Converters
Converters Calculators
Convert files, measurements, formats, and everyday units in the browser.
52 tools
ASCII Converter
ASCII converter: characters to ASCII codes and back.
Angle Converter
Angle converter: degrees, radians, and gradians.
Area Converter
Area converter: square feet, acres, hectares, and square meters.
Belt Size Calculator
Belt size calculator: belt length from waist size.
Children Size Converter
Children size converter: US to EU kids clothing sizes.
Crochet Hook Converter
Crochet hook converter: US letters to millimeters.
DPI Calculator
DPI calculator: pixels per inch from pixel dimensions and print size.
Data Storage Converter
Data storage converter: bytes, KB, MB, GB, TB (binary 1024 base).
Distance Between ZIP Codes Calculator
Distance between ZIP codes calculator: straight-line miles.
Dress Size Converter
Dress size converter: US to EU and UK dress sizes.
Energy Converter
Energy converter: joules, kilowatt-hours, calories, BTUs.
Glove Size Calculator
Glove size calculator: S/M/L/XL from hand circumference.
Hat Size Calculator
Hat size calculator: US hat size from head circumference.
Hectare to Acre Converter
Hectare to acre converter: hectares, acres, square meters.
Horsepower to kW Converter
Horsepower to kW converter: hp and kilowatts.
Inches to CM Converter
Inches to centimeters converter: inches to cm, mm, meters, and feet.
Jean Size Calculator
Jean size calculator: US to EU jean size conversion.
Knitting Needle Converter
Knitting needle converter: US, mm and UK needle sizes.
Length Converter
Length converter: miles, kilometers, meters, feet, inches, yards.
Metric Prefix Converter
Metric prefix converter: kilo, mega, giga, tera and friends.
Octal Converter
Octal converter: decimal, binary, octal and hex.
Pressure Converter
Pressure converter: psi, bar, kPa, atm.
Ring Size Calculator
Ring size calculator: US ring size from finger circumference.
Scale Converter
Scale converter: real-world size from map or blueprint scale.
Screen Size Calculator
Screen size calculator: width and height from diagonal and aspect.
Shoe Size Conversion
Shoe size conversion: US men's and women's to UK, EU, and centimeters (approximate).
Speed Converter
Speed converter: mph, km/h, m/s, ft/s, and knots.
Stone to Pounds Converter
Stone to pounds converter: stone, pounds, kg.
Temperature Converter
Temperature converter: Celsius, Fahrenheit, and Kelvin.
Title Case Converter
Title case converter: convert any text to title case with proper small-word handling.
Torque Converter
Torque converter: newton-meters, foot-pounds, inch-pounds.
US to EU Size Converter
US to EU size converter: general clothing conversion.
Volume Converter
Volume converter: gallons, liters, quarts, cups, fluid ounces, milliliters.
Weight Converter
Weight converter: pounds, kilograms, ounces, grams, and stones.
Yard to Feet Converter
Yard to feet converter: yards, feet, inches.
Yarn Weight Converter
Yarn weight converter: US names to wraps per inch and needle size.
ZIP Code County Lookup
ZIP code county lookup: county, FIPS code, and population for any US ZIP.
ZIP Code Lookup
ZIP code lookup: city, county and state for any US ZIP, or ZIPs for a city.
ZIP Code Timezone Calculator
ZIP Code timezone calculator: find the timezone and current local time for any US ZIP.
Baking Conversions
Convert cooking and baking measurements between cups, tablespoons, teaspoons, grams, ounces, milliliters, and liters, with ingredient densities.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals (1–4999) in either direction with validation.
Scientific Notation Converter
Convert any number to and from scientific and engineering notation with significant-figure control.
Ancient Unit Converter
Convert classical ancient units: cubit, palm, digit, stadium, talent, and more. See modern equivalents for historical measures. Private, no account.
Base64 Encoder Decoder
Encode and decode Base64 text, with local previews for PNG, JPEG, GIF, and WebP image data.
CSV to JSON Converter
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.
Hex to Decimal Converter
Convert hexadecimal and decimal values with an interactive positional-value explanation.
Image Resizer
Resize images without uploading to a server.
Liters to Ounces Converter
Convert liters to US or imperial fluid ounces with common-value reference tables.
PDF to JPG Converter
Convert PDF pages to images directly in your browser.
Sitemap Validator
Validate XML sitemap and robots basics.
Text Case Converter
Change text case in one click — lower, upper, title, and sentence case. Free and private; nothing is uploaded. Paste and convert instantly.
Unit Converter
Convert common units instantly across length, area, weight, temperature, volume, speed, and pressure.