Unit Converters

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.

Convert between milligrams, grams, kilograms, tons, ounces, pounds, and stone.

Convert between Celsius, Fahrenheit, and Kelvin instantly and accurately.

Convert between world currencies using live, daily-updated exchange rates.

Convert between square meters, hectares, acres, square feet, and more.

Convert between milliliters, liters, cubic meters, cups, pints, quarts, and gallons.

Convert between km/h, mph, m/s, knots, and feet per second.

Convert between pascals, bar, atmospheres, PSI, and mmHg.

Convert between watts, kilowatts, horsepower, and BTU per hour.

Convert between joules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU.

Convert between newton-meters, pound-feet, pound-inches, and kilogram-force meters.

Convert between bytes, KB, MB, GB, TB and their binary KiB/MiB/GiB equivalents.

Convert between Mbps, Gbps, MB/s and other bandwidth units.

Convert between milliseconds, seconds, minutes, hours, days, weeks and years.

Convert between hertz, kilohertz, megahertz, gigahertz and RPM.

Convert between degrees, radians, gradians, arcminutes, arcseconds and turns.

Convert between kg/m³, g/cm³, lb/ft³ and other density units.

Convert between newtons, kilonewtons, pounds-force, kilograms-force and dynes.

Convert between m/s², ft/s², g-force and km/h per second.

Convert between MPG (US/UK), km/L and L/100km fuel efficiency units.

Convert numbers to Roman numerals and Roman numerals back to numbers.

Spell out any number in English words — for cheques, contracts and more.

Convert a decimal number to its simplest fraction, including repeating decimals.

Convert a fraction or mixed number to its decimal value.

Convert between standard numbers and scientific (E) notation.

Convert shoe sizes between US, UK, EU and centimeters.

Convert between lux, foot-candles, phot and other illuminance units.

Convert volumetric flow between L/min, m³/h, GPM, CFM and more.

Convert dynamic viscosity between Pa·s, poise and centipoise.

Convert between px, pt, em, rem, pica, inches and mm for CSS and print.

Convert between volts, millivolts, microvolts, kilovolts and megavolts.

Convert between amperes, milliamperes, microamperes and kiloamperes.

Convert between ohms, milliohms, kilohms and megohms.

Convert between farads, microfarads, nanofarads and picofarads.

Convert between henries, millihenries and microhenries.

Convert magnetic flux density between tesla, millitesla, microtesla and gauss.

Convert radiation dose between sievert, millisievert, microsievert and rem.

Convert cooking measurements: cups, tablespoons, teaspoons, ml, sticks of butter.

Convert radioactivity between becquerel, curie and their multiples.

Convert angular velocity between rad/s, deg/s, RPM and RPS.

Convert mass flow between kg/s, kg/h, g/s, lb/s and tons/hour.

Convert luminance between cd/m² (nits), stilb, lambert and foot-lambert.

Convert thermal conductivity between W/(m·K), BTU/(h·ft·°F) and more.

Convert specific heat capacity between J/(kg·K), cal/(g·°C) and BTU units.

Convert surface tension between N/m, mN/m, dyn/cm and lbf/ft.

Convert molar concentration between mol/L, mmol/L, µmol/L and mol/m³.