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See modern equivalents for historical measures. Private, no account.","category":"Converters"},{"name":"Angle Converter","path":"/angle-converter/","description":"Angle converter: degrees, radians, and gradians.","category":"Converters"},{"name":"Angular Momentum Calculator","path":"/angular-momentum-calculator/","description":"Calculate angular momentum of a point mass from mass, velocity, and radius (L = mvr).","category":"Physics"},{"name":"Annuity Calculator","path":"/annuity-calculator/","description":"Estimate the future value or payout of an annuity based on deposit, rate, and term.","category":"Everyday Calculators"},{"name":"Annuity Payout Calculator","path":"/annuity-payout-calculator/","description":"Annuity payout calculator: monthly income from a lump sum at a fixed rate.","category":"Finance & Investing"},{"name":"Appliance Energy Cost Calculator","path":"/appliance-energy-cost-calculator/","description":"Appliance energy cost calculator: running cost from wattage, usage, and your electricity rate.","category":"Energy 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sample rate, bit depth, and channels.","category":"Music & Audio"},{"name":"Audio Time Stretch Calculator","path":"/audio-time-stretch-calculator/","description":"Calculate the new duration when audio playback speed changes.","category":"Music & Audio"},{"name":"Auto Insurance by State","path":"/auto-insurance-by-state-calculator/","description":"Auto insurance by state: minimum liability limits, no-fault status and coverage tips for every state.","category":"Vehicles"},{"name":"Auto Loan Calculator","path":"/auto-loan-calculator/","description":"Estimate an auto loan payment, amount financed, total interest, and year-by-year balance.","category":"Finance & Investing"},{"name":"Average Atomic Mass Calculator","path":"/average-atomic-mass-calculator/","description":"Calculate average atomic mass from isotope masses and abundances.","category":"Chemistry"},{"name":"Average Return Calculator","path":"/average-return-calculator/","description":"Average return calculator: simple average of yearly returns.","category":"Statistics"},{"name":"Average Share Cost Calculator","path":"/stock-average-cost-calculator/","description":"Calculate weighted average share cost, total shares, cost basis, and unrealized gain.","category":"Finance & Investing"},{"name":"BMI Calculator","path":"/bmi-calc/","description":"Calculate BMI quickly and privately in your browser.","category":"Health"},{"name":"BMR & TDEE Calculator","path":"/bmr-tdee-calculator/","description":"Estimate adult BMR and TDEE from the Mifflin-St Jeor equation and an explicit activity multiplier.","category":"Health"},{"name":"BPM to Delay Time Calculator","path":"/bpm-to-delay-calculator/","description":"Convert BPM (beats per minute) into delay and reverb timing in milliseconds for quarter, eighth, and dotted eighth notes.","category":"Everyday Calculators"},{"name":"BPM to MS Calculator","path":"/bpm-to-ms-calculator/","description":"Convert beats per minute to milliseconds for note divisions used in music production.","category":"Music & Audio"},{"name":"BTU Calculator","path":"/btu-calculator/","description":"Estimate the BTUs needed to heat or cool a room based on size and conditions.","category":"Everyday Calculators"},{"name":"Baby Formula Calculator","path":"/baby-formula-calculator/","description":"Baby formula calculator: ounces per feeding from baby weight.","category":"Health"},{"name":"Background Text Color Calculator","path":"/background-text-color-calculator/","description":"Background text color calculator: choose black or white text on any background color for best contrast.","category":"Colors & Design"},{"name":"Backsplash Calculator","path":"/backsplash-calculator/","description":"Backsplash calculator: material area for a kitchen backsplash after subtracting openings.","category":"Construction & Measurement"},{"name":"Baking Conversions","path":"/baking-conversions/","description":"Convert cooking and baking measurements between cups, tablespoons, teaspoons, grams, ounces, milliliters, and liters, with ingredient densities.","category":"Converters"},{"name":"Baking Ratio Calculator","path":"/baking-ratio-calculator/","description":"Baking ratio calculator: scale ingredients by baker's percentage or classic ratios (e.g., 3:2:1 pastry).","category":"Food & Cooking"},{"name":"Balance Transfer Savings Calculator","path":"/balance-transfer-savings-calculator/","description":"Compare keeping credit-card debt with transferring it to a promotional APR after fees.","category":"Finance & Investing"},{"name":"Balloon Payment Calculator","path":"/balloon-payment-calculator/","description":"Balloon payment calculator: monthly payment plus final balloon balance.","category":"Finance & Investing"},{"name":"Baluster Spacing Calculator","path":"/baluster-spacing-calculator/","description":"Baluster spacing calculator: even spacing for railing balusters.","category":"Construction & Measurement"},{"name":"Bandwidth Calculator","path":"/bandwidth-calculator/","description":"Bandwidth calculator: transfer time for a file size at a given connection speed.","category":"Time & Work"},{"name":"Base64 Encoder Decoder","path":"/base64-tool/","description":"Encode and decode Base64 text, with local previews for PNG, JPEG, GIF, and WebP image data.","category":"Converters"},{"name":"Baseball OPS Calculator","path":"/baseball-ops-calculator/","description":"Baseball OPS calculator: on-base percentage plus slugging percentage.","category":"Sports"},{"name":"Baseboard Calculator","path":"/baseboard-calculator/","description":"Baseboard calculator: linear feet and boards for a room.","category":"Construction & Measurement"},{"name":"Battery Bank Calculator","path":"/battery-bank-calculator/","description":"Battery bank calculator: amp-hours for an off-grid system.","category":"Energy & Electrical"},{"name":"Battery Life Calculator","path":"/battery-life-calculator/","description":"Battery life calculator: runtime from battery capacity, voltage, and load power.","category":"Energy & Electrical"},{"name":"Battery Runtime Calculator","path":"/battery-runtime-calculator/","description":"Estimate ideal and adjusted battery runtime from capacity, voltage, load, efficiency, and usable depth.","category":"Energy & Electrical"},{"name":"Batting Average Calculator","path":"/batting-average-calculator/","description":"Batting average calculator: hits divided by at-bats.","category":"Sports"},{"name":"Bayes Theorem Calculator","path":"/bayes-theorem-calculator/","description":"Bayes theorem calculator: posterior probability P(A|B) from prior and likelihood rates.","category":"Statistics"},{"name":"Beam Load Calculator","path":"/beam-load-calculator/","description":"Beam load calculator: max deflection of a uniformly loaded simple beam (simplified).","category":"Construction & Measurement"},{"name":"Bearing Calculator","path":"/bearing-calculator/","description":"Bearing calculator: initial compass bearing between two coordinates.","category":"Geography"},{"name":"Beer ABV Calculator","path":"/beer-abv-calculator/","description":"Beer ABV calculator: alcohol by volume from original and final gravity.","category":"Food & Cooking"},{"name":"Belt Size Calculator","path":"/belt-size-calculator/","description":"Belt size calculator: belt length from waist size.","category":"Converters"},{"name":"Betting Odds Converter","path":"/betting-odds-converter/","description":"Betting odds converter: American, decimal, and fractional odds with implied probability.","category":"Gaming"},{"name":"Big Number Calculator","path":"/big-number-calculator/","description":"Big number calculator: exact arithmetic on numbers up to 10^30.","category":"Everyday Calculators"},{"name":"Billing Rate Calculator","path":"/billing-rate-calculator/","description":"Billing rate calculator: hourly freelance rate from salary.","category":"Time & Work"},{"name":"Binary Calculator","path":"/binary-calculator/","description":"Binary calculator: add, subtract, multiply, and divide binary numbers with decimal results.","category":"School & Education"},{"name":"Binomial Probability Calculator","path":"/binomial-probability-calculator/","description":"Binomial probability calculator: exact and cumulative probabilities for k successes in n trials.","category":"Statistics"},{"name":"Biorhythm Calculator","path":"/biorhythm-calculator/","description":"Biorhythm calculator: physical, emotional, and intellectual cycles from birth date to a target date.","category":"Astrology"},{"name":"Blood Alcohol Content Calculator","path":"/blood-alcohol-content-calculator/","description":"Blood alcohol content (BAC) calculator: Widmark estimate from drinks, weight, and time \\u2014 informational only.","category":"Health"},{"name":"Blood Pressure Category Calculator","path":"/blood-pressure-calculator/","description":"Blood pressure category calculator: classify a systolic/diastolic reading using the AHA categories.","category":"Health"},{"name":"Blood Sugar Converter","path":"/blood-sugar-converter/","description":"Blood sugar converter: convert glucose between mg/dL and mmol/L instantly.","category":"Health"},{"name":"Blood Type Inheritance Calculator","path":"/blood-type-inheritance-calculator/","description":"Blood type inheritance calculator: possible ABO child blood types from two parents.","category":"Biology"},{"name":"Board Foot Calculator","path":"/board-foot-calculator/","description":"Calculate lumber volume in board feet from thickness, width, length, and quantity.","category":"Construction & Measurement"},{"name":"Boat Loan Calculator","path":"/boat-loan-calculator/","description":"Boat loan calculator: boat and RV loan payment.","category":"Finance & Investing"},{"name":"Body Fat Estimate Calculator","path":"/body-fat-calculator/","description":"Estimate adult body-fat percentage with the U.S. Navy circumference method and clear limitations.","category":"Health"},{"name":"Body Surface Area Calculator","path":"/body-surface-area-calculator/","description":"Body surface area calculator: Mosteller formula from height and weight.","category":"Health"},{"name":"Bond Calculator","path":"/bond-calculator/","description":"Estimate a bond's current yield and price from coupon rate, face value, and market rate.","category":"Everyday Calculators"},{"name":"Bonus Percentage Calculator","path":"/bonus-percentage-calculator/","description":"Bonus percentage calculator: bonus from salary and percent.","category":"Time & Work"},{"name":"Bowling Handicap Calculator","path":"/bowling-handicap-calculator/","description":"Bowling handicap calculator: league handicap from average.","category":"Sports"},{"name":"Bra Size Calculator","path":"/bra-size-calculator/","description":"Bra size calculator: band and cup size from underbust and bust measurements.","category":"Health"},{"name":"Break-Even Ratio Calculator","path":"/break-even-ratio-calculator/","description":"Calculate the break-even ratio for a rental property. See what share of income is consumed before cash flow turns positive.","category":"Finance & Investing"},{"name":"Break-Even Units Calculator","path":"/break-even-units-calculator/","description":"Find break-even units instantly: calculate contribution margin, required revenue, and units needed to cover costs and target profit.","category":"Seller & Business"},{"name":"Breaker Size Calculator","path":"/breaker-size-calculator/","description":"Breaker size calculator: breaker amps from load watts.","category":"Energy & Electrical"},{"name":"Brick Calculator","path":"/brick-calculator/","description":"Brick calculator: estimate bricks for a wall from dimensions, brick size, and mortar joints.","category":"Construction & Measurement"},{"name":"Budget Planner Calculator","path":"/budget-planner-calculator/","description":"Budget planner calculator: monthly income minus fixed costs and spending.","category":"Finance & Investing"},{"name":"Buffer Solution Calculator","path":"/buffer-solution-calculator/","description":"Calculate buffer pH using the Henderson-Hasselbalch equation.","category":"Chemistry"},{"name":"Business Days Calculator","path":"/business-days-calculator/","description":"Count weekdays between two dates with an optional number of excluded holidays.","category":"Time & Work"},{"name":"Business Loan Calculator","path":"/business-loan-calculator/","description":"Business loan calculator: SBA-style loan payment.","category":"Finance & Investing"},{"name":"Business Name Generator","path":"/business-name-generator/","description":"Generate business and brand name ideas from your industry and style — privacy-clean, no sign-up.","category":"Generators"},{"name":"C1V1 = C2V2 Calculator","path":"/c1v1-c2v2-calculator/","description":"Solve for concentration or volume in C1V1 = C2V2 dilution equations.","category":"Chemistry"},{"name":"CAGR Calculator","path":"/cagr-calculator/","description":"Calculate compound annual growth rate from starting value, ending value, and elapsed years.","category":"Finance & Investing"},{"name":"CD Calculator","path":"/cd-calculator/","description":"Calculate the maturity value and interest earned on a Certificate of Deposit over its term.","category":"Everyday Calculators"},{"name":"CPM Calculator","path":"/cpm-calculator/","description":"Calculate CPM, campaign cost, impressions, or estimated ad revenue from pageviews and RPM. Any two values solve the third.","category":"Seller & Business"},{"name":"CSV to JSON Converter","path":"/csv-to-json/","description":"Convert CSV to JSON instantly — paste comma or tab-separated data and get a clean JSON array of objects. Free, private, runs in your browser.","category":"Converters"},{"name":"Caffeine Half-Life Calculator","path":"/caffeine-half-life-calculator/","description":"Caffeine half-life calculator: how much caffeine remains in your system over time.","category":"Health"},{"name":"Caffeine Intake Calculator","path":"/caffeine-intake-calculator/","description":"Caffeine intake calculator: total daily caffeine from coffee, tea, energy drinks, and soda.","category":"Food & Cooking"},{"name":"Calorie Calculator","path":"/calorie-calc/","description":"Estimate daily calories and macros from simple inputs.","category":"Health"},{"name":"Calorie Deficit Calculator","path":"/calorie-deficit-calculator/","description":"Calorie deficit calculator: weight-loss timeline from daily deficit and target pounds.","category":"Health"},{"name":"Calorie Target Calculator","path":"/calorie-target-calculator/","description":"Calorie target calculator: maintenance, deficit, and surplus targets from weight, height, age, and activity.","category":"Health"},{"name":"Calories Burned Calculator","path":"/calories-burned-calculator/","description":"Estimate calories burned during exercise using MET values and body weight.","category":"Everyday Calculators"},{"name":"Candy Temperature Calculator","path":"/candy-temperature-calculator/","description":"Candy temperature calculator: sugar stages from temperature.","category":"Food & Cooking"},{"name":"Cap Rate Calculator","path":"/cap-rate-calculator/","description":"Calculate the capitalization rate on a rental property. Enter property value and net operating income (NOI) for unlevered yield.","category":"Finance & Investing"},{"name":"Capacitance Calculator","path":"/capacitance-calculator/","description":"Capacitance calculator: capacitance from stored energy and voltage.","category":"Energy & Electrical"},{"name":"Capital Gains Calculator","path":"/capital-gains-calculator/","description":"Capital gains calculator: tax on an asset sale from sell price, cost basis, and your capital gains rate.","category":"Finance & Investing"},{"name":"Car Insurance Estimator","path":"/car-insurance-estimator/","description":"Car insurance estimator: rough annual premium from vehicle value, driver age, and record.","category":"Vehicles"},{"name":"Car Loan Refinance Calculator","path":"/car-loan-refinance-calculator/","description":"Car loan refinance calculator: monthly savings from refinancing a car loan.","category":"Vehicles"},{"name":"Cash-Flow Runway Calculator","path":"/cash-flow-runway-calculator/","description":"Model monthly cash runway, depletion month, lowest cash, and operating break-even from editable growth assumptions.","category":"Seller & Business"},{"name":"Cash-on-Cash Return Calculator","path":"/cash-on-cash-return-calculator/","description":"Calculate cash-on-cash return on a rental property. Enter annual cash flow and total cash invested for yield on the cash you put in.","category":"Finance & Investing"},{"name":"Cat Age Calculator","path":"/cat-age-calculator/","description":"Cat age calculator: cat years to human years.","category":"Pets"},{"name":"Cat Food Calculator","path":"/cat-food-calculator/","description":"Cat food calculator: daily calories and cups from cat weight.","category":"Pets"},{"name":"Cat Litter Calculator","path":"/cat-litter-calculator/","description":"Cat litter calculator: litter needed for a multi-cat home.","category":"Pets"},{"name":"Ceiling Fan Size Calculator","path":"/ceiling-fan-size-calculator/","description":"Ceiling fan size calculator: blade span by room size.","category":"Construction & Measurement"},{"name":"Ceiling Tile Calculator","path":"/ceiling-tile-calculator/","description":"Ceiling tile calculator: 2x2 drop-ceiling tiles for a room.","category":"Construction & Measurement"},{"name":"Chair Rail Calculator","path":"/chair-rail-calculator/","description":"Chair rail calculator: classic height from ceiling height.","category":"Construction & Measurement"},{"name":"Chargaff Rule Calculator","path":"/chargaff-rule-calculator/","description":"Chargaff rule calculator: predict T, G, and C percentages from adenine percentage in double-stranded DNA.","category":"Biology"},{"name":"Chess Elo Calculator","path":"/chess-elo-calculator/","description":"Chess Elo calculator: expected score and new rating after a game using the standard Elo formula.","category":"Gaming"},{"name":"Chi-Square Goodness of Fit Calculator","path":"/chi-square-calculator/","description":"Chi-square calculator: goodness-of-fit test statistic from observed vs expected counts.","category":"Statistics"},{"name":"Child Care Cost Calculator","path":"/child-care-cost-calculator/","description":"Child care cost calculator: annual cost of daycare or nanny care.","category":"Finance & Investing"},{"name":"Children Size Converter","path":"/children-size-converter/","description":"Children size converter: US to EU kids clothing sizes.","category":"Converters"},{"name":"Chinese Zodiac Calculator","path":"/chinese-zodiac-calculator/","description":"Chinese zodiac calculator: animal sign and element from birth year, with lunar-new-year caveat.","category":"Astrology"},{"name":"Cholesterol Ratio Calculator","path":"/cholesterol-ratio-calculator/","description":"Cholesterol ratio calculator: total-to-HDL and LDL-to-HDL ratios from a lipid panel.","category":"Health"},{"name":"Chord Progression Generator","path":"/chord-progression-generator/","description":"Chord progression generator: common diatonic progressions in any key, computed locally.","category":"Music & Audio"},{"name":"Circle Area Calculator","path":"/circle-area-calculator/","description":"Circle area calculator: area and circumference from radius.","category":"Everyday Calculators"},{"name":"Circle Calculator","path":"/circle-calculator/","description":"Find a circle's area, circumference, diameter, or radius from any one value.","category":"Everyday Calculators"},{"name":"Citation Formatter","path":"/citation-formatter/","description":"Format a book, website, or article into APA and MLA citations from author, title, publisher, year, and URL.","category":"Everyday Calculators"},{"name":"Closing Cost Calculator","path":"/closing-cost-calculator/","description":"Estimate closing costs on a home purchase. Enter price, down payment, and typical fee percentages for an itemized total.","category":"Finance & Investing"},{"name":"Clothing Size Converter","path":"/clothing-size-converter/","description":"Clothing size converter: international clothing size conversion (US, UK, EU).","category":"Travel"},{"name":"Coefficient of Variation Calculator","path":"/coefficient-of-variation-calculator/","description":"Calculate the coefficient of variation (relative standard deviation). 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Privat.","category":"Seller & Business"},{"name":"Expected Value Calculator","path":"/expected-value-calculator/","description":"Expected value calculator: EV from two outcomes with probabilities and values.","category":"Statistics"},{"name":"Expense Split Calculator","path":"/expense-split-calculator/","description":"Expense split calculator: split a bill evenly.","category":"Time & Work"},{"name":"Exponent Calculator","path":"/exponent-calculator/","description":"Calculate a base raised to an exponent, including negative and fractional exponents.","category":"Everyday Calculators"},{"name":"Exponential Growth Calculator","path":"/exponential-growth-calculator/","description":"Exponential growth calculator: value after continuous growth.","category":"Everyday Calculators"},{"name":"Exposure Value Calculator","path":"/exposure-value-calculator/","description":"Exposure value calculator: EV from aperture, shutter speed, and ISO.","category":"Photo & Video"},{"name":"FHA Loan Calculator","path":"/fha-loan-calculator/","description":"FHA loan calculator: payment with mortgage insurance premium (MIP).","category":"Finance & Investing"},{"name":"FPS Sensitivity Converter","path":"/fps-sensitivity-converter/","description":"FPS sensitivity converter: convert mouse sensitivity between games and calculate eDPI and cm/360.","category":"Gaming"},{"name":"FSA Calculator","path":"/fsa-calculator/","description":"FSA calculator: tax savings and what you risk with use-it-or-lose-it.","category":"Finance & Investing"},{"name":"Fabric Yardage Calculator","path":"/fabric-yardage-calculator/","description":"Fabric yardage calculator: yards of fabric for a project.","category":"Construction & Measurement"},{"name":"Facebook Ads Cost Calculator","path":"/facebook-ads-cost-calculator/","description":"Calculate Facebook ads CPM, CPC, CTR, and ROAS from campaign data.","category":"Social Media"},{"name":"Factorial Calculator","path":"/factorial-calculator/","description":"Factorial calculator: n! for any integer up to 170.","category":"Everyday Calculators"},{"name":"Fasting Window Calculator","path":"/fasting-window-calculator/","description":"Fasting window calculator: eating window from fast start and length.","category":"Health"},{"name":"Federal Income Tax Calculator","path":"/federal-income-tax-calculator/","description":"Federal income tax calculator: 2026 federal brackets with standard deduction.","category":"Finance & Investing"},{"name":"Fence Material Calculator","path":"/fence-material-calculator/","description":"Estimate fence sections, posts, rails, and pickets from run length and spacing.","category":"Construction & Measurement"},{"name":"Fence Post Calculator","path":"/fence-post-calculator/","description":"Fence post calculator: posts and rails for a fence run.","category":"Construction & Measurement"},{"name":"Fetal Weight Calculator","path":"/fetal-weight-calculator/","description":"Fetal weight calculator: estimated baby weight from ultrasound (Hadlock).","category":"Health"},{"name":"Fibonacci Calculator","path":"/fibonacci-calculator/","description":"Fibonacci calculator: nth Fibonacci number.","category":"Everyday Calculators"},{"name":"Field Goal Probability Calculator","path":"/field-goal-probability-calculator/","description":"Field goal probability calculator: estimated make probability from kick distance.","category":"Sports"},{"name":"Final Exam Grade Calculator","path":"/final-exam-calculator/","description":"See the exact score you need on your final exam to reach your desired course grade.","category":"School & Education"},{"name":"Five Number Summary Calculator","path":"/five-number-summary-calculator/","description":"Five number summary calculator: min, quartiles, median, max, IQR and outliers.","category":"Statistics"},{"name":"Fix and Flip Profit Calculator","path":"/fix-and-flip-profit-calculator/","description":"Project full profit on a fix-and-flip. 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temperatures.","category":"Food & Cooking"},{"name":"Food Storage Time Calculator","path":"/food-storage-time-calculator/","description":"Food storage time guide: safe refrigerator and freezer storage times for common foods.","category":"Food & Cooking"},{"name":"Force Calculator","path":"/force-calculator/","description":"Calculate force, mass, or acceleration using Newton's second law (F = ma).","category":"Physics"},{"name":"Fraction Operations Calculator","path":"/fraction-operations-calculator/","description":"Fraction operations calculator: add, subtract, multiply, divide fractions.","category":"Everyday Calculators"},{"name":"Fraction to Decimal Calculator","path":"/fraction-to-decimal-calculator/","description":"Fraction to decimal calculator: numerator over denominator as a decimal and percent.","category":"School & Education"},{"name":"Fractions Calculator","path":"/fractions-calculator/","description":"Add, subtract, multiply, or divide two fractions and get the simplified 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numbers.","category":"Everyday Calculators"},{"name":"GDP Calculator","path":"/gdp-calculator/","description":"GDP calculator: gross domestic product from consumption, investment, government, and net exports.","category":"Finance & Investing"},{"name":"GFR Calculator","path":"/gfr-calculator/","description":"eGFR calculator (CKD-EPI 2021): estimated kidney filtration rate from creatinine, age, and sex.","category":"Health"},{"name":"GPA Calculator","path":"/gpa-calculator/","description":"Calculate your GPA on a standard 4.0 scale from course letter grades and credits. Local, private, no upload.","category":"School & Education"},{"name":"Gacha Pity Calculator","path":"/gacha-pity-calculator/","description":"Gacha pity calculator: honest odds of pulling the featured item within N pulls.","category":"Gaming"},{"name":"Garage Size Calculator","path":"/garage-size-calculator/","description":"Garage size calculator: minimum dimensions by car count.","category":"Construction & Measurement"},{"name":"Gas Budget Calculator","path":"/gas-budget-calculator/","description":"Gas budget calculator: monthly and yearly fuel spending.","category":"Vehicles"},{"name":"Gas Laws Calculator","path":"/gas-laws-calculator/","description":"Apply Boyle's, Charles', and the Ideal Gas Law to gas properties.","category":"Chemistry"},{"name":"Gas Mileage Calculator","path":"/gas-mileage-calculator/","description":"Calculate miles per gallon or liters per 100 km from distance and fuel used.","category":"Everyday Calculators"},{"name":"General and Scientific 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loans.","category":"Finance & Investing"},{"name":"Loan-to-Value Calculator","path":"/loan-to-value-calculator/","description":"Calculate your loan-to-value (LTV) ratio. Enter loan amount and property value to see equity position and PMI risk.","category":"Finance & Investing"},{"name":"Local Income Tax Calculator","path":"/local-income-tax-calculator/","description":"Local income tax calculator: which states levy county or city income taxes.","category":"Finance & Investing"},{"name":"Logarithm Calculator","path":"/log-calculator/","description":"Calculate the logarithm of a number in any base, or natural log.","category":"Everyday Calculators"},{"name":"Logarithm Calculator","path":"/logarithm-calculator/","description":"Logarithm calculator: log base 10, 2, e, or any custom base of a number, with the inverse check.","category":"Generators"},{"name":"Long Division Calculator","path":"/long-division-calculator/","description":"Long division calculator: quotient and remainder with the steps shown.","category":"School & Education"},{"name":"Loot Box EV Calculator","path":"/loot-box-ev-calculator/","description":"Loot box expected value calculator: what a box is really worth from drop odds and item values.","category":"Gaming"},{"name":"Loot Drop Probability Calculator","path":"/loot-drop-probability-calculator/","description":"Loot drop probability calculator: chance of at least one drop after N attempts at a given drop rate.","category":"Gaming"},{"name":"Lottery Odds Calculator","path":"/lottery-odds-calculator/","description":"Lottery odds calculator: jackpot odds for any 5+1 or 6-number game.","category":"Gaming"},{"name":"Love Compatibility Calculator","path":"/love-calculator/","description":"Love compatibility calculator: a fun, deterministic name-based score. 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Enter loan, rate, term, and overpayments for a private estimate.","category":"Finance & Investing"},{"name":"Mortgage Payment Calculator","path":"/mortgage-payment-calculator/","description":"Estimate your monthly mortgage payment including principal, interest, taxes, and insurance. Enter loan amount, rate, and term for a full breakdown. Private.","category":"Finance & Investing"},{"name":"Mortgage Payoff Calculator","path":"/mortgage-payoff-calculator/","description":"Mortgage payoff calculator: payoff date and interest saved with extra payments.","category":"Finance & Investing"},{"name":"Mortgage Refinance Break-Even Calculator","path":"/mortgage-refinance-break-even/","description":"Compare old and new mortgage payments and estimate refinance break-even time.","category":"Finance & Investing"},{"name":"Moving Average Calculator","path":"/moving-average-calculator/","description":"Moving average calculator: simple moving average of a series.","category":"Statistics"},{"name":"Mulch Calculator","path":"/mulch-calculator/","description":"Mulch calculator: cubic yards and bags for garden beds.","category":"Construction & Measurement"},{"name":"Mulch and Soil Calculator","path":"/mulch-soil-calculator/","description":"Estimate cubic yards of mulch or soil from area, depth, and waste allowance.","category":"Construction & Measurement"},{"name":"Music Interval Calculator","path":"/music-interval-calculator/","description":"Music interval calculator: interval name and semitone distance between two notes.","category":"Music & Audio"},{"name":"NFL Passer Rating Calculator","path":"/passer-rating-calculator/","description":"NFL passer rating calculator: QB rating from attempts, completions, yards, touchdowns, and interceptions.","category":"Sports"},{"name":"Natural Log Calculator","path":"/natural-log-calculator/","description":"Natural log calculator: ln(x) and e^x.","category":"Everyday Calculators"},{"name":"Net Carbs Calculator","path":"/net-carbs-calculator/","description":"Net carbs calculator: carbs minus fiber and sugar alcohols.","category":"Food & Cooking"},{"name":"Net Operating Income Calculator","path":"/net-operating-income-calculator/","description":"Calculate net operating income (NOI) for a rental property. Enter rental income and operating expenses, before the mortgage.","category":"Finance & Investing"},{"name":"Net Present Value Calculator","path":"/net-present-value-calculator/","description":"Net present value calculator: NPV of a yearly cash flow at a discount rate.","category":"Finance & Investing"},{"name":"Net Worth Calculator","path":"/net-worth-calculator/","description":"Add up your assets and liabilities to find your net worth.","category":"Everyday Calculators"},{"name":"Normal Distribution Probability Calculator","path":"/normal-distribution-probability-calculator/","description":"Normal distribution probability calculator: area under the curve for a value, above a value, or between two values.","category":"Statistics"},{"name":"Nth Root Calculator","path":"/nth-root-calculator/","description":"Nth root calculator: the n-th root of a number.","category":"Everyday Calculators"},{"name":"Numbers to Words Converter","path":"/numbers-to-words/","description":"Convert any whole number into English words ,  for checks, contracts, and homework.","category":"Everyday Calculators"},{"name":"Numerology Life Path Calculator","path":"/numerology-life-path-calculator/","description":"Numerology life path calculator: reduce a birth date to its life path number, master numbers kept.","category":"Astrology"},{"name":"Numerology Name Number Calculator","path":"/numerology-name-number-calculator/","description":"Numerology name number calculator: Pythagorean letter values for any name, entertainment only.","category":"Astrology"},{"name":"Octal Converter","path":"/octal-converter/","description":"Octal converter: decimal, binary, octal and hex.","category":"Converters"},{"name":"Odds Ratio Calculator","path":"/odds-ratio-calculator/","description":"Odds ratio calculator: association from a 2x2 table.","category":"Statistics"},{"name":"Ohm's Law Calculator","path":"/ohms-law-calculator/","description":"Calculate voltage, current, resistance, or power using Ohm's law.","category":"Everyday Calculators"},{"name":"On Call Pay Calculator","path":"/on-call-pay-calculator/","description":"On call pay calculator: compensation for on-call hours.","category":"Time & Work"},{"name":"One Rep Max Calculator","path":"/one-rep-max-calculator/","description":"Estimate your one-rep max from a submaximal lift.","category":"Everyday Calculators"},{"name":"Orbital Period Calculator","path":"/orbital-period-calculator/","description":"Orbital period calculator: circular orbit period around Earth from altitude (Kepler).","category":"Astronomy"},{"name":"Order of Operations Calculator (PEMDAS)","path":"/order-of-operations-calculator/","description":"Evaluate math expressions with the correct order of operations (PEMDAS): parentheses, exponents, multiplication and division, then addition and subtraction.","category":"Everyday Calculators"},{"name":"Outlier Calculator","path":"/outlier-calculator/","description":"Outlier calculator: flag outliers by the 1.5x IQR rule.","category":"Statistics"},{"name":"Oven Conversion Calculator","path":"/oven-conversion-calculator/","description":"Oven conversion calculator: conventional to convection.","category":"Food & Cooking"},{"name":"Oven Temperature Converter","path":"/oven-temperature-converter/","description":"Oven temperature converter: Fahrenheit, Celsius, and UK gas marks.","category":"Food & Cooking"},{"name":"Overtime Calculator","path":"/overtime-calculator/","description":"Estimate regular and overtime pay with editable thresholds and overtime multipliers.","category":"Time & Work"},{"name":"Ovulation Calculator","path":"/ovulation-calculator/","description":"Estimate your fertile window and ovulation date based on cycle length and last period.","category":"Everyday Calculators"},{"name":"P Value Calculator","path":"/p-value-calculator/","description":"P value calculator: two-tailed p-value from a z-score.","category":"Statistics"},{"name":"PDF to JPG Converter","path":"/pdf-to-jpg/","description":"Convert PDF pages to images directly in your browser.","category":"Converters"},{"name":"PE Ratio Calculator","path":"/pe-ratio-calculator/","description":"PE ratio calculator: price-to-earnings from price and EPS.","category":"Finance & Investing"},{"name":"PTO Accrual Calculator","path":"/pto-accrual-calculator/","description":"PTO accrual calculator: vacation hours per year from a pay-period rate.","category":"Time & Work"},{"name":"Pace Calculator","path":"/pace-calculator/","description":"Calculate your running pace per km or mile from distance and time, plus speed and predicted race times.","category":"Health"},{"name":"Packing Weight Calculator","path":"/packing-weight-calculator/","description":"Packing weight calculator: total luggage weight from item counts and typical weights.","category":"Travel"},{"name":"Paint Calculator","path":"/paint-calculator/","description":"Estimate how many gallons of paint you need for walls, doors, and trim. Covers two coats and accounts for waste.","category":"Construction & Measurement"},{"name":"Paint Cost Per Square Foot Calculator","path":"/paint-cost-per-square-foot/","description":"Estimate paint cost per square foot or the total to paint a room from your own rate.","category":"Everyday Calculators"},{"name":"Paint Coverage Calculator","path":"/paint-coverage-calculator/","description":"Estimate paintable wall area and gallons needed after subtracting doors and windows.","category":"Construction & Measurement"},{"name":"Parallelogram Area Calculator","path":"/parallelogram-area-calculator/","description":"Parallelogram area calculator: area from base and height.","category":"Everyday Calculators"},{"name":"Parking Cost Calculator","path":"/parking-cost-calculator/","description":"Parking cost calculator: daily vs monthly pass comparison for commuters.","category":"Travel"},{"name":"Parlay Odds Calculator","path":"/parlay-odds-calculator/","description":"Parlay odds calculator: combined odds and implied probability for multi-leg bets.","category":"Gaming"},{"name":"Password Generator","path":"/password-generator/","description":"Generate strong random passwords with configurable length and character sets, with entropy and strength rating. Local and private.","category":"Text & Developer Tools"},{"name":"Patio Paver Calculator","path":"/patio-paver-calculator/","description":"Patio paver calculator: pavers needed with waste.","category":"Construction & Measurement"},{"name":"Paver Calculator","path":"/paver-calculator/","description":"Estimate paver count, base aggregate, bedding sand, waste, and optional paver cost.","category":"Construction & Measurement"},{"name":"PayPal & Stripe Fee Calculator","path":"/payment-fee-calculator/","description":"Calculate PayPal and Stripe fees, net proceeds, or the amount to charge. Use editable presets for Stripe 2.9% + $0.30 and PayPal 3.49% + $0.49.","category":"Seller & Business"},{"name":"PayPal Fee Calculator","path":"/paypal-fee-calculator/","description":"Calculate estimated PayPal fees, net proceeds, or the amount to charge for a target net. Starts with an editable 3.49% + $0.49 planning preset.","category":"Everyday Calculators"},{"name":"Paycheck After Tax Calculator","path":"/paycheck-calc/","description":"Estimate 2026 federal and FICA withholding with clearly labeled state planning estimates.","category":"Finance & Investing"},{"name":"Payload and Towing Calculator","path":"/payload-towing-calculator/","description":"Payload and towing calculator: remaining payload from GVWR, curb weight, passengers, and cargo.","category":"Vehicles"},{"name":"Payment Terms Generator","path":"/payment-terms-generator/","description":"Draft plain-language payment terms for invoices, quotes, retainers, deposits, late fees, and due dates.","category":"Generators"},{"name":"Payout Ratio Calculator","path":"/payout-ratio-calculator/","description":"Payout ratio calculator: dividends as a share of earnings.","category":"Finance & Investing"},{"name":"Pension Calculator","path":"/pension-calculator/","description":"Estimate a monthly pension benefit from salary, years of service, and a multiplier.","category":"Everyday Calculators"},{"name":"Percent Difference Calculator","path":"/percent-difference-calculator/","description":"Percent difference calculator: relative difference between two values.","category":"Everyday Calculators"},{"name":"Percent Off Calculator","path":"/discount-percent-off-calculator/","description":"Calculate stacked percent-off discounts, apply a coupon, then add tax to see your final sale price.","category":"Seller & Business"},{"name":"Percent Solution Calculator","path":"/percent-solution-calculator/","description":"Calculate percent solution concentration by weight or volume.","category":"Chemistry"},{"name":"Percent Yield Calculator","path":"/percent-yield-calculator/","description":"Calculate percent yield from actual and theoretical yield.","category":"Chemistry"},{"name":"Percentage Calculator","path":"/percentage-calc/","description":"Calculate percentages, increases, and changes instantly.","category":"Finance & Investing"},{"name":"Percentage Change Calculator","path":"/percentage-change-calculator/","description":"Percentage change calculator: the % increase or decrease between two values.","category":"Everyday Calculators"},{"name":"Percentage Error Calculator","path":"/percentage-error-calculator/","description":"Percentage error calculator: measured vs true value as a percentage, for labs and measurements.","category":"Statistics"},{"name":"Percentage Markup Calculator","path":"/percentage-markup-calculator/","description":"Enter a cost and markup percentage to get the selling price, markup amount, and profit margin. What is a 15% markup on $85? It is $97.75.","category":"Everyday Calculators"},{"name":"Percentile Calculator","path":"/percentile-calculator/","description":"Find the value at any percentile in a data set, or the percentile rank of a given value. Enter your data and the percentile you need.","category":"Everyday Calculators"},{"name":"Period Cycle Calculator","path":"/period-cycle-calculator/","description":"Period cycle calculator: estimate the next period and fertile window from cycle length.","category":"Health"},{"name":"Permutation Combination Calculator","path":"/permutation-combination-calculator/","description":"Permutation and combination calculator: nPr and nCr.","category":"Statistics"},{"name":"Permutations Calculator (nPr)","path":"/permutations-calculator/","description":"Calculate the number of permutations (nPr) of arranging r items from n, with the formula explained.","category":"Everyday Calculators"},{"name":"Personal Loan Calculator","path":"/personal-loan-calculator/","description":"Personal loan calculator: monthly payment with origination fee.","category":"Finance & Investing"},{"name":"Pet Annual Cost Calculator","path":"/pet-annual-cost-calculator/","description":"Pet annual cost calculator: yearly dog or cat expenses.","category":"Pets"},{"name":"Pipe Sizing Calculator","path":"/pipe-sizing-calculator/","description":"Pipe sizing calculator: minimum pipe diameter for a target flow rate and velocity.","category":"Construction & Measurement"},{"name":"Pipe Volume Calculator","path":"/pipe-volume-calculator/","description":"Pipe volume calculator: volume of water in a pipe from diameter and length.","category":"Construction & Measurement"},{"name":"Pizza Dough Calculator","path":"/pizza-dough-calculator/","description":"Pizza dough calculator: flour, water, salt, yeast by baker's percentage.","category":"Food & Cooking"},{"name":"Planetary Weight Calculator","path":"/planetary-weight-calculator/","description":"Planetary weight calculator: your weight on other planets and moons from surface gravity ratios.","category":"Astronomy"},{"name":"Plank Test Calculator","path":"/plank-test-calculator/","description":"Plank test calculator: core endurance rating from hold time.","category":"Sports"},{"name":"Poisson Probability Calculator","path":"/poisson-probability-calculator/","description":"Poisson probability calculator: probability of exactly k events given a mean rate.","category":"Statistics"},{"name":"Pollen Forecast Calculator","path":"/pollen-forecast-calculator/","description":"Pollen forecast calculator: current pollen levels for any city.","category":"Health"},{"name":"Polynomial Evaluator","path":"/polynomial-evaluator/","description":"Polynomial evaluator: evaluate ax² + bx + c at x.","category":"Everyday Calculators"},{"name":"Pomodoro Timer","path":"/pomodoro-timer/","description":"Focus with work and break intervals — set focus minutes, short and long breaks, and run the Pomodoro timer in your browser. Free, no signup.","category":"Time & Work"},{"name":"Pond Volume Calculator","path":"/pond-volume-calculator/","description":"Pond volume calculator: gallons in a rectangular pond.","category":"Construction & Measurement"},{"name":"Pool Volume Calculator","path":"/pool-volume-calculator/","description":"Pool volume calculator: gallons in a rectangular, round, or oval pool.","category":"Construction & Measurement"},{"name":"Population Density Calculator","path":"/population-density-calculator/","description":"Population density calculator: people per square kilometer or mile from population and area.","category":"Geography"},{"name":"Portion Size Calculator","path":"/portion-size-calculator/","description":"Portion size calculator: scale a recipe's serving size to a new number of portions.","category":"Food & Cooking"},{"name":"Poshmark Fee Calculator","path":"/poshmark-fee-calculator/","description":"Poshmark fee calculator: selling fees and net for any sale price.","category":"Seller & Business"},{"name":"Post Frequency Calculator","path":"/post-frequency-calculator/","description":"Plan a sustainable social posting cadence across platforms.","category":"Social Media"},{"name":"Potential Energy Calculator","path":"/potential-energy-calculator/","description":"Calculate gravitational potential energy from mass, height, and gravity (PE = mgh).","category":"Physics"},{"name":"Power Factor Calculator","path":"/power-factor-calculator/","description":"Power factor calculator: PF from real watts and apparent volt-amps.","category":"Energy & Electrical"},{"name":"Pregnancy Calculator","path":"/pregnancy-calculator/","description":"Estimate your pregnancy due date and current week from your last period, conception date, or a known due date. Private, no account.","category":"Health"},{"name":"Pregnancy Due Date Calculator","path":"/pregnancy-due-date-calculator/","description":"Pregnancy due date calculator: estimate the due date from the first day of the last menstrual period.","category":"Health"},{"name":"Pregnancy Weight Gain Calculator","path":"/pregnancy-weight-gain-calculator/","description":"Pregnancy weight gain calculator: IOM recommended ranges by BMI and week.","category":"Health"},{"name":"Present Value Calculator","path":"/present-value-calculator/","description":"Find what a future lump sum is worth today at a given discount rate.","category":"Everyday Calculators"},{"name":"Pressure Calculator","path":"/pressure-calculator/","description":"Calculate pressure from force and area (P = F/A) with pascal and psi results.","category":"Physics"},{"name":"Pressure Converter","path":"/pressure-converter/","description":"Pressure converter: psi, bar, kPa, atm.","category":"Converters"},{"name":"Pressure Cooker Time Calculator","path":"/pressure-cooker-time-calculator/","description":"Pressure cooker time calculator: cooking times for common foods.","category":"Food & Cooking"},{"name":"Price Increase Impact Calculator","path":"/price-increase-impact-calculator/","description":"Compare revenue and contribution after a price change and expected unit-volume response.","category":"Seller & Business"},{"name":"Price Per Square Foot Calculator","path":"/price-per-square-foot/","description":"Work out price per square foot, or back into total price or area from a rate and budget.","category":"Everyday Calculators"},{"name":"Price-to-Rent Ratio Calculator","path":"/price-to-rent-ratio-calculator/","description":"Calculate the price-to-rent ratio. Enter home price and annual rent to see the classic buy-vs-rent market signal.","category":"Finance & Investing"},{"name":"Prime Checker","path":"/prime-checker/","description":"Prime checker: is a number prime, with factors.","category":"Everyday Calculators"},{"name":"Prime Factorization Calculator","path":"/prime-factorization-calculator/","description":"Prime factorization calculator: prime factors with exponents for any number.","category":"School & Education"},{"name":"Print Size Calculator","path":"/print-size-calculator/","description":"Print size calculator: compute print dimensions and PPI from pixel dimensions and physical print size.","category":"Photo & Video"},{"name":"Printable Calendar","path":"/printable-calendar/","description":"Create a clean six-week monthly calendar with Sunday or Monday week starts, then print it or save it as a PDF.","category":"Time & Work"},{"name":"Prize Wheel Spinner","path":"/prize-wheel/","description":"Spin a prize wheel to randomly choose a winner from segments you add. Local browser randomness, no upload.","category":"Everyday Calculators"},{"name":"Product Description Generator","path":"/product-description-generator/","description":"Generate a ready-to-use product description from your product, benefit, feature, and audience.","category":"Generators"},{"name":"Profit Margin and Markup Calculator","path":"/profit-margin-markup-calculator/","description":"Calculate profit, profit margin, markup on cost, and the selling price needed for a target margin from your cost and price.","category":"Seller & Business"},{"name":"Project Quote Calculator","path":"/project-quote-calculator/","description":"Project quote calculator: labor plus materials estimate.","category":"Time & Work"},{"name":"Property Area Calculator","path":"/property-area-calculator/","description":"Convert property and land area between square feet, square meters, acres, hectares, and square yards.","category":"Real Estate"},{"name":"Property Management Fee Calculator","path":"/property-management-fee-calculator/","description":"Property management fee calculator: monthly and annual management fees plus a lease placement fee.","category":"Real Estate"},{"name":"Property Tax Calculator","path":"/property-tax-calculator/","description":"Estimate annual property tax from assessed value, tax rate, and exemptions for budgeting.","category":"Real Estate"},{"name":"Proportion Solver","path":"/proportion-solver/","description":"Proportion solver: solve a/b = c/d for the unknown.","category":"Everyday Calculators"},{"name":"Prorated Rent Calculator","path":"/prorated-rent-calculator/","description":"Prorated rent calculator: how much rent to charge for a partial month move-in or move-out.","category":"Real Estate"},{"name":"Protein Molecular Weight Calculator","path":"/protein-molecular-weight-calculator/","description":"Protein molecular weight calculator: approximate mass from amino acid chain length.","category":"Biology"},{"name":"Protein Shake Calculator","path":"/protein-shake-calculator/","description":"Protein shake calculator: protein per shake from scoops.","category":"Health"},{"name":"Pulse Pressure Calculator","path":"/pulse-pressure-calculator/","description":"Pulse pressure calculator: the gap between systolic and diastolic.","category":"Health"},{"name":"Punnett Square Calculator","path":"/punnett-square-calculator/","description":"Punnett square calculator: monohybrid cross offspring genotype and phenotype probabilities.","category":"Biology"},{"name":"Puppy Adult Weight Calculator","path":"/puppy-adult-weight-calculator/","description":"Puppy adult weight calculator: predicted adult weight from current age and weight.","category":"Pets"},{"name":"Puppy Age Calculator","path":"/puppy-age-calculator/","description":"Dog age calculator: dog years to human years (AAHA method).","category":"Pets"},{"name":"Puppy Breed Size Calculator","path":"/puppy-breed-size-calculator/","description":"Puppy breed size calculator: adult weight by breed category.","category":"Pets"},{"name":"Push Up Test Calculator","path":"/push-up-test-calculator/","description":"Push up test calculator: fitness rating by age and reps.","category":"Sports"},{"name":"Pythagorean Theorem Calculator","path":"/pythagorean-theorem-calculator/","description":"Find the missing side of a right triangle using a² + b² = c².","category":"Everyday Calculators"},{"name":"QR Code Generator","path":"/qr-generator/","description":"Generate a QR code and download a PNG.","category":"Generators"},{"name":"Quadratic Formula Calculator","path":"/quadratic-formula-calculator/","description":"Solve a quadratic equation ax² + bx + c = 0 and see the roots.","category":"Everyday Calculators"},{"name":"Quarter Mile Time Calculator","path":"/quarter-mile-time-calculator/","description":"Quarter-mile time calculator: estimated ET and trap speed from horsepower and weight.","category":"Vehicles"},{"name":"Quarterback Rating Calculator","path":"/quarterback-rating-calculator/","description":"Quarterback rating calculator: NFL passer rating from attempts, completions, yards, touchdowns, and interceptions.","category":"Sports"},{"name":"Quartile Calculator","path":"/quartile-calculator/","description":"Calculate the first (Q1), second (median/Q2), and third (Q3) quartiles plus the interquartile range (IQR) of a data set.","category":"Everyday Calculators"},{"name":"Quote / Estimate Generator","path":"/quote-estimate-generator/","description":"Create a simple service quote or estimate with line items, taxes, deposits, payment terms, and a copyable client summary.","category":"Generators"},{"name":"RC Time Constant Calculator","path":"/rc-time-constant-calculator/","description":"RC time constant calculator: charge/discharge time constant and charge percentage.","category":"Energy & Electrical"},{"name":"RGB to Hex Converter","path":"/rgb-to-hex-calculator/","description":"RGB to hex converter: convert red, green, blue values (0–255) to a #RRGGBB hex color instantly.","category":"Colors & Design"},{"name":"RMD Calculator","path":"/rmd-calculator/","description":"Estimate the Required Minimum Distribution from a retirement account at age 73+.","category":"Everyday Calculators"},{"name":"Raffle Odds Calculator","path":"/raffle-odds-calculator/","description":"Raffle odds calculator: win probability from tickets you hold vs total sold.","category":"Gaming"},{"name":"Rain Barrel Calculator","path":"/rain-barrel-calculator/","description":"Rain barrel calculator: gallons collected from roof runoff.","category":"Construction & Measurement"},{"name":"Raise Percentage Calculator","path":"/raise-percentage-calculator/","description":"Raise percentage calculator: new salary after a percent raise.","category":"Time & Work"},{"name":"Raised Bed Soil Calculator","path":"/raised-bed-soil-calculator/","description":"Raised bed soil calculator: soil volume for a garden bed.","category":"Construction & Measurement"},{"name":"Random Name Picker","path":"/random-name-picker/","description":"Draw one name from a list of names you enter, using unbiased local browser randomness. Add names one per line, then pick.","category":"Everyday Calculators"},{"name":"Random Number Generator","path":"/random-number-generator/","description":"Generate one or up to 100 random integers from a custom range using unbiased local browser randomness.","category":"Everyday Calculators"},{"name":"Random Quote Generator","path":"/random-quote-generator/","description":"Get random motivational and wisdom quotes by topic, instantly and without an account.","category":"Generators"},{"name":"Random Team Splitter","path":"/random-team-splitter/","description":"Split any list of names into balanced random teams instantly. Choose team count or members per team — runs entirely in your browser.","category":"Everyday Calculators"},{"name":"Reaction Rate Calculator","path":"/reaction-rate-calculator/","description":"Calculate reaction rate from concentration change over time.","category":"Chemistry"},{"name":"Readability Calculator","path":"/readability/","description":"Score text readability and grade level.","category":"Text & Developer Tools"},{"name":"Reading Speed Calculator","path":"/reading-speed-calculator/","description":"Reading speed calculator: words per minute and book reading time.","category":"School & Education"},{"name":"Reading Time Calculator","path":"/reading-time-calculator/","description":"Reading time calculator: how long a text takes to read at your words-per-minute pace.","category":"School & Education"},{"name":"Real Estate Cash Flow Calculator","path":"/cash-flow-calculator/","description":"Estimate your monthly real estate cash flow. Enter rental income and all operating costs to see positive or negative cash flow. Private.","category":"Finance & Investing"},{"name":"Receipt Generator","path":"/receipt-generator/","description":"Create a simple payment receipt with payer, seller, items, tax, payment method, and a copyable receipt summary.","category":"Generators"},{"name":"Recipe Divider Calculator","path":"/recipe-divider-calculator/","description":"Recipe divider calculator: split a recipe into fractions (half, third, quarter) with each ingredient scaled.","category":"Food & Cooking"},{"name":"Regex Tester","path":"/regex-tester/","description":"Test a regular expression pattern against a string, see highlighted matches and a live match count, all in your browser.","category":"Everyday Calculators"},{"name":"Remainder Calculator","path":"/remainder-calculator/","description":"Remainder calculator: quotient and remainder of a division.","category":"Everyday Calculators"},{"name":"Renovation Calculator","path":"/renovation-calculator/","description":"Estimate renovation return on investment by comparing project cost, value added, and resale assumptions.","category":"Real Estate"},{"name":"Rent Affordability Calculator","path":"/rent-affordability-calculator/","description":"Estimate affordable rent using your income, chosen cap, debt, and savings. Your suggested maximum is the lower of the income cap or cash available.","category":"Finance & Investing"},{"name":"Rent Split Calculator","path":"/rent-split-calculator/","description":"Rent split calculator: divide rent fairly by each roommate's income.","category":"Finance & Investing"},{"name":"Rent vs. Buy Calculator","path":"/rent-vs-buy-calculator/","description":"Compare modeled buyer equity with a renter investment portfolio using explicit monthly cash flows.","category":"Finance & Investing"},{"name":"Rent-to-Value Calculator","path":"/rent-to-value-calculator/","description":"Calculate the rent-to-value ratio and the 1% rule. Enter property value and monthly rent to screen a rental fast.","category":"Finance & Investing"},{"name":"Rental Car Cost Calculator","path":"/rental-car-cost-calculator/","description":"Rental car cost calculator: full rental cost including insurance, gas, and daily rate.","category":"Travel"},{"name":"Rental Cash Flow Calculator","path":"/rental-cash-flow-calculator/","description":"Rental cash flow calculator: monthly net cash flow after all costs.","category":"Real Estate"},{"name":"Rental Property ROI Calculator","path":"/rental-property-roi-calculator/","description":"Estimate total return on a rental property. Combine cash flow, loan paydown, and appreciation over your holding period.","category":"Finance & Investing"},{"name":"Rental Yield Calculator","path":"/rental-yield-calculator/","description":"Calculate gross rental yield. 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Simple interest applies only to the original principal.","category":"Everyday Calculators"},{"name":"Simplify Fractions Calculator","path":"/fraction-simplify-calculator/","description":"Reduce any fraction to lowest terms with the GCD shown, plus decimal and mixed-number forms.","category":"Everyday Calculators"},{"name":"Sit Up Test Calculator","path":"/sit-up-test-calculator/","description":"Sit up test calculator: abdominal endurance rating.","category":"Sports"},{"name":"Sitemap Validator","path":"/sitemap-validate/","description":"Validate XML sitemap and robots basics.","category":"Converters"},{"name":"Skewness Calculator","path":"/skewness-calculator/","description":"Skewness calculator: asymmetry of a sample distribution.","category":"Statistics"},{"name":"Ski Length Calculator","path":"/ski-length-calculator/","description":"Ski length calculator: recommended ski length from height and style.","category":"Sports"},{"name":"Sleep Cycle Calculator","path":"/sleep-cycle-calculator/","description":"Sleep cycle calculator: find ideal bedtimes that end on a 90-minute sleep cycle for your wake time.","category":"Health"},{"name":"Sleep Cycle Calculator","path":"/sleep-calculator/","description":"Sleep cycle calculator: best bedtime to wake refreshed in 90-minute cycles.","category":"Health"},{"name":"Sleep Debt Calculator","path":"/sleep-debt-calculator/","description":"Sleep debt calculator: accumulated lost sleep from target hours, actual hours, and days tracked.","category":"Health"},{"name":"Sleep Length Calculator","path":"/sleep-length-calculator/","description":"Sleep length calculator: hours and minutes from sleep cycles, plus when to wake.","category":"Health"},{"name":"Slogan Generator","path":"/slogan-generator/","description":"Generate brand slogan and tagline ideas from your business, benefit, and industry.","category":"Generators"},{"name":"Slope Calculator","path":"/slope-calculator/","description":"Slope calculator: degrees, percent grade, and ratio from rise and run.","category":"Construction & Measurement"},{"name":"Slope Intercept Calculator","path":"/slope-intercept-calculator/","description":"Slope intercept calculator: y = mx + b from two points.","category":"Everyday Calculators"},{"name":"Slug Generator","path":"/slug-generator/","description":"Turn any headline or phrase into a clean, URL-friendly slug instantly in your browser. SEO-ready output with a one-click copy.","category":"Text & Developer Tools"},{"name":"Smoker Time Calculator","path":"/smoker-time-calculator/","description":"Smoker time calculator: smoking time by cut at 225°F.","category":"Food & Cooking"},{"name":"Soccer Speed Calculator","path":"/soccer-speed-calculator/","description":"Soccer speed calculator: sprint speed from distance and time.","category":"Sports"},{"name":"Social Media Earnings Calculator","path":"/social-media-earnings-calculator/","description":"Estimate potential income from social platforms and sponsorship value.","category":"Social Media"},{"name":"Social Media Engagement Rate Calculator","path":"/social-media-engagement-rate-calculator/","description":"Calculate engagement rate from likes, comments, shares, and reach or followers, and compare against typical benchmarks.","category":"Everyday Calculators"},{"name":"Social Security Break Even 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sample or population standard deviation, variance, mean, and margin of error for any set of numbers.","category":"Everyday Calculators"},{"name":"Standard Error Calculator","path":"/standard-error-calculator/","description":"Calculate the standard error of the mean (SEM). Enter sample standard deviation and size to measure how precise the sample mean is.","category":"Everyday Calculators"},{"name":"Standing Desk Calculator","path":"/standing-desk-calculator/","description":"Standing desk calculator: desk, chair, and monitor heights from your height.","category":"Time & Work"},{"name":"Star Magnitude Calculator","path":"/star-magnitude-calculator/","description":"Star magnitude calculator: brightness ratio between two apparent magnitudes.","category":"Astronomy"},{"name":"Statistics Calculator","path":"/statistics-calculator/","description":"Compute descriptive statistics for a sample or population: mean, median, mode, range, sum, count, standard deviation, variance, and geometric mean.","category":"Everyday Calculators"},{"name":"Steak Doneness Calculator","path":"/steak-doneness-calculator/","description":"Steak doneness calculator: internal temperature guide.","category":"Food & Cooking"},{"name":"Stellar Temperature Calculator","path":"/stellar-temperature-calculator/","description":"Stellar temperature calculator: blackbody temperature from peak wavelength (Wien's law).","category":"Astronomy"},{"name":"Steps to Miles Calculator","path":"/steps-to-miles-calculator/","description":"Steps to miles calculator: distance walked and calories burned from step count.","category":"Health"},{"name":"Stock Return Calculator","path":"/stock-return-calculator/","description":"Stock return calculator: total return including dividends.","category":"Finance & Investing"},{"name":"Stoichiometry Calculator","path":"/stoichiometry-calculator/","description":"Calculate reactant and product quantities from balanced equation ratios.","category":"Chemistry"},{"name":"Stone to Pounds Converter","path":"/stone-pounds-converter/","description":"Stone to pounds converter: stone, pounds, kg.","category":"Converters"},{"name":"Stopping Distance Calculator","path":"/stopping-distance-calculator/","description":"Stopping distance calculator: reaction plus braking distance by speed.","category":"Vehicles"},{"name":"Stopwatch","path":"/stopwatch/","description":"Time events with lap tracking — start, stop, and record laps to hundredths of a second. Free, private, runs locally in your browser.","category":"Time & Work"},{"name":"Story Points to Hours Calculator","path":"/story-points-to-hours-calculator/","description":"Story points to hours calculator: agile estimation conversion.","category":"Time & Work"},{"name":"Stride Length Calculator","path":"/stride-length-calculator/","description":"Stride length calculator: stride from height for walking or running.","category":"Health"},{"name":"Stripe Fee Calculator","path":"/stripe-fee-calculator/","description":"Calculate estimated Stripe fees, net proceeds, or the amount to charge for a target net. Starts with an editable 2.9% + $0.30 planning preset.","category":"Everyday Calculators"},{"name":"Student Loan Payoff Calculator","path":"/student-loan-payoff/","description":"Student loan payoff calculator: estimate your payoff months and see whether your monthly payment covers student loan interest.","category":"Finance & Investing"},{"name":"Study Time Calculator","path":"/study-time-calculator/","description":"Study time calculator: hours per credit and per course versus the common 2-hours-per-credit rule.","category":"School & Education"},{"name":"Subnet Calculator","path":"/subnet-calculator/","description":"Calculate network address, broadcast, usable host range, subnet mask, and wildcard for any IPv4 address and CIDR prefix.","category":"Text & Developer Tools"},{"name":"Subscription Churn Impact Calculator","path":"/subscription-churn-impact-calculator/","description":"Model customer and recurring-revenue trajectory from constant churn, acquisition, ARPU, and horizon assumptions.","category":"Seller & Business"},{"name":"Subscription Cost Calculator","path":"/subscription-cost-calculator/","description":"Subscription cost calculator: the real annual cost of your recurring subscriptions.","category":"Finance & Investing"},{"name":"Sugar in Drinks Calculator","path":"/sugar-in-drinks-calculator/","description":"Sugar in drinks calculator: teaspoons and daily value from grams.","category":"Health"},{"name":"Sump Pump Calculator","path":"/sump-pump-calculator/","description":"Sump pump calculator: gallons per minute needed for a basement.","category":"Construction & Measurement"},{"name":"Sun & Moon Planner","path":"/sun-moon-planner/","description":"Estimate sunrise, sunset, twilight, daylight, moon phase, moonrise, and moonset for a date and coordinates.","category":"Everyday Calculators"},{"name":"Sunrise Sunset Calculator","path":"/sunrise-sunset-calculator/","description":"Sunrise sunset calculator: sunrise, sunset, and daylight hours for any city today plus the next week.","category":"Everyday Calculators"},{"name":"Sunscreen SPF Calculator","path":"/sunscreen-spf-calculator/","description":"Sunscreen SPF calculator: burn protection time and reapplication.","category":"Health"},{"name":"Surface Area Calculator","path":"/surface-area-calculator/","description":"Calculate the surface area of common 3D shapes.","category":"Everyday Calculators"},{"name":"Swim Pace Calculator","path":"/swim-pace-calculator/","description":"Swim pace calculator: minutes per 100 meters from distance and time.","category":"Sports"},{"name":"Swimming Calories Calculator","path":"/swimming-calories-calculator/","description":"Swimming calories calculator: calories burned swimming by weight and time.","category":"Health"},{"name":"T Test Calculator","path":"/t-test-calculator/","description":"T test calculator: two-sample t statistic and significance.","category":"Statistics"},{"name":"T-Bill Yield Calculator","path":"/t-bill-yield-calculator/","description":"T-Bill yield calculator: discount yield from face value, price, and days to maturity.","category":"Finance & Investing"},{"name":"Tank Volume Calculator","path":"/tank-volume-calculator/","description":"Tank volume calculator: cylindrical tank capacity.","category":"Construction & Measurement"},{"name":"Tea Steep Calculator","path":"/tea-steep-calculator/","description":"Tea steep calculator: water temperature and time by tea type.","category":"Food & Cooking"},{"name":"Telescope Magnification Calculator","path":"/telescope-magnification-calculator/","description":"Telescope magnification calculator: power from focal length and eyepiece.","category":"Astronomy"},{"name":"Temperature Converter","path":"/temperature-converter/","description":"Temperature converter: Celsius, Fahrenheit, and Kelvin.","category":"Converters"},{"name":"Tempo Change Calculator","path":"/tempo-change-calculator/","description":"Tempo change calculator: new BPM after shifting pitch by semitones.","category":"Music & Audio"},{"name":"Term Life Insurance Calculator","path":"/term-life-insurance-calculator/","description":"Term life insurance calculator: coverage need using the DIME method.","category":"Finance & Investing"},{"name":"Test Grade Calculator","path":"/grade-calculator/","description":"Convert test points into a percentage and letter grade, and see the points needed for the next grade up.","category":"School & Education"},{"name":"Text Case Converter","path":"/text-case/","description":"Change text case in one click — lower, upper, title, and sentence case. Free and private; nothing is uploaded. Paste and convert instantly.","category":"Converters"},{"name":"Thermal Equilibrium Calculator","path":"/thermal-equilibrium-calculator/","description":"Calculate the final temperature when two objects reach thermal equilibrium.","category":"Physics"},{"name":"TikTok Money Calculator","path":"/tiktok-money-calculator/","description":"Estimate TikTok earnings from views and creator fund rate.","category":"Social Media"},{"name":"Tile Calculator","path":"/tile-calculator/","description":"Estimate tiles and boxes required from surface and tile dimensions with waste.","category":"Construction & Measurement"},{"name":"Tile Count Calculator","path":"/tile-count-calculator/","description":"Tile count calculator: tiles needed for a floor or wall.","category":"Construction & Measurement"},{"name":"Time Card Calculator","path":"/time-card-calculator/","description":"Calculate work hours, lunch deductions, overtime, and estimated gross pay.","category":"Time & Work"},{"name":"Time Zone Meeting Planner","path":"/time-zone-meeting-planner/","description":"Compare a meeting time across common world time zones using browser time-zone data.","category":"Time & Work"},{"name":"Time to Decimal Calculator","path":"/time-to-decimal-calculator/","description":"Convert hours and minutes to decimal hours for payroll and timesheets ,  and decimal hours back to hours and minutes.","category":"Time & Work"},{"name":"Timelapse Calculator","path":"/timelapse-calculator/","description":"Timelapse calculator: frames and finished clip length from capture interval and duration.","category":"Photo & Video"},{"name":"Timezone Converter","path":"/timezone-converter/","description":"Convert a time between cities and time zones worldwide with automatic daylight saving adjustment. 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Temperature, feels-like, precipitation, wind, and UV from Open-Meteo. Private, no account.","category":"Everyday Calculators"},{"name":"Weight Converter","path":"/weight-converter/","description":"Weight converter: pounds, kilograms, ounces, grams, and stones.","category":"Converters"},{"name":"Weight Loss Timeline Calculator","path":"/weight-loss-timeline-calculator/","description":"Weight loss timeline calculator: how long a healthy weekly deficit will take.","category":"Health"},{"name":"Weighted Average Calculator","path":"/weighted-average-calculator/","description":"Calculate a weighted average (weighted mean). 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