🔁 Unit Converters — Length, Mass, Temperature, Pressure, Energy & More

Convert any value into every unit of the same quantity at once. Factors follow SI definitions and NIST SP 811 exact values where available.

Length ConverterConvert length units instantly: metre, kilometre, centimetre, millimetre, micrometre, nanometre and more. Precise factors, all units shown at once.
Area ConverterConvert area units instantly: square metre, square kilometre, square centimetre, square millimetre, hectare, are and more. Precise factors, all units shown at once.
Volume ConverterConvert volume units instantly: litre, cubic metre, millilitre, cubic centimetre, decilitre, centilitre and more. Precise factors, all units shown at once.
Mass & Weight ConverterConvert mass units instantly: kilogram, gram, milligram, microgram, tonne, pound and more. Precise factors, all units shown at once.
Temperature ConverterConvert temperature units instantly: Celsius, Fahrenheit, kelvin, Rankine, Réaumur and more. Precise factors, all units shown at once.
Time ConverterConvert time units instantly: second, millisecond, microsecond, nanosecond, minute, hour and more. Precise factors, all units shown at once.
Speed ConverterConvert speed units instantly: metre per second, kilometre per hour, mile per hour, knot, foot per second, Mach (sea level, 15 °C) and more. Precise factors, all units shown at once.
Acceleration ConverterConvert acceleration units instantly: metre per second squared, standard gravity, foot per second squared, gal (cm/s²), km/h per second and more. Precise factors, all units shown at once.
Pressure ConverterConvert pressure units instantly: pascal, hectopascal, kilopascal, megapascal, bar, millibar and more. Precise factors, all units shown at once.
Energy ConverterConvert energy units instantly: joule, kilojoule, megajoule, calorie (thermochemical), kilocalorie (food Calorie), watt-hour and more. Precise factors, all units shown at once.
Power ConverterConvert power units instantly: watt, kilowatt, megawatt, milliwatt, horsepower (mechanical), metric horsepower and more. Precise factors, all units shown at once.
Force ConverterConvert force units instantly: newton, kilonewton, dyne, kilogram-force, gram-force, pound-force and more. Precise factors, all units shown at once.
Torque ConverterConvert torque units instantly: newton-metre, kilonewton-metre, kilogram-force metre, pound-force foot, pound-force inch, ounce-force inch and more. Precise factors, all units shown at once.
Angle ConverterConvert angle units instantly: degree, radian, gradian, arcminute, arcsecond, milliradian and more. Precise factors, all units shown at once.
Frequency ConverterConvert frequency units instantly: hertz, kilohertz, megahertz, gigahertz, terahertz, revolutions per minute and more. Precise factors, all units shown at once.
Data Storage ConverterConvert data units instantly: byte, bit, kilobyte, megabyte, gigabyte, terabyte and more. Precise factors, all units shown at once.
Data Transfer Rate ConverterConvert data rate units instantly: megabit per second, bit per second, kilobit per second, gigabit per second, byte per second, kilobyte per second and more. Precise factors, all units shown at once.
Density ConverterConvert density units instantly: kilogram per cubic metre, gram per cubic centimetre, gram per millilitre, gram per litre, kilogram per litre, pound per cubic foot and more. Precise factors, all units shown at once.
Fuel Economy ConverterConvert fuel economy units instantly: litres per 100 km, kilometres per litre, miles per US gallon, miles per imperial gallon, miles per litre and more. Precise factors, all units shown at once.
Electric Charge ConverterConvert charge units instantly: coulomb, millicoulomb, microcoulomb, nanocoulomb, ampere-hour, milliampere-hour and more. Precise factors, all units shown at once.
Electric Current ConverterConvert current units instantly: ampere, milliampere, microampere, nanoampere, kiloampere, abampere and more. Precise factors, all units shown at once.
Voltage ConverterConvert voltage units instantly: volt, millivolt, microvolt, kilovolt, megavolt and more. Precise factors, all units shown at once.
Electrical Resistance ConverterConvert resistance units instantly: ohm, milliohm, kiloohm, megaohm, gigaohm, siemens (conductance) and more. Precise factors, all units shown at once.
Capacitance ConverterConvert capacitance units instantly: farad, millifarad, microfarad, nanofarad, picofarad and more. Precise factors, all units shown at once.
Inductance ConverterConvert inductance units instantly: henry, millihenry, microhenry, nanohenry and more. Precise factors, all units shown at once.
Magnetic Flux Density ConverterConvert magnetic flux density units instantly: tesla, millitesla, microtesla, nanotesla, gauss, milligauss and more. Precise factors, all units shown at once.
Radioactivity ConverterConvert radioactivity units instantly: becquerel, kilobecquerel, megabecquerel, gigabecquerel, curie, millicurie and more. Precise factors, all units shown at once.
Radiation Dose ConverterConvert radiation dose units instantly: sievert (equivalent dose), millisievert, microsievert, rem, millirem, gray (absorbed dose, wR = 1) and more. Precise factors, all units shown at once.
Illuminance ConverterConvert illuminance units instantly: lux, kilolux, foot-candle, phot, nox and more. Precise factors, all units shown at once.
Dynamic Viscosity ConverterConvert dynamic viscosity units instantly: pascal-second, millipascal-second, poise, centipoise, pound per foot-second and more. Precise factors, all units shown at once.
Volumetric Flow Rate ConverterConvert flow rate units instantly: cubic metre per second, cubic metre per hour, litre per second, litre per minute, litre per hour, US gallon per minute and more. Precise factors, all units shown at once.
Solution Concentration ConverterConvert concentration units instantly: molar (M), millimolar (mM), micromolar (µM), nanomolar (nM), picomolar (pM), mole per cubic metre and more. Precise factors, all units shown at once.
MetricConvert SI prefixes units instantly: base unit, quetta (10³⁰), ronna (10²⁷), yotta (10²⁴), zetta (10²¹), exa (10¹⁸) and more. Precise factors, all units shown at once.
Cooking Measurement ConverterConvert cooking volume units instantly: millilitre, litre, US cup, metric cup, US tablespoon, US teaspoon and more. Precise factors, all units shown at once.