Common unit converters
Unit conversion is the process of converting a quantity expressed in one unit to another. This is done with conversion factors—multipliers that express the relationship between the original unit and the desired unit. For example, you can use a conversion factor to convert a volume measurement in gallons to liters or vice versa.
This page contains calculators you can use to perform unit conversions for a variety of measurement types, including common conversions such as those for length, volume, temperature and pressure as well as conversions for engineering, fluid and light applications.
Distance and Length Conversion
Convert units of Length or Distance instantly. Choose from 92 different units including meter, kilometer, decimeter, centimeter, millimeter, micron, league, mile, fathom, yard, foot, inch...
Weight And Mass Conversion
Convert units of Weight or Mass instantly. Choose from 70 different units including kilogram, gram, kilopound, slug, pound, ounce, quintal, stone, tonne, pennyweight, carat, grain, talent, mina, Planck mass ...
Capacity and Volume Conversion
Convert units of Capacity and Volume instantly. Choose from 76 different units including cubic meter, cubic kilometer, cubic decimeter, cubic centimeter, cubic millimeter, liter, exaliter, petaliter, teraliter ...
Volume - Dry Conversion
Convert units of Volume - Dry instantly. Choose from 15 different units including liter, barrel dry, pint dry, quart dry, peck, bushel, cor, homer, ephah, seah, omer, cab, log ...
Area Conversion
Convert units of Area instantly. Choose from 39 different units including square meter, square kilometer, square hectometer, square dekameter, square decimeter, square centimeter, square millimeter ...
Temperature Conversion
Convert units of Temperature instantly. Choose from 6 different units including kelvin, degree Celsius, degree Fahrenheit, degree Rankine, degree Reaumur, Triple point of water.
Pressure Conversion
Convert units of Pressure instantly. Choose from 52 different units including pascal, bar, pound-force/square inch, torr, atmosphere technical, Standard atmosphere, gigapascal, megapascal, hectopascal ...
Energy and Work Conversion
Convert units of Energy and Work instantly. Choose from 54 different units including joule, gigajoule, megajoule, kilojoule, millijoule, microjoule, nanojoule, attojoule, megaelectron-volt, kiloelectron-volt ...
Power Conversion
Convert units of Power instantly. Choose from 76 different units including watt, exawatt, petawatt, terawatt, gigawatt, megawatt, kilowatt, hectowatt, dekawatt, deciwatt, centiwatt, milliwatt, microwatt ...
Force Conversion
Convert units of Force instantly. Choose from 33 different units including newton, exanewton, petanewton, teranewton, giganewton, meganewton, kilonewton, hectonewton, dekanewton, decinewton, centinewton ...
Time Conversion
Convert units of Time instantly. Choose from 33 different units including second, millisecond, microsecond, nanosecond, picosecond, femtosecond, attosecond, shake, minute, hour, day, week, month, year ...
Velocity Conversion
Convert units of Velocity instantly. Choose from 32 different units including meter/second, meter/hour, meter/minute, kilometer/hour, kilometer/minute, kilometer/second, centimeter/hour, centimeter/minute ...
Data Storage Conversion
Convert units of Length or Distance instantly. Choose from 41 different units including bit, nibble, byte, character, word, MAPM-word, quadruple-word, block, kilobit, kilobyte, megabit, megabyte, gigabit, gigabyte ...
Engineering converters
The following conversion factors address engineering measurements of acceleration, density and torque. Converting these measurements between different units may be useful in machine design or in the characterization of equipment such as stirred bioreactors.
Acceleration Conversion
Convert units of Acceleration instantly. Choose from 19 different units including decimeter/square second, meter/square second, kilometer/square second, hectometer/square second, dekameter/square second ...
Density Conversion
Convert units of Density instantly. Choose from 42 different units including kilogram/cubic meter, kilogram/cubic centimeter, gram/cubic meter, gram/cubic centimeter, gram/cubic millimeter ...
Torque Conversion
Convert units of Torque instantly. Choose from 17 different units including newton meter, newton centimeter, newton millimeter, kilonewton meter, dyne meter, dyne centimeter, dyne millimeter ...
Fluids converters
These calculators convert between measurements relevant to fluid handling, such as flow, concentration, viscosity and permeability. Whether you are performing quality control or determining the appropriate flowmeter or pump for your application, converting your measurements into the appropriate units will make your calculations easier.
Flow Conversion
Convert units of Flow instantly. Choose from 58 different units including cubic meter/second, cubic meter/day, cubic meter/hour, cubic meter/minute, cubic centimeter/day, cubic centimeter/hour ...
Flow - Mass Conversion
Convert units of Flow-Mass instantly. Choose from 31 different units including kilogram/second, gram/second, gram/minute, gram/hour, gram/day, milligram/minute, milligram/hour, milligram/day, kilogram/minute ...
Concentration - Molar Conversion
Convert units of Concentration-Molar instantly. Choose from 12 different units including mol/cubic meter, mol/liter, mol/cubic centimeter, mol/cubic millimeter, kilomol/cubic meter, kilomol/liter ...
Concentration - Solution Conversion
Convert units of Concentration-Solution instantly. Choose from 11 different units including kilogram/liter, gram/liter, milligram/liter, part/million, grain/gallon, pound/gallon, pound/million gallon, pound/cubic foot ...
Viscosity - Dynamic Conversion
Convert units of Viscosity-Dynamic instantly. Choose from 29 different units including pascal second, kilogram-force second/square meter, newton second/square meter, millinewton second/square meter ...
Viscosity - Kinematic Conversion
Convert units of Viscosity-Kinematic instantly. Choose from 24 different units including square meter/second, square meter/hour, square centimeter/second, square millimeter/second, square foot/second, square foot/hour ...
Permeability Conversion
Convert units of Permeability instantly. Choose from 4 different units including permeability, permeability inches ...
Light converters
These calculators for measurements of luminance, illumination, frequency and wavelength convert between a variety of units and can be especially useful for calculations regarding imaging or photometry.
Luminance Conversion
Convert units of Luminance instantly. Choose from 19 different units including candela/square meter, candela/square centimeter, candela/square foot, candela/square inch, kilocandela/square meter, stilb ...
Illumination Conversion
Convert units of Illumination instantly. Choose from 12 different units including lux, meter-candle, centimeter-candle, foot-candle, flame, phot, nox, candela steradian/square meter, lumen/square meter ...
Frequency Wavelength Conversion
Convert units of Frequency Wavelength instantly. Choose from 34 different units including hertz, exahertz, petahertz, terahertz, gigahertz, megahertz, kilohertz, hectohertz, dekahertz, decihertz, centihertz, millihertz ...
Miscellaneous converters
Prefixes Conversion
Convert units of Prefixes instantly. Choose from 21 different units including none, yotta, zetta, exa, peta, tera, giga, mega, kilo, hecto, deka, deci, centi, milli, micro, nano, pico, femto, atto, zepto ...
Data Transfer Conversion
Convert units of Data Transfer instantly. Choose from 107 different units including bit/second, byte/second, kilobit/second, kilobyte/second, megabit/second, megabyte/second, gigabit/second, gigabyte/second ...