Business Name Generator
Business name generator: create brandable company and startup name ideas from your keyword, with short, domain-friendly options for any niche. Free, no signup.
Open generatorGeneratorChinese Zodiac and Element Calculator
Chinese zodiac animal calculator: find your animal sign, year element, and polarity from the 12-year and 10-year cycles. Free, private, runs in your browser.
Open generatorGeneratorDad Joke Generator
Dad joke generator: pull random dad jokes, puns, and funny one liners whenever you need a good groan worthy line for any conversation. Free, no signup.
Open generatorGeneratorLogarithm Calculator
Logarithm calculator: evaluate log base 10, natural log, or any custom base, with step-by-step conversion to exponential form. Free, runs in your browser.
Open generatorGeneratorPayment Terms Generator
Payment terms generator: create clear invoice payment terms and templates for freelancers, from Net 30 to deposits and late fees. Free, no signup required.
Open generatorGeneratorProduct Description Generator
Product description generator: turn product features, benefits, and tone choices into ready-to-use ecommerce copy for any online listing. Free, no signup.
Open generatorGeneratorQR Code Generator
QR code generator: make free QR codes for links, plain text, WiFi, and contact cards with instant PNG download. Runs locally in your browser, no signup.
Open generatorGeneratorQuote / Estimate Generator
Quote estimate generator: build a free service quote or estimate with line items, labor, and tax, then print or save as a PDF. Free, no signup required.
Open generatorGeneratorRandom Quote Generator
Random quote generator: draw motivational, famous, and inspirational quotes instantly for posts, speeches, or daily quotes. Free, runs in your browser, no signup.
Open generatorGeneratorReceipt Generator
Receipt generator: create a printable payment receipt from itemized lines, tax, and totals. Free receipt maker, no signup, everything stays on your device.
Open generatorGeneratorSlogan Generator
Slogan generator: create brand slogans, taglines, and marketing lines from your product name and keywords. Free, runs locally in your browser, no signup.
Open generatorGeography 10
Atmospheric Pressure Calculator
Atmospheric pressure calculator: compute air pressure at any altitude using barometric formulas. Free, editable units, runs in your browser, no signup.
Open calculatorCalculatorBearing Calculator
Bearing calculator: initial compass bearing between two coordinates. Free bearing calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCoordinate Converter
Coordinate converter: switch latitude and longitude between decimal degrees and degrees minutes seconds format. Free, private, runs locally, no signup needed.
Open calculatorCalculatorDistance Between Coordinates Calculator
Distance between coordinates calculator: measure the miles or km between two GPS points using the haversine formula. Free, runs locally in your browser.
Open calculatorCalculatorGeographic Area Calculator
Geographic area calculator: compute the area of any region from shape dimensions, coordinates or vertices. Free, runs locally in your browser, no signup.
Open calculatorCalculatorGrowing Degree Day Calculator
Growing degree day calculator: accumulate GDD for crops at any base temperature, plus heating and cooling degree days at 65F. Free, private, runs in your browser.
Open calculatorCalculatorHumidity Index Calculator
Humidity index calculator: convert air temperature and relative humidity into the apparent heat index you actually feel outdoors. Free, private, no signup.
Open calculatorCalculatorPopulation Density Calculator
Population density calculator: divide population by land area to get people per square mile or km instantly. Free, editable units, runs locally, no signup.
Open calculatorCalculatorWet Bulb Temperature Calculator
Wet bulb temperature calculator: compute wet bulb from air temperature, humidity and pressure, with heat stress risk levels. Free, runs in your browser.
Open calculatorCalculatorWind Chill Calculator
Wind chill calculator: convert air temperature and wind speed into how cold it actually feels on exposed skin outdoors. Free, private, runs in your browser.
Open calculatorHealth 64
A1c Calculator
A1c calculator: convert your average blood glucose reading into an estimated hemoglobin A1c percentage instantly. Free, runs locally in your browser, no signup.
Open calculatorCalculatorBMI Calculator
bmi calculator that computes body mass index from height and weight, with healthy ranges by age for men and women. Free, private, runs locally in your browser.
Open calculatorCalculatorBMR & TDEE Calculator
BMR and TDEE calculator: estimate your basal metabolic rate and daily calorie needs with the Mifflin St Jeor formula. Free, private, runs in your browser.
Open calculatorCalculatorBaby Formula Calculator
Baby formula calculator: estimate daily formula ounces, feeds, and scoops by your baby's weight and age. Free, private, runs in your browser, no signup.
Open calculatorCalculatorBlood Alcohol Content Calculator
Blood alcohol content calculator: estimate BAC from drinks, body weight, sex, and elapsed time using the Widmark formula. Free; do not drive after drinking.
Open calculatorCalculatorBlood Pressure Category Calculator
Blood pressure calculator: read your systolic and diastolic numbers and see your AHA category, from normal to hypertensive crisis. Free, runs in your browser.
Open calculatorCalculatorBlood Sugar Converter
Blood sugar converter: switch glucose readings between mg/dL and mmol/L instantly, with a quick reference chart. Free, private, runs locally, no signup.
Open calculatorCalculatorBody Fat Estimate Calculator
Body fat calculator: estimate your body fat percentage from simple body measurements using the US Navy method, with lean mass. Free, private, no signup.
Open calculatorCalculatorBody Surface Area Calculator
Body surface area calculator: compute BSA from height and weight using Du Bois, Mosteller, and other standard formulas used in dosing. Free, no signup.
Open calculatorCalculatorBra Size Calculator
Bra size calculator that converts your band and bust measurements into sister sizes across US, UK, and EU charts. Free, runs in your browser, no signup.
Open calculatorCalculatorCaffeine Half-Life Calculator
Caffeine half-life calculator: track how much caffeine remains in your body hour by hour so you can time your last coffee and protect your sleep. Free, no signup.
Open calculatorCalculatorCalorie Calculator
calorie calculator that estimates daily calorie needs and macros from age, weight, and activity level using Mifflin-St Jeor. Free, runs locally, no signup.
Open calculatorCalculatorCalorie Deficit Calculator
Calorie deficit calculator: set a goal weight and date and get your daily calorie target plus expected weekly loss. Free, private, no signup required.
Open calculatorCalculatorCalorie Target Calculator
Calorie target calculator: get daily calories for cutting, maintaining, or bulking from your stats and activity level. Free, runs in your browser, no signup.
Open calculatorCalculatorCholesterol Ratio Calculator
Cholesterol ratio calculator: compute total cholesterol to HDL, LDL to HDL, and triglyceride ratios from your lab panel. Free, private, runs in your browser.
Open calculatorCalculatorConception Calculator
Conception calculator that estimates your conception date and fertile window from a due date or last period. Free, private, runs in your browser, no signup.
Open calculatorCalculatorCycling Calories Calculator
Cycling calories calculator estimates calories burned per ride using your weight, speed and duration. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorDaily Water Intake Calculator
Daily water intake calculator: estimate how much water you need per day from weight, activity, and climate. Free, private, no signup, runs in your browser.
Open calculatorCalculatorDog Chocolate Toxicity Calculator
Estimate chocolate toxicity risk for dogs: theobromine dose from chocolate type and weight, compared to toxic thresholds. Always consult a vet.
Open calculatorCalculatorFasting Window Calculator
Fasting window calculator: plan 16:8, 18:6, and custom intermittent fasting schedules from your last meal and wake time. Free, runs locally, no signup.
Open calculatorCalculatorFetal Weight Calculator
Fetal weight calculator estimates your baby's weight from ultrasound measurements like BPD, HC, AC and FL. Free, runs locally in your browser, no signup.
Open calculatorCalculatorFrame Size Calculator
Frame size calculator: find your ideal bike frame size from your height and inseam for a comfortable, efficient fit. Free, private, runs in your browser.
Open calculatorCalculatorGFR Calculator
GFR calculator: estimate glomerular filtration rate from serum creatinine, age, and sex using the CKD-EPI equation. Free, private, no signup, in your browser.
Open calculatorCalculatorGestational Age Calculator
Gestational age calculator: compute pregnancy weeks and days from LMP or due date, with trimester dates included. Free, private, runs in your browser.
Open calculatorCalculatorGym Cost Per Visit Calculator
Gym cost per visit calculator divides your monthly membership, sign-up fees, and annual costs by how often you actually go. Free, editable rates, no signup.
Open calculatorCalculatorHeart Rate Recovery Calculator
heart rate recovery calculator that measures HRR from peak and one-minute recovery pulse and flags healthy ranges by age. Free, runs locally, no signup.
Open calculatorCalculatorHeart Rate Zones Calculator
Heart rate zones calculator: turn your age or max heart rate into five training zones with target bpm ranges for every workout intensity. Free, no signup.
Open calculatorCalculatorIdeal Weight Calculator
Ideal weight calculator by height: compare the Devine, Robinson, Hamwi, and Miller formulas side by side and see why they disagree. Free, runs in your browser.
Open calculatorCalculatorIntermittent Fasting Calculator
Intermittent fasting calculator: pick 16:8, 18:6, or OMAD and get your eating window, fasting schedule, and daily calorie target. Free, runs locally, no signup.
Open calculatorCalculatorLean Body Mass Calculator
Lean body mass calculator estimates fat-free mass from your weight, height, gender and body fat. Free, private, runs in your browser, no signup required.
Open calculatorCalculatorMacro Planning Calculator
Macro calculator: turn your daily calorie target into protein, fat, and carb gram targets for meal planning. Editable ratios, free, runs in your browser.
Open calculatorCalculatorMacro Split Calculator
Macro split calculator: convert daily calories and your goal into protein, carb, and fat gram targets for cutting, maintaining, or bulking. Free, no signup.
Open calculatorCalculatorMaintenance Calories Calculator
Maintenance calories calculator: compute your daily calories to maintain weight from age, height, weight, and activity level. Free, private, no signup.
Open calculatorCalculatorMean Arterial Pressure Calculator
Mean arterial pressure calculator: compute MAP from systolic and diastolic readings using (SBP + 2xDBP) / 3, and check the normal range. Free, private.
Open calculatorCalculatorMedicine Dosage Calculator
Medicine dosage calculator: convert weight-based pediatric doses into accurate mL or mg amounts, with per-day checks. Free, private, runs in your browser.
Open calculatorCalculatorMenstrual Cycle Calculator
Menstrual cycle calculator predicts your next period, fertile window, and ovulation from your cycle length and last period date. Private, runs locally, no signup.
Open calculatorCalculatorMetabolic Age Calculator
Metabolic age calculator: compare your BMR to age-based averages to estimate your body's metabolic age. Free, runs locally in your browser, no signup.
Open calculatorCalculatorPace Calculator
Running pace calculator: convert race time and distance into pace per km or mile, and predict marathon or 5K finish times. Free, private, no signup required.
Open calculatorCalculatorPeriod Cycle Calculator
Period cycle calculator: track your cycle length and predict your next period, fertile window, and ovulation day from your last period dates. Free, no signup.
Open calculatorCalculatorPollen Forecast Calculator
Pollen forecast calculator: see expected tree, grass and weed pollen levels by month for your region and plan allergy meds. Free, runs in your browser.
Open calculatorCalculatorPregnancy Calculator
Pregnancy calculator: find your due date, current week of pregnancy, and estimated conception date from your last period. Free, in your browser, no signup.
Open calculatorCalculatorPregnancy Due Date Calculator
Pregnancy due date calculator: estimate your due date from your last period or conception date, plus current week and trimester. Free, runs in your browser.
Open calculatorCalculatorPregnancy Weight Gain Calculator
Pregnancy weight gain calculator: see your recommended weekly and total gain ranges by pre-pregnancy BMI and trimester, per IOM. Free, runs locally, no signup.
Open calculatorCalculatorProtein Shake Calculator
protein shake calculator that sizes scoops, calories, and daily protein intake against your body weight and training goals. Free, private, runs in your browser.
Open calculatorCalculatorPulse Pressure Calculator
Pulse pressure calculator: subtract diastolic from systolic blood pressure and flag wide or narrow pulse ranges. Free, private, runs locally, no signup.
Open calculatorCalculatorSensitivity Specificity Calculator
Sensitivity specificity calculator: compute sensitivity, specificity, PPV and NPV from any 2x2 confusion matrix. Free, runs in your browser, no signup.
Open calculatorCalculatorSleep Cycle Calculator
Sleep cycle calculator: find the best bedtime or wake time so you complete full 90-minute sleep cycles and wake up refreshed. Free, private, no signup.
Open calculatorCalculatorSleep Cycle Calculator
Sleep cycle calculator finds the best bedtime or wake time based on 90-minute sleep cycles so you wake up feeling rested. Free, private, runs locally, no signup.
Open calculatorCalculatorSleep Debt Calculator
Sleep debt calculator: compare your actual nightly sleep against your personal sleep need over a week and see hours owed plus recovery time. Free, private.
Open calculatorCalculatorSleep Length Calculator
Sleep length calculator: see how many hours and sleep cycles you get between your bedtime and alarm, and when to sleep to hit your goal. Free, runs locally.
Open calculatorCalculatorSodium Calculator
Sodium calculator: total sodium and salt intake from serving sizes and milligrams per serving, checked against daily limits. Free, private, runs in your browser.
Open calculatorCalculatorSteps to Miles Calculator
Steps to miles calculator: convert your daily step count into miles or kilometers using your height and stride length. Free, private, no signup, runs locally.
Open calculatorCalculatorStride Length Calculator
Stride length calculator: measure your walking or running stride length from height or counted steps for accurate distance. Free, runs locally, no signup.
Open calculatorCalculatorSugar in Drinks Calculator
Sugar in drinks calculator: total grams and teaspoon counts from drink volume and sugar per 100ml, across bottles or cans. Free, private, runs in your browser.
Open calculatorCalculatorSunscreen SPF Calculator
Sunscreen SPF calculator: estimate time to sunburn and reapplication intervals from SPF rating, skin type, and UV index. Free, editable inputs, no signup.
Open calculatorCalculatorSwimming Calories Calculator
Swimming calories calculator: compute calories burned per session from stroke type, duration, and your body weight. Editable MET values, free, private.
Open calculatorCalculatorUV Exposure Calculator
UV exposure calculator that estimates safe sun exposure time from the UV index and your skin type before you go outside. Free, no signup, runs in your browser.
Open calculatorCalculatorVO2 Max Calculator
VO2 max calculator: estimate your aerobic fitness from a resting heart rate, run time, or walk test and see your fitness age and rating. Free, private.
Open calculatorCalculatorVO2 Max Calculator
VO2 max calculator: estimate your maximal oxygen uptake from resting heart rate, age, and fitness level for training zones. Free, runs locally, no signup.
Open calculatorCalculatorVitamin D Calculator
Vitamin D calculator: convert IU doses to daily or weekly amounts and estimate levels from your inputs. Free, runs locally, editable defaults, no signup.
Open calculatorCalculatorWaist Hip Ratio Calculator
Waist hip ratio calculator: compute your WHR from waist and hip measurements and see the WHO health risk band it falls in. Free, private, runs locally, no signup.
Open calculatorCalculatorWaist to Height Ratio Calculator
Waist to height ratio calculator: divide waist circumference by height to assess central fat health risk. Instant result, no signup, private, free in browser.
Open calculatorCalculatorWalking Calories Calculator
Walking calories calculator: estimate calories burned on any walk from distance, pace, terrain, and body weight. Free, private, in-browser, no signup.
Open calculatorCalculatorWeight Loss Timeline Calculator
Weight loss timeline calculator: project weekly weight change and goal date from current weight, deficit, and activity. Editable rates, free, runs locally.
Open calculatorMusic & Audio 14
Audio File Size Calculator
Audio file size calculator: estimate WAV, FLAC, or MP3 storage requirements from sample rate, bit depth, channels, and track length. Free, private, no signup.
Open calculatorCalculatorAudio Time Stretch Calculator
Audio time stretch calculator: compute the new duration or tempo ratio when changing playback speed without shifting pitch. Free, private, runs locally.
Open calculatorCalculatorBPM to MS Calculator
BPM to ms calculator: convert beats per minute into milliseconds for every note division, so your delay and LFO times lock to tempo. Free, runs in your browser.
Open calculatorCalculatorChord Progression Generator
Chord progression generator: build chord sequences in any key and scale, with roman numerals and audio playback. Free, private, runs in your browser, no signup.
Open calculatorCalculatorDelay Time Calculator
Delay time calculator: convert BPM into note-length delay times in milliseconds for quarter, eighth, dotted, and triplet settings. Free, runs locally, no signup.
Open calculatorCalculatorEqualizer Q Calculator
Equalizer Q calculator: convert EQ bandwidth and octave width into Q factor for precise filter settings on any mixing console or plugin. Free, no signup.
Open calculatorCalculatorFrequency to Note Converter
Frequency to note converter: turn any Hz value into its musical note plus cents detuning from pitch. Free tuner helper, private, runs in your browser.
Open calculatorCalculatorKey Transposition Calculator
Transpose key calculator: move chords, scales and guitar capo positions between any key by semitone, with note mapping and capo fret shown. Free, private.
Open calculatorCalculatorMetronome BPM Calculator
Metronome BPM calculator: convert tempo markings like allegro or largo into exact BPM ranges and back. Free tool, private, runs locally, no signup needed.
Open calculatorCalculatorMusic Interval Calculator
Music interval calculator: name the interval between any two notes or frequencies in semitones, quality and enharmonic names. Free, runs locally, no signup.
Open calculatorCalculatorScale Finder Calculator
Scale finder calculator: get the notes for major, minor, pentatonic, and mode scales from any root note for songwriting. Free, private, runs in your browser.
Open calculatorCalculatorTempo Change Calculator
Tempo change calculator: find the new BPM after a percent change, or the exact percent shift needed to match a target tempo or key. Free, runs locally.
Open calculatorCalculatorVinyl RPM Calculator
Vinyl RPM calculator: find pitch change and speed error for 33, 45, and 78 RPM records at any turntable pitch setting. Free, runs locally in browser, no signup.
Open calculatorCalculatordB to Volume Ratio Calculator
dB to volume calculator: convert decibels to power and amplitude ratios, where a 10 dB change is about twice the perceived loudness. Free, private, no signup.
Open calculatorPets 9
Aquarium Stocking Calculator
Aquarium stocking calculator: fish capacity by tank size. Free aquarium stocking calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCat Age Calculator
Cat age calculator: convert your cat's age into human years by life stage, from kitten to senior, with instant results. Free, private, runs in your browser.
Open calculatorCalculatorCat Food Calculator
Cat food calculator: daily calories and cups from cat weight. Free cat food calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCat Litter Calculator
Cat litter calculator: litter needed for a multi-cat home. Free cat litter calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorDog Food Calculator
Dog food calculator: daily calories and cups from dog weight. Free dog food calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPet Annual Cost Calculator
Pet annual cost calculator: yearly dog or cat expenses. Free pet annual cost calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPuppy Adult Weight Calculator
Puppy adult weight calculator: predict your puppy's grown weight from current age, weight, and breed size category. Free, runs in your browser, no signup.
Open calculatorCalculatorPuppy Age Calculator
Dog age calculator: dog years to human years (AAHA method). Free puppy age calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPuppy Breed Size Calculator
Puppy breed size calculator: adult weight by breed category. Free puppy breed size calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorPhoto & Video 12
Depth of Field Calculator
Depth of field calculator: compute near limit, far limit, and hyperfocal distance from focal length, aperture, and subject distance. Editable lens data, free.
Open calculatorCalculatorExposure Value Calculator
Exposure value calculator: combine aperture, shutter speed, and ISO into EV stops and find equivalent exposure settings for any light. Free, no signup.
Open calculatorCalculatorFlash Guide Number Calculator
Flash guide number calculator: find the right aperture or flash power from guide number and distance for correct exposure. Free, private, runs in your browser.
Open calculatorCalculatorFocal Length Calculator
Focal length calculator: compute lens focal length from object and image distances for cameras and optics. Free, editable units, runs locally in your browser.
Open calculatorCalculatorFrame Rate Duration Calculator
Frame rate calculator: convert between frames, frame rate, and clip duration for 24, 30, 60, and 120 fps video footage. Free, runs locally, no signup.
Open calculatorCalculatorImage File Size Calculator
Image file size calculator: estimate storage requirements from pixel dimensions, bit depth, and compression ratio before you export or upload. Free, no signup.
Open calculatorCalculatorLighting Ratio Calculator
Lighting ratio calculator: convert key and fill light readings into a lighting ratio and see the contrast look it produces. Free, private, runs locally.
Open calculatorCalculatorMacro Magnification Calculator
Macro magnification calculator: work out magnification ratio and working distance from lens, extension tube, and sensor specs. Free, private, no signup.
Open calculatorCalculatorPrint Size Calculator
Print size calculator: convert image pixels to print dimensions at any DPI and check resolution before you order prints. Free, runs locally in your browser.
Open calculatorCalculatorShutter Speed Stops Calculator
Shutter speed stops calculator: convert any shutter speed into full, half, and third stops to nail exposure math for long exposures. Free, runs in browser.
Open calculatorCalculatorTimelapse Calculator
Timelapse calculator: convert shoot interval, clip length and frame rate into total capture time and final video length. Free, runs locally, no signup.
Open calculatorCalculatorVideo File Size Calculator
Video file size calculator: estimate video storage from bitrate, resolution, and duration before you export. Free, editable rates, runs locally in your browser.
Open calculatorPhysics 18
Acceleration Calculator
Calculate acceleration from the change in velocity over time. Free acceleration calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorAngular Momentum Calculator
Angular momentum calculator: compute L = mvr for a point mass from mass, velocity, and radius. Free physics tool, runs locally in your browser, no signup.
Open calculatorCalculatorCylinder Volume Calculator
Cylinder volume calculator: compute volume, surface area, and liquid capacity from radius and height, in any unit. Free, private, runs locally, no signup.
Open calculatorCalculatorDensity Calculator
Calculate density from mass and volume (ρ = m/V) in kg/m³ and g/cm³. Free density calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorForce Calculator
Force calculator: solve F = ma to get force in newtons from mass and acceleration, or solve for mass and acceleration instead. Free, runs in your browser.
Open calculatorCalculatorG Force Calculator
G force calculator: cornering acceleration from speed and radius. Free g force calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorHalf Life Calculator
Half life calculator solves remaining quantity, elapsed time, or half life for decay and drug elimination. Free, private, runs in your browser, no signup.
Open calculatorCalculatorKinetic Energy Calculator
Kinetic energy calculator: apply the 1/2 mv squared formula to find the energy of a moving object from mass and velocity. Free, private, runs locally, no signup.
Open calculatorCalculatorMomentum Calculator
Calculate linear momentum from mass and velocity (p = mv). Free momentum calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPotential Energy Calculator
Potential energy calculator: compute gravitational potential energy with PE = mgh from mass, height, and gravity, in joules or foot pounds. Free, no signup.
Open calculatorCalculatorPressure Calculator
Pressure calculator: apply the P = F/A formula to get pressure in pascal, psi, bar, and atm from force and area inputs. Free, private, runs in your browser.
Open calculatorCalculatorResistor Color Code Calculator
Resistor color code calculator: read color bands into resistance, tolerance, and value ranges for 4, 5, or 6 band resistors. Free, runs locally, no signup.
Open calculatorCalculatorSpeed Distance Time Calculator
Speed distance time calculator solves for any one of speed, distance, or time from the other two, in your chosen units. Free, private, no signup, runs locally.
Open calculatorCalculatorThermal Equilibrium Calculator
Thermal equilibrium calculator: find the final temperature when mixing substances at different temperatures via heat capacity. Editable, free, runs locally.
Open calculatorCalculatorVelocity Calculator
Velocity calculator: compute average velocity from distance and time, or solve the velocity formula for any missing variable. Free, no signup, in your browser.
Open calculatorCalculatorWave Calculator
Wave calculator: solve wave speed from frequency and wavelength with v = fλ, formula shown and a worked example. Runs entirely in your browser, no signup.
Open calculatorCalculatorWork Calculator
Work calculator: compute physics work W = force x distance, including angled force and joules conversions. Free, runs locally in your browser, no signup.
Open calculatorCalculatorWork and Power Calculator
Work and power calculator: compute mechanical work (W = F·d) and power output (P = W/t) instantly, with the formula shown. Runs in your browser, no signup.
Open calculatorReal Estate 11
1031 Exchange Calculator
1031 exchange calculator: estimate deferred capital gains tax, boot and replacement property value for like-kind exchanges. Free, runs in your browser.
Open calculatorCalculatorDSCR Calculator
DSCR calculator: compute debt service coverage ratio from net operating income and annual debt payments for lenders. Free, private, runs in your browser.
Open calculatorCalculatorHome Equity Calculator
Home equity calculator: estimate your available equity and cash-out amount from home value, mortgage balance, and lender LTV limits. Free, editable rates.
Open calculatorCalculatorMarket Value Calculator
Market value calculator: estimate a property's market value from comparable sales price per square foot with quality adjustments. Free, private, no signup.
Open calculatorCalculatorProperty Area Calculator
Property area calculator: convert land area between square feet, square meters, acres, hectares, and square yards instantly. Free, private, no signup.
Open calculatorCalculatorProperty Management Fee Calculator
Property management fee calculator: total monthly and yearly fees from percentage of rent, tenant placement and lease renewal charges. Free, runs in your browser.
Open calculatorCalculatorProperty Tax Calculator
Property tax calculator: estimate annual tax from assessed value, rate, and homestead exemptions to budget your yearly housing cost. Free, private, no signup.
Open calculatorCalculatorProrated Rent Calculator
Prorated rent calculator: split monthly rent fairly for partial months by move-in or move-out date, by day or month. Free, private, runs in your browser.
Open calculatorCalculatorRenovation Calculator
Renovation calculator: compare remodeling cost against added home value to estimate project ROI and payback period. Editable rates, free, runs locally.
Open calculatorCalculatorRental Cash Flow Calculator
Rental cash flow calculator computes monthly and annual cash flow from rent, mortgage, vacancy, taxes, and operating expenses. Editable rates, free, no signup.
Open calculatorCalculatorVacancy Rate Calculator
Vacancy rate calculator: compute rental vacancy percentage from vacant units or vacant days and see the lost revenue impact. Free, private, no signup.
Open calculatorSchool & Education 43
AP Biology
Estimate your AP Biology score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Calculus AB
Estimate your AP Calculus AB score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Calculus BC
Estimate your AP Calculus BC score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Chemistry
Estimate your AP Chemistry score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Computer Science A
Estimate your AP Computer Science A score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP English Language and Composition
Estimate your AP English Language score from multiple-choice and essay points against recent score cutoffs.
Open calculatorCalculatorAP English Literature and Composition
Estimate your AP English Literature score from multiple-choice and essay points against recent score cutoffs.
Open calculatorCalculatorAP Environmental Science
Estimate your AP Environmental Science score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Physics 1: Algebra-Based
Estimate your AP Physics 1 score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Physics 2: Algebra-Based
Estimate your AP Physics 2 score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Physics C: Electricity & Magnetism
Estimate your AP Physics C: Electricity and Magnetism score against recent score cutoffs.
Open calculatorCalculatorAP Physics C: Mechanics
Estimate your AP Physics C: Mechanics score from multiple-choice and free-response points against recent cutoffs.
Open calculatorCalculatorAP Psychology
Estimate your AP Psychology score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP Score Calculator
Estimate your AP exam score from section performance with the official composite ranges.
Open calculatorCalculatorAP Statistics
Estimate your AP Statistics score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP US Government and Politics
Estimate your AP U.S. Government and Politics score from multiple-choice and free-response points against recent cutoffs.
Open calculatorCalculatorAP US History
Estimate your AP U.S. History score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorAP World History: Modern
Estimate your AP World History score from multiple-choice and free-response points against recent score cutoffs.
Open calculatorCalculatorArithmetic Sequence Calculator
Arithmetic sequence calculator: find the nth term, sum, and common difference for any arithmetic sequence. Free, private, runs in your browser, no signup.
Open calculatorCalculatorAttendance Calculator
Attendance calculator: compute attendance percentage from classes held and attended, plus classes needed to reach a target. Free, private, no signup needed.
Open calculatorCalculatorBinary Calculator
Binary calculator: add, subtract, multiply, and divide binary numbers and convert to decimal or hex instantly. Free, private, runs locally, no signup.
Open calculatorCalculatorDecimal to Fraction Calculator
Decimal to fraction calculator: convert any decimal into a simplified fraction or mixed number, with the repeating-decimal steps shown. Free, no signup.
Open calculatorCalculatorDegree Progress Calculator
Degree progress calculator: track credits completed against requirements and GPA to estimate semesters left to graduation. Editable rates, free, private.
Open calculatorCalculatorExtra Credit Grade Calculator
See how extra credit affects your grade: add points to your current score and total, and find the new percentage and letter grade.
Open calculatorCalculatorFinal Exam Calculator
Final exam calculator: find the exact score you need on your final from your current grade, target grade, and the exam's weight. Free, private, no signup.
Open calculatorCalculatorFraction to Decimal Calculator
Fraction to decimal calculator converts any fraction to its decimal value, with repeating decimals and steps shown. Free and runs in your browser, no signup.
Open calculatorCalculatorGPA Calculator
GPA calculator: compute your semester or cumulative GPA from letter grades and credit hours, and see what grades will raise it. Free, runs in your browser.
Open calculatorCalculatorGeometric Sequence Calculator
Geometric sequence calculator: find the nth term and the sum of the series from the first term and the common ratio. Free, no signup, runs locally, formula shown.
Open calculatorCalculatorIB Grade Calculator
Convert IB subject grades and points to a total IB Diploma score on the 45-point scale, and understand the passing threshold.
Open calculatorCalculatorLaw School Admissions Calculator
Estimate your law school admissions index: combine LSAT score and undergraduate GPA into the weighted index admissions committees use, with example medians.
Open calculatorCalculatorLong Division Calculator
Long division calculator: divide two numbers and see every step shown, with quotient, remainder, and the full worked solution. Free, no signup, in browser.
Open calculatorCalculatorMidpoint Calculator
Midpoint calculator: find the midpoint of a line segment in 2D or 3D coordinates, with the distance between endpoints. Free, private, runs in your browser.
Open calculatorCalculatorPrime Factorization Calculator
Prime factorization calculator: break any integer into prime factors with exponents and list all divisors instantly. Free, private, runs locally, no signup.
Open calculatorCalculatorReading Speed Calculator
Reading speed calculator: your words per minute from a timed sample and how long any book will take to finish. Free, private, runs in your browser, no signup.
Open calculatorCalculatorReading Time Calculator
Reading time calculator: estimate how long any text takes to read from word count and your chosen words-per-minute pace. Free, private, runs in your browser.
Open calculatorCalculatorRoot Calculator
Root calculator: find square, cube, and any nth root of any number, with decimal precision you control. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSchool Supply Budget Calculator 2026: Estimate Costs by Grade
School supply budget calculator: estimate back to school costs by grade from supply lists and prices, and plan your 2026 shopping budget. Free, no signup.
Open calculatorCalculatorSemester GPA Calculator
Semester GPA calculator: enter course grades and credit hours to get your term GPA on a 4.0 scale, with editable grade points per letter. Free, no signup.
Open calculatorCalculatorSpeaking Time Calculator
Speaking time calculator converts your script's word count into estimated speech minutes at your natural pace. Free, runs locally in your browser, no signup.
Open calculatorCalculatorStudy Time Calculator
Study time calculator: plan total study hours by splitting topics, sessions, and breaks so you hit an exam deadline without cramming. Free, no signup.
Open calculatorCalculatorTest Grade Calculator
Test grade calculator: turn your score and total points into a percentage and letter grade instantly, plus what you need on remaining work. Free, no signup.
Open calculatorCalculatorTriangle Area Calculator
Triangle area calculator computes area from base and height, three sides, or coordinates, with Heron's formula steps shown. Free, runs in your browser, no signup.
Open calculatorCalculatorWeighted Grade Calculator
Weighted grade calculator: combine assignment scores and category weights into your final course grade, including what you need on the final. Free, runs locally.
Open calculatorSeller & Business 44
Amazon FBA Revenue Calculator
Amazon FBA calculator: compute product revenue, seller fees, and profit margin from any sale price and landed cost. Free, private, no signup, runs locally.
Open calculatorNewCalculatorAmazon Seller Fees Calculator
Free Amazon seller fee calculator: estimate referral, fulfillment, storage, and FBA fees plus net profit and margin , with editable 2026 assumptions.
Open calculatorCalculatorBreak-Even Units Calculator
Break-even units calculator: find how many units you must sell to cover fixed costs, plus required revenue and margin of safety. Free, runs locally, no signup.
Open calculatorCalculatorCAC to LTV Calculator
Compare customer acquisition cost (CAC) to customer lifetime value (LTV) — the LTV:CAC ratio that tells you whether growth is sustainable.
Open calculatorCalculatorCBM Calculator (Cubic Meters)
Calculate cubic meters (CBM) from package dimensions and see how many cartons fit in a 20ft, 40ft, or 40ft High Cube container.
Open calculatorCalculatorCPC ROI Simulator
Simulate pay-per-click ROI: ad spend, cost per click, conversion rate, and average order value to see true profit per click and campaign ROI.
Open calculatorCalculatorCPM Calculator
CPM calculator: convert ad spend, impressions, and revenue into cost per mille and publisher RPM to price any campaign. Free, private, runs in your browser.
Open calculatorCalculatorCash-Flow Runway Calculator
Cash flow runway calculator: turn burn rate and cash balance into months of runway so you know when your startup needs funding. Free, runs in your browser.
Open calculatorCalculatorCommission Calculator
Commission calculator: break down sales commissions by flat rate, tiered thresholds, or progressive brackets. Free, private, runs in your browser, no signup.
Open calculatorCalculatorCustomer Lifetime Value Calculator
Customer lifetime value calculator: compute CLV from gross contribution, churn, and CAC, with your LTV to CAC ratio. Free, runs in your browser, no signup.
Open calculatorCalculatorCustoms Duty Calculator
Estimate import duty and import taxes: declared value × duty rate (user-entered from the HS code), plus freight-insurance treatment and de minimis context.
Open calculatorCalculatorDHL Shipping Cost Calculator
Estimate DHL Express international cost: billable weight (DIM ÷139), zone, fuel surcharge, and customs paperwork reminders. Editable example rates.
Open calculatorCalculatorDepop Fee Calculator
Depop fee calculator: see the 10% selling fee, payment processing, and boosted listing costs, then your net payout per sale. Free, in your browser, no signup.
Open calculatorCalculatorDiscounted Cash Flow (DCF) Calculator
Value a business or project with discounted cash flow: project future free cash flows, apply a discount rate, and find the present value.
Open calculatorCalculatorEtsy Fee & Profit Calculator
Free Etsy fee calculator: estimate listing, transaction, and payment processing fees plus profit. Enter price and costs, see net earnings and margins. Privat.
Open calculatorCalculatorEvent ROI Calculator
Estimate event return on investment: revenue (tickets, sponsors, on-site sales) minus costs, shown as a ratio and percentage. Free, private, runs in your browser.
Open calculatorCalculatorFedEx Shipping Cost Calculator
FedEx rate calculator: estimate Ground and Express cost from billable weight, DIM /139, zone multiplier and fuel surcharge. Editable 2026 rates. Free.
Open calculatorCalculatorFreelance Hourly Rate Calculator
Freelance hourly rate calculator: set a rate covering expenses, taxes, billable hours, and target income so freelance work actually pays. Free, no signup.
Open calculatorCalculatorFreight Cost Estimator
Estimate ground freight: distance × rate per mile × class multiplier, plus fuel surcharge and accessorials. The standard LTL planning model with editable rates.
Open calculatorCalculatorFuel Surcharge Calculator
Compute fuel surcharge from the DOE diesel index: base rate × surcharge %, with the weekly-index math carriers use, editable for your contract.
Open calculatorCalculatorGumroad Fee Calculator
Gumroad fee calculator shows exactly what you take home from each sale after Gumroad fees, VAT, and payouts. Editable rates, free, runs in your browser.
Open calculatorCalculatorInventory Reorder Point Calculator
Reorder point calculator: combine lead time demand and safety stock to find exactly when to reorder inventory. Editable inputs, free, runs in your browser.
Open calculatorCalculatorInventory Turnover Calculator
Calculate inventory turnover ratio and days of inventory on hand — how many times you sell through your stock in a year and how efficiently you hold it.
Open calculatorGeneratorInvoice Generator
Invoice generator: create professional invoices with line items, tax, and instant PDF download in minutes. Free, editable, in your browser, no signup.
Open generatorCalculatorInvoice Late Fee Calculator
Invoice late fee calculator: charge monthly interest or flat penalties on overdue invoices from the due date to today. Free, editable rates, no signup.
Open calculatorCalculatorMarketplace Advertising Break-Even Calculator
Marketplace ad break even calculator: find break even ROAS and ACOS from product price, platform fees, and shipping costs. Free, editable rates, no signup.
Open calculatorCalculatorMercari Fee Calculator
Mercari fee calculator: see the selling fee, payment processing fee, and your net payout for any list price. Free, private, editable rates, no signup.
Open calculatorCalculatorPayPal & Stripe Fee Calculator
PayPal and Stripe fee calculator: reverse processing fees to find the exact amount to charge for your target payout. Editable rates, free, runs in your browser.
Open calculatorCalculatorPercent Off Calculator
Percent off calculator: stack multiple discounts, apply a coupon, then add sales tax to see the true final price. Free, private, runs in your browser.
Open calculatorCalculatorPoshmark Fee Calculator
Poshmark fee calculator: see the exact seller fee, shipping, and your net profit for any sale price. Free, editable rates, no signup, runs in your browser.
Open calculatorCalculatorPrice Increase Impact Calculator
Price increase calculator: model how a price rise affects demand, volume, and contribution profit so you can see the real impact before you raise. Free, private.
Open calculatorCalculatorProfit Margin and Markup Calculator
Profit margin calculator and markup calculator: get margin, markup, and gross profit from cost and price, or price from target margin. Free, no signup.
Open calculatorCalculatorSEO Traffic Value Calculator
Estimate the monetary value of your organic search traffic — monthly visitors × conversion rate × average order value, and what paid ads would cost to replace it.
Open calculatorCalculatorSales Tax and VAT Calculator
Sales tax and VAT calculator: add tax to a net price or run a reverse calculation to remove VAT from a total. Editable rates, private, in your browser.
Open calculatorCalculatorShopify Fee Calculator
Shopify fee calculator: total transaction and payment processing costs by plan, including Shopify Payments and third-party rates. Free, editable rates.
Open calculatorNewCalculatorShopify Profit Calculator
Free Shopify profit calculator: estimate payment processing, product, shipping, and ad costs plus net order profit and margin , with editable 2026 assumptions.
Open calculatorCalculatorSquare Fee Calculator
Square fee calculator: the 2.6% plus 10 cents card-present processing fee and your net payout for any sale amount. Editable rates, free, in your browser.
Open calculatorCalculatorSubscription Churn Impact Calculator
Churn calculator: measure how subscription churn cuts monthly recurring revenue and lifetime value, and what retention gains are worth. Free, no signup.
Open calculatorCalculatorUPS Shipping Cost Calculator
Estimate UPS package cost: billable weight with dimensional weight (÷139), zone multiplier, fuel surcharge, and extras. Editable example rates.
Open calculatorCalculatorUSPS Shipping Cost Calculator
Estimate USPS postage for letters and packages: billable weight with dimensional weight, zone multiplier, and fuel surcharge. Example 2026 retail rates, editable.
Open calculatorCalculatoreBay Fee Calculator
eBay fee calculator: see exactly what eBay takes on a sale: final value fees, insertion fee, shipping, cost, then your real profit per listing.
Open calculatorNewCalculatoreBay Fee and Profit Calculator
eBay fee calculator: final value fees by category, the $0.30/$0.40 per-order fee, tiered rates above $7,500, insertion and international fees, plus net profit, margin, and break-even. 2026 rates, fully editable.
Open calculatorCalculatoreBay Profit Margin Calculator
See true per-unit profit on eBay: item cost + final value fee (13.25% on sale price) + payment processing + shipping, all in one view. Buyer-paid vs free shipping side by side.
Open calculatorCalculatoreBay Shipping Cost Calculator
Model eBay shipping economics: buyer-paid vs free shipping, billable weight, and the effect on your net profit per sale. Pairs with the eBay fee calculator.
Open calculatorSocial Media 11
Engagement Rate Calculator
Engagement rate calculator: measure likes, comments, and shares as a percentage of followers to benchmark your social media posts. Free, private, no signup.
Open calculatorCalculatorFacebook Ads Cost Calculator
Facebook ads cost calculator: project CPM, CPC, CTR, spend, and ROAS for any campaign budget and audience. Free, editable rates, runs locally, no signup.
Open calculatorCalculatorFollower Growth Calculator
Follower growth calculator: project social media audience size from follower counts and growth rates over time. Free, private, no signup, runs in your browser.
Open calculatorCalculatorHashtag Performance Calculator
Hashtag performance calculator: measure reach, impressions, and engagement rate per hashtag to see which tags actually grow your posts. Free, no signup.
Open calculatorCalculatorInstagram Influencer Pricing Calculator
Instagram influencer pricing calculator: price sponsored posts, stories, and reels from followers and engagement rate. Free, editable rates, no signup.
Open calculatorCalculatorLove Compatibility Calculator
Love compatibility calculator: score a match from two names and zodiac signs for fun relationship compatibility. Free, private, entertainment only, no signup.
Open calculatorCalculatorPost Frequency Calculator
Post frequency calculator: plan your posting schedule and cadence for each platform to hit weekly content targets without creator burnout. Free, no signup.
Open calculatorCalculatorSocial Media Earnings Calculator
Social media earnings calculator: estimate potential income per post and sponsorship value from your followers and engagement. Free, private, no signup.
Open calculatorCalculatorTikTok Money Calculator
TikTok money calculator: estimate earnings from monthly views and creator fund rate, with the formula and a worked example shown. Free, private, no signup.
Open calculatorCalculatorVideo Watch Time Calculator
Video watch time calculator: convert views and average view duration into total watch hours and retention. Free, runs locally in your browser, no signup.
Open calculatorCalculatorYouTube Monetization & Revenue Calculator
YouTube money calculator: see what 100,000 views actually pays at your RPM, with a real worked example and Partner Program rules. Free, no signup, private.
Open calculatorSports 23
Baseball OPS Calculator
Baseball OPS calculator: combine on-base percentage and slugging percentage from hits, walks, and total bases. Free, private, no signup, runs in browser.
Open calculatorCalculatorBatting Average Calculator
Batting average calculator: hits divided by at-bats. Free batting average calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorBowling Handicap Calculator
Bowling handicap calculator: league handicap from average. Free bowling handicap calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorCycling Power to Weight Calculator
Cycling power to weight calculator: convert your FTP and body weight into w/kg and compare against rider categories. Free, private, no signup, in browser.
Open calculatorCalculatorEffective Field Goal Percentage Calculator
Effective field goal percentage calculator: adjust field goal percentage for three-point value to measure true shooting efficiency. Free, runs locally, no signup.
Open calculatorCalculatorField Goal Probability Calculator
Field goal probability calculator: estimate NFL kick success odds from distance and stadium conditions. Editable model inputs, free, runs locally offline.
Open calculatorCalculatorGolf Club Distance Calculator
Golf club distance calculator: estimate how far you hit each club from swing speed, age, and skill level. Editable distances, free, runs in your browser.
Open calculatorCalculatorGolf Handicap Calculator
Golf handicap calculator: turn recent scorecards into your official-style handicap index using score differentials. Free, private, runs locally, no signup.
Open calculatorCalculatorGrip Strength Calculator
Grip strength calculator: handgrip rating by age and gender. Free grip strength calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorHiking Time Calculator
Hiking time calculator: Naismith's rule estimate from trail distance, elevation gain, and your pace. Free, editable pace, runs in your browser, no signup.
Open calculatorCalculatorMarathon Pace Predictor
Marathon pace predictor: convert a recent race time into a realistic marathon finish time and per-mile splits. Free, private, runs locally, no signup.
Open calculatorCalculatorNFL Passer Rating Calculator
NFL passer rating calculator: enter completions, attempts, yards, touchdowns, and interceptions for the official rating. Free, no signup, runs in your browser.
Open calculatorCalculatorPlank Test Calculator
Plank test calculator: core endurance rating from hold time. Free plank test calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPush Up Test Calculator
Push up test calculator: fitness rating by age and reps. Free push up test calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorQuarterback Rating Calculator
Quarterback rating calculator: compute NFL passer rating from completions, passing yards, touchdowns and interceptions. Free, runs locally, no signup.
Open calculatorCalculatorShooting Percentage Calculator
Shooting percentage calculator: convert makes and attempts into field goal, three point and free throw percentages instantly. Free, editable, no signup.
Open calculatorCalculatorSit Up Test Calculator
Sit up test calculator: enter your age, gender and rep count to see your muscular endurance fitness rating. Free, private, runs in your browser, no signup.
Open calculatorCalculatorSki Length Calculator
Ski length calculator: get your ideal ski length from height, weight, ability level, and terrain preference in seconds. Free, private, in your browser.
Open calculatorCalculatorSoccer Speed Calculator
Soccer speed calculator: sprint speed from distance and time. Free soccer speed calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorSwim Pace Calculator
Swim pace calculator: your minutes per 100 meters or 100 yards from pool or open water distance and total time. Free, private, formula shown, no signup.
Open calculatorCalculatorTrue Shooting Percentage Calculator
True shooting percentage calculator: measure basketball scoring efficiency from points, field goal attempts, and free throw attempts. Free, private, no signup.
Open calculatorCalculatorVertical Jump Calculator
Vertical jump calculator: convert standing reach and jump reach into your vertical leap height in inches or cm plus power estimates. Free, runs locally.
Open calculatorCalculatorWin Loss Percentage Calculator
Win loss percentage calculator: enter wins, losses, and ties to get your winning percentage, with ties counted as half a win. Free, private, no signup.
Open calculatorStatistics 28
Average Return Calculator
Average return calculator: simple average of yearly returns. Free average return calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorBayes Theorem Calculator
Bayes theorem calculator: update a prior probability into a posterior using test sensitivity, specificity, and base rate for risk decisions. Free, no signup.
Open calculatorCalculatorBinomial Probability Calculator
Binomial probability calculator: compute exact, at least, and at most outcomes for n trials with success probability p. Free, runs in your browser offline.
Open calculatorCalculatorChi-Square Goodness of Fit Calculator
Chi square goodness of fit calculator: test if observed counts match expected distributions and get the statistic and p-value. Free, runs locally, no signup.
Open calculatorCalculatorCohen's D Calculator
Cohen's d calculator measures effect size between two groups from means and standard deviations, with interpretation. Free, private, runs in your browser.
Open calculatorCalculatorCombinations and Permutations Calculator
Combinations and permutations calculator: compute nCr and nPr with or without repetition, with formula steps shown. Free, no signup, runs locally in browser.
Open calculatorCalculatorConditional Probability Calculator
Conditional probability calculator computes P(A|B) from event probabilities with clear Bayes working shown. Free, private, runs locally in your browser.
Open calculatorCalculatorCorrelation Coefficient Calculator
Correlation coefficient calculator: compute Pearson r from paired x and y data to see how strongly two variables move together. Free, private, no signup.
Open calculatorCalculatorExpected Value Calculator
Expected value calculator: multiply each outcome by its probability and sum them for the EV of any bet or decision. Free, no signup, runs in your browser.
Open calculatorCalculatorFive Number Summary Calculator
Five number summary calculator: minimum, lower and upper quartiles, median, maximum, plus IQR and outlier flags from your data set. Free, in your browser.
Open calculatorCalculatorGeometric Distribution Calculator
Geometric distribution calculator: compute probability of first success on trial n, mean, and variance. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorGeometric and Harmonic Mean Calculator
Geometric mean calculator: compute geometric and harmonic means for growth rates, investment returns, and ratios. Free, private, runs locally, no signup.
Open calculatorCalculatorHarmonic Mean Calculator
Harmonic mean calculator: n divided by the sum of reciprocals. Free harmonic mean calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorIQR Calculator
iqr calculator that finds the interquartile range, Q1, Q3, and outliers for any data set and shows the five-number summary. Free, private, runs in your browser.
Open calculatorCalculatorIndependent Events Calculator
Independent events calculator: compute the combined probability of multiple independent events happening together, step by step. Free, no signup, runs in browser.
Open calculatorCalculatorLinear Regression Calculator
Linear regression calculator: fit a least squares line to x and y data and get slope, intercept, r, and r2 values. Free, private, no signup, runs locally.
Open calculatorCalculatorMargin of Error Calculator
Margin of error calculator: compute survey margin of error from sample size, confidence level, and population size. Free, private, no signup, in your browser.
Open calculatorCalculatorMoving Average Calculator
Moving average calculator: simple moving average of a series. Free moving average calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorNormal Distribution Probability Calculator
Normal distribution probability calculator: find area under the bell curve between z scores or raw values. Free, editable mean and SD, runs locally offline.
Open calculatorCalculatorOdds Ratio Calculator
Odds ratio calculator: compute odds ratio, 95% confidence interval, and p-value from a 2x2 table. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorOutlier Calculator
Outlier calculator: find outliers in a data set using the IQR rule and z-scores, showing which values fall outside normal bounds and why. Free, runs locally.
Open calculatorCalculatorP Value Calculator
P value calculator: get exact p values from z, t, chi-square, or F test statistics for hypothesis testing. Free, private, runs in your browser, no signup.
Open calculatorCalculatorPercentage Error Calculator
Percentage error calculator: compare a measured value to the true value and get percent error instantly. Free, private, runs locally in your browser, no signup.
Open calculatorCalculatorPermutation Combination Calculator
Permutation and combination calculator: nPr and nCr. Free permutation combination calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorPoisson Probability Calculator
Poisson probability calculator: compute exact event probabilities from a mean rate, including P(X=k) and cumulative ranges. Free, runs locally, no signup.
Open calculatorCalculatorSkewness Calculator
Skewness calculator: compute sample skewness and kurtosis for any data set with a plain-language interpretation. Free, private, runs locally, no signup.
Open calculatorCalculatorT Test Calculator
t test calculator that runs one-sample, two-sample, and paired t-tests and returns t-statistics, p-values, and significance. Free, private, runs in your browser.
Open calculatorCalculatorZ Test Calculator
Z test calculator: z-score for a sample mean vs a known population. Free z test calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorText & Developer Tools 23
AI Citation Readiness Checker
Audit your robots.txt, llms.txt, and page HTML for AI-crawler access and citation-readiness. Three evidence-based layers, instant results, nothing uploaded.
Open toolText toolAI Visibility Checker
AI visibility checker: run a guided audit across ChatGPT, Perplexity, Gemini and Copilot with ready-made prompts, score your mentions, and get honest fixes. Free, private, runs in your browser.
Open toolText toolBrand Context Audit
Score how clearly AI assistants can read, categorize, and recommend your business from your own copy. Six deterministic checks, instant results, private.
Open toolText toolColor Picker
Color picker: pick any color and convert between HEX, RGB, and HSL values with copy-ready codes for design and web work. Free, private, no signup needed.
Open toolText toolCountry Facts and Comparison
Country facts: look up and compare population, area, flags, currency, and other key data for countries of the world by region. Free, runs in your browser.
Open toolText toolEmail Preview Tester
Email preview tester: check how your subject line and preheader render in Gmail, mobile inboxes, and truncated views before you send. Free, no signup.
Open toolText toolFleet Cost per Mile Calculator
Your true trucking cost per mile from monthly fixed and variable costs, with deadhead adjustment and a 1.5x target-rate benchmark.
Open toolText toolFolder to Prompt
Folder to prompt: turn a codebase folder into one organized prompt with full file tree and source code for LLM context. Free, runs locally, no upload.
Open toolText toolFreight Mode Comparison Calculator
Compare LTL, full truckload, and intermodal for one shipment: cost, transit time, and when each mode wins. Enter weight, distance, and class to see all three.
Open toolText toolHotshot Rate Calculator
Minimum viable hotshot rate: your cost per mile, deadhead miles, and target margin rolled into a defensible quote. Know the floor rate before you negotiate a load.
Open toolText toolJSON Formatter
JSON formatter and validator: pretty print, beautify and validate JSON online with instant error locations. Free, private, runs in your browser, no signup.
Open toolText toolKeyword Density Calculator
Keyword density calculator: measure keyword frequency and density percentages in any text to keep your SEO copy natural. Free, private, in-browser, no signup.
Open toolText toolLoad Profitability Calculator
Will this load make money? Net revenue and margin from rate, miles, deadhead, your cost per mile, and fuel surcharge. Check any trucking load before you accept it.
Open toolText toolMeta Tag Generator
Meta tag generator: build SEO title, description, robots, and Open Graph tags with a live preview of search and social share results. Free, no signup.
Open toolText toolMorse Code Converter
Morse code converter: translate text into international Morse code, or decode dots and dashes back into text instantly. Free, private, in-browser, no signup.
Open toolText toolPassword Generator
Password generator: create strong, random passwords with custom length, symbols, numbers, and character rules. Free, runs locally in your browser, no signup.
Open toolText toolReadability Calculator
Readability calculator: score any text with Flesch Kincaid grade level and reading ease to check comprehension. Free, runs in your browser, no signup.
Open toolText toolReefer Shipping Cost Calculator
Estimate temperature-controlled truckload cost: dry van base plus the reefer premium by temperature band and multi-zone needs.
Open toolText toolSlug Generator
URL slug generator: slugify any text into SEO friendly, url friendly slugs for your blog posts and landing pages. Free, private, runs in browser, no signup.
Open toolText toolSubnet Calculator
Subnet calculator: convert an IPv4 address and CIDR mask into network, broadcast, wildcard, and usable host ranges instantly. Free, runs in your browser.
Open toolText toolTyping Test
Typing test: measure your typing speed in WPM and accuracy in one minute, with instant results and an error breakdown. Free, private, no signup required.
Open toolText toolUUID Generator
UUID generator: create random UUID v4 identifiers instantly, one at a time or in bulk, ready to copy anywhere. Free, runs locally in your browser, no signup.
Open toolText toolWord Counter
Word counter: count words, characters, sentences and paragraphs in any text as you type or paste it in. Free, private, runs in your browser, no signup.
Open toolTime & Work 41
Bandwidth Calculator
Bandwidth calculator: convert file size and transfer time into required speed, or estimate download and upload times. Free, no signup, runs in your browser.
Open calculatorCalculatorBilling Rate Calculator
Billing rate calculator: turn target salary, billable hours, and overhead into an hourly consulting rate. Free, editable inputs, runs locally, no signup.
Open calculatorCalculatorBonus Percentage Calculator
Bonus percentage calculator works out bonus amounts from salary or base pay at any percent, or the rate from an amount. Free, editable rates, no signup.
Open calculatorCalculatorBusiness Days Calculator
Business days calculator: count working days between two dates or add business days, skipping weekends and holidays. Free, private, runs in your browser.
Open calculatorTimerCountdown Timer
Countdown timer: set a free online countdown clock for cooking, workouts, meetings, and study, with an alarm when time runs out. No signup, runs locally.
Open timerCalculatorDate Calculator Workspace
Date calculator: add or subtract days from any date, find the difference between two dates, and get the weekday result. Free, private, runs in your browser.
Open calculatorCalculatorDate Difference Calculator
Date difference calculator: find the exact days, weeks, months, and years between two dates for deadlines, ages, and project timelines. Free, no signup.
Open calculatorCalculatorEmployee Turnover Calculator
Employee turnover calculator: annual and monthly turnover rate from departures and average headcount, with cost context. Free, formula shown, runs locally.
Open calculatorCalculatorExpense Split Calculator
Expense split calculator: split shared bills among roommates or trips fairly, with unequal shares and who-owes-who results. Free, no signup, in your browser.
Open calculatorCalculatorHoliday Pay Calculator
Holiday pay calculator: compute holiday pay from hourly wage or salary, overtime rules, and premium rates. Free, editable rates, runs locally, no signup.
Open calculatorCalculatorHours and Minutes Calculator
Hours and minutes calculator: add and subtract time in hours and minutes for timesheets, payroll, and client billing. Free, private, runs in your browser.
Open calculatorCalculatorInvoice Fee Calculator
Invoice fee calculator: see exactly what PayPal, Stripe, or card processing costs on any invoice amount. Free, editable rates, runs locally, no signup.
Open calculatorCalculatorLate Fee Calculator
Late fee calculator: compute rent or invoice late fees from flat amounts, percentage, or daily interest with editable rates. Free, runs in your browser.
Open calculatorCalculatorMeeting Cost Calculator
Meeting cost calculator: total the labor cost of any meeting from attendee salaries, duration, and headcount to see what time really costs. Free, runs in browser.
Open calculatorCalculatorMileage Log Calculator
Mileage log calculator: total trip miles and reimbursement value using an editable IRS-style rate per mile for taxes. Free, private, runs in your browser.
Open calculatorCalculatorMileage Reimbursement Calculator
Mileage reimbursement calculator: multiply business miles by the IRS rate or your own custom rate for exact reimbursement totals. Free, no signup, editable rates.
Open calculatorCalculatorMonitor Height Calculator
Monitor height calculator finds the ideal screen height and eye-level position from your desk and eye measurements. Free, private, runs in your browser.
Open calculatorCalculatorOn Call Pay Calculator
On call pay calculator computes total standby compensation from your hourly rate, on-call hours and call-out premiums. Free, editable rates, no signup.
Open calculatorCalculatorOvertime Calculator
Overtime calculator: compute time-and-a-half and double-time overtime pay from your hourly rate and hours worked each week. Free, editable rates, no signup.
Open calculatorCalculatorPTO Accrual Calculator
PTO accrual calculator: compute vacation hours earned per pay period, per hour worked, and your running balance over time. Editable rates, free, private.
Open calculatorTimerPomodoro Timer
Pomodoro timer: run 25/5 focus sessions with fully adjustable work and break lengths to beat procrastination. Free, private, runs in browser, no signup.
Open timerCalculatorPrintable Calendar
Printable calendar: generate a blank monthly calendar as a free PDF you can print, for any month and year you need. No signup, runs in your browser tab.
Open calculatorCalculatorProject Quote Calculator
Project quote calculator turns your hourly rate, hours and material costs into a professional client quote with margin. Free, runs locally, no signup.
Open calculatorCalculatorRaise Percentage Calculator
Raise percentage calculator: convert a pay raise amount or new salary into the exact percentage increase before you accept the offer. Free, runs locally.
Open calculatorCalculatorRetainer Calculator
Retainer calculator converts your monthly hours and rate into a retainer price, showing effective hourly value. Free, editable rates, runs in your browser.
Open calculatorCalculatorRoyalty Calculator
Royalty calculator computes earnings from sales revenue or units sold at your royalty rate, with editable rates. Free, runs in your browser, no signup.
Open calculatorCalculatorSalary to Hourly Converter
Salary to hourly calculator: convert an annual salary into an hourly rate from hours per week and weeks per year to compare offers. Free, runs locally.
Open calculatorCalculatorSales Commission Calculator
Sales commission calculator: compute commission from sale amount, rate, and salary plus commission for any pay period. Editable rates, free, runs locally.
Open calculatorCalculatorSeverance Pay Calculator
Severance pay calculator: estimate severance from salary, years of service, and your weeks-per-year policy. Free, editable terms, runs locally, no signup.
Open calculatorCalculatorShift Differential Calculator
Shift differential calculator: compute extra pay for night, weekend, or holiday shifts by percentage or flat rate per hour. Free, no signup, runs locally.
Open calculatorCalculatorSprint Capacity Calculator
sprint capacity calculator that converts team size, time off, and ceremonies into available story points or hours for your sprint. Free, runs locally, no signup.
Open calculatorCalculatorStanding Desk Calculator
Standing desk calculator: find your ideal standing desk and monitor height from your height for ergonomic posture. Free, private, runs in your browser.
Open calculatorTimerStopwatch
Stopwatch: precision online stopwatch with lap times, split recording, and hundredth-of-a-second accuracy for timing anything. Free, private, no signup.
Open timerCalculatorStory Points to Hours Calculator
Story points to hours calculator: convert agile story points into hour estimates using your team velocity. Free, editable rates, runs locally, no signup.
Open calculatorPopularCalculatorTime Card Calculator
Time card calculator with lunch: total daily and weekly work hours, subtract breaks, and compute overtime for payroll from clock in and out times. Free.
Open calculatorCalculatorTime Zone Meeting Planner
Time zone meeting planner: compare times across cities and find the best slot for every attendee. Free online calculator, runs in your browser, no signup.
Open calculatorCalculatorTime to Decimal Calculator
Time to decimal calculator: convert hours and minutes into decimal hours for payroll, timesheets, and client billing. Free, private, runs in your browser.
Open calculatorCalculatorTravel Reimbursement Calculator
Travel reimbursement calculator: combine mileage, per diem, and out-of-pocket expenses into one exact claim amount. Editable rates, free, runs locally, no signup.
Open calculatorCalculatorVacation Accrual Calculator
Vacation accrual calculator: track PTO hours or days earned per pay period and see your current balance from total hours worked. Free, runs in your browser.
Open calculatorCalculatorWords Per Minute Calculator
Words per minute calculator: measure typing speed and accuracy from your word count and error count, with WPM benchmarks. Free, no signup, runs locally.
Open calculatorCalculatorWorld Clock
World clock: check the current time in countries and major cities worldwide, with live time zones and local day or night status shown. Free, no signup.
Open calculatorTimers 29
1 Minute Timer
1 minute timer: set a free one minute online countdown with a clear alarm sound. Runs locally in your web browser, no signup, phone and desktop ready.
Open timerTimer10 Minute Timer
10 minute timer that counts down with an alarm and keeps counting up until dismissed, great for study sprints. Free, runs locally in your browser, no signup.
Open timerTimer12 Minute Timer
12 minute timer for meditation, runs, and kitchen steps, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer15 Minute Timer
15 minute timer for focused work, cooking, or workouts, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer18 Minute Timer
18 minute timer for TED length talks, sprints, and timed tasks, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup.
Open timerTimer2 Minute Timer
2 minute timer: set a free two minute online countdown with a clear alarm sound. Runs locally in your web browser, no signup, phone and desktop ready.
Open timerTimer20 Minute Timer
20 minute timer with a clear countdown display and alarm at zero, ideal for pomodoro sessions and quizzes. Free, runs locally in your browser, no signup required.
Open timerTimer25 Minute Timer
25 minute timer built for classic pomodoro focus blocks, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer3 Minute Timer
3 minute timer: set a free three minute online countdown with a clear alarm sound. Runs locally in your web browser, no signup, phone and desktop ready.
Open timerTimer30 Minute Timer
30 minute timer for study blocks, meetings, and workouts, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer4 Minute Timer
4 minute timer for eggs, tea steeps, and quick drills, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer40 Minute Timer
40 minute timer for exam practice, lessons, and long intervals, with an alarm at zero and a count-up. Free, runs locally in your browser, no signup required.
Open timerTimer45 Minute Timer
45 minute timer for deep work sessions, classes, and exercise, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer5 Minute Timer
5 minute timer: set a free five minute online countdown with a clear alarm sound. Runs locally in your web browser, no signup, phone and desktop ready.
Open timerTimer50 Minute Timer
50 minute timer: set a 50 minute countdown with a loud alarm, plus pause, resume and restart controls, running locally in your browser. Free, no signup.
Open timerTimer6 Minute Timer
6 minute timer for soft boiled eggs, tabata rounds, and quick tasks, with an alarm at zero and a count-up. Free, runs locally in your browser, no signup required.
Open timerTimer60 Minute Timer
60 minute timer for hour-long work blocks, exams, and training, with an alarm at zero and a count-up. Free, runs locally in your browser, no signup required.
Open timerTimer7 Minute Timer
7 minute timer for the seven minute workout, quick chores, and timed breaks, with an alarm at zero. Free, runs locally in your browser, no signup required.
Open timerTimer8 Minute Timer
8 minute timer for workouts, cooking steps, and power naps, with an alarm at zero and a count-up after. Free, runs locally in your browser, no signup required.
Open timerTimer90 Minute Timer
90 minute timer for ultradian work cycles, sports halves, and long study sessions, with alarm at zero. Free, runs locally in your browser, no signup required.
Open timerTimerAMRAP Timer
Free AMRAP timer (as many rounds as possible): set a countdown from 5 to 60 minutes and count your rounds. Runs offline, beep at time-up, no signup.
Open timerTimerBox Breathing Timer
Free box breathing timer with an animated square: follow the dot through 4-4-4-4 inhale-hold-exhale-hold cycles. Editable pace, presets, soft cues. Runs in your browser.
Open timerTimerBoxing Round Timer
Free boxing round timer: classic 3-minute rounds with 1-minute rest, 12 rounds. Editable for 2/3-minute rounds and amateur formats. Bell-style audio cue, runs in your browser.
Open timerTimerChess Clock
Free online chess clock: two independent countdowns with tap-to-switch. Preset time controls (bullet 1+0, blitz 3+2, 5+0, rapid 10+0) or set custom minutes. Runs offline in your browser.
Open timerTimerEMOM Timer
Free EMOM timer (every minute on the minute): 60-second rounds with a beep at each minute mark. Set rounds, work and rest within each minute. Audio cues, runs in your browser.
Open timerTimerHIIT Timer (30/10)
Free HIIT interval timer: the popular 30/10 split — 30 seconds work, 10 seconds transition, 10 rounds. Fully editable work/rest/rounds with audio cues. No signup, runs offline.
Open timerTimerMeditation Timer
Free meditation timer: set 5 to 60 minutes, one soft bell at start and end. No music, no guidance — just a clean silent countdown with a completion chime. Runs offline.
Open timerTimerProtocol Timers
Scientific protocol timers with stage-by-stage alarms for lab workflows. Runs entirely in your browser.
Open timerTimerTabata Timer
Free Tabata timer: 20 seconds all-out work, 10 seconds rest, 8 rounds — the classic 4-minute protocol. Editable rounds and intervals, audio cues, runs offline in your browser.
Open timerTravel 14
Clothing Size Converter
Clothing size converter: translate body measurements between US, UK, EU, and international sizes for men, women, and kids. Free, private, no signup needed.
Open calculatorCalculatorCommute Cost Calculator
Commute cost calculator: total yearly driving, fuel, parking and transit cost for any commute distance and days worked per week. Free, runs locally, no signup.
Open calculatorCalculatorFlight Delay Compensation Calculator
Flight delay compensation calculator: estimate EU261 or DOT payout amounts from delay length, flight distance and route type. Free, no signup, in-browser.
Open calculatorCalculatorHotel Stay Cost Calculator
Hotel stay cost calculator: total nightly rate, taxes, fees, and extras across your whole stay in seconds. Editable rates, free, runs in your browser.
Open calculatorCalculatorInternational Moving Cost Calculator
Estimate international moving cost by household size and shipping method — shared container (LCL), full container (FCL), or air freight.
Open calculatorCalculatorJet Lag Calculator
Jet lag calculator: plan eastbound or westbound travel adaptation with a day-by-day recovery schedule across time zones. Free, private, runs locally, no signup.
Open calculatorCalculatorLuggage Volume Calculator
Luggage volume calculator: compute total liters from bag dimensions in cm or inches to check airline carry-on and checked limits. Free, private, no signup.
Open calculatorCalculatorMoving Truck Size Calculator
Find the right moving truck size by number of rooms, from a studio (cargo van) to a 4-bedroom house (26-foot truck). Includes capacity estimates and cost notes.
Open calculatorCalculatorPacking Weight Calculator
Packing weight calculator: total your luggage weight item by item and check it against airline carry-on and checked bag limits. Free, editable, no signup.
Open calculatorCalculatorParking Cost Calculator
Parking cost calculator: compare hourly, daily, and monthly parking rates to find your cheapest option over any period. Free, editable rates, no signup.
Open calculatorCalculatorRental Car Cost Calculator
Rental car cost calculator: total up daily rates, fees, taxes, insurance, and fuel for your whole trip before you book. Free, editable rates, no signup.
Open calculatorCalculatorToll Cost Calculator
Toll cost calculator: estimate total toll charges for any route by toll road, vehicle class, and trip frequency. Editable rates, free, runs in your browser.
Open calculatorCalculatorTravel Budget Calculator
Travel budget calculator that estimates trip costs for flights, hotels, food, and activities with editable rates. Free, runs in your browser, no signup.
Open calculatorCalculatorWarehouse Storage Cost Calculator
Estimate monthly warehouse storage cost by pallet count and rate, or by square footage — for e-commerce and inventory storage planning.
Open calculatorVehicles 23
Auto Insurance by State
Auto insurance by state: look up car insurance minimums, no fault rules and average premiums for every US state. Free, runs in your browser, no signup.
Open calculatorCalculatorCar Insurance Estimator
Car insurance estimator: project annual premiums from your driver profile, vehicle and coverage choices. Editable rates, runs locally, free, no signup.
Open calculatorCalculatorCar Loan Refinance Calculator
Car loan refinance calculator: compare your current auto loan against a new rate and term to see monthly savings and total interest. Free, private, no signup.
Open calculatorCalculatorDiesel vs Gas Calculator
Diesel vs gas calculator: per-mile fuel cost comparison. Free diesel vs gas calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorEV Charge Time Calculator
EV charge time calculator: hours to charge an EV battery. Free ev charge time calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorEV Range Calculator
EV range calculator: estimate electric car range from battery size, efficiency, temperature, speed, and payload adjustments. Free, editable rates, no signup.
Open calculatorCalculatorEV vs Gas Savings Calculator
EV vs gas savings calculator: compare electricity cost per mile against gas, plus maintenance, and see total yearly savings. Free, editable rates, no signup.
Open calculatorCalculatorEngine Horsepower Calculator
Engine horsepower calculator: compute HP from torque and RPM, or estimate it from vehicle weight and acceleration test runs. Free, editable inputs, in-browser.
Open calculatorCalculatorFuel Cost Per Mile Calculator
Fuel cost per mile calculator: compute driving cost per mile from fuel price, vehicle efficiency, and trip distance. Editable rates, free, no signup needed.
Open calculatorCalculatorGas Budget Calculator
Gas budget calculator: monthly and yearly fuel spending. Free gas budget calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorHP to Weight Ratio Calculator
HP to weight ratio calculator: compare horsepower per ton or pound for any vehicle and see performance class instantly. Free, no signup, runs in your browser.
Open calculatorCalculatorHorsepower Calculator
Horsepower calculator: convert torque and RPM into horsepower and kW, or derive power from weight and trap speed. Free, private, runs in your browser.
Open calculatorCalculatorIdle Cost Calculator
Idle cost calculator: total the money lost to idle equipment, staff downtime, or stalled processes per hour, day, or year. Editable rates, free, no signup.
Open calculatorCalculatorLease vs Buy Calculator
Lease vs buy calculator: compare total cost of leasing against financing a car with down payment, fees, and resale. Editable rates, free, runs locally.
Open calculatorCalculatorPayload and Towing Calculator
Payload and towing calculator: check GVWR, payload and towing capacity before you hitch a trailer or load the truck bed. Editable ratings, free, no signup.
Open calculatorCalculatorQuarter Mile Time Calculator
Quarter mile time calculator: estimate quarter mile ET and trap speed from vehicle weight and horsepower. Free, no signup, runs entirely in your browser.
Open calculatorCalculatorRoad Trip Cost Calculator
Road trip cost calculator: fuel, hotels, and food for a trip. Free road trip cost calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorStopping Distance Calculator
Stopping distance calculator: compute total braking distance from speed, reaction time, road grade, and friction. Runs locally in your browser, no signup.
Open calculatorCalculatorTire Pressure Calculator
Tire pressure calculator: psi change with temperature. Free tire pressure calculator with the formula shown - runs entirely in your browser, no signup.
Open calculatorCalculatorTire Size Comparison Calculator
Tire size comparison calculator: compare two tire sizes for diameter difference, speedometer error, and fitment before you buy. Free, private, no signup.
Open calculatorCalculatorTire Tread Depth Calculator
tire tread depth calculator that converts 32nds to mm, estimates remaining tire life, and warns at the 2/32 replacement limit. Free, runs locally, no signup.
Open calculatorCalculatorTowing Capacity Calculator
Towing capacity calculator: estimate safe maximum trailer weight from vehicle GVWR, curb weight, and payload ratings before you hitch up. Free, no signup.
Open calculatorCalculatorVehicle Depreciation Calculator
Vehicle depreciation calculator: project your car's resale value year by year with editable depreciation rates. Free, private, runs locally, no signup.
Open calculator