Unit Converter
Convert common physical and technical measurements in one place. Choose from length, mass, temperature, volume, area, speed, pressure, energy, power, storage, time, fuel economy, torque, force, frequency, angle, flow, density, acceleration and electrical unit families.
Conversions use exact defined factors where standards provide them and conventional reference factors otherwise. Round the result to the precision appropriate for your application.
How this tool works
Most unit families use a base-unit factor: value in the source unit × source factor ÷ target factor. Temperature and fuel economy require offset or reciprocal formulas rather than a simple scale factor.
Example
1 mile converts to 1.609344 kilometers, while 1 pound converts to exactly 0.45359237 kilograms under the defined international pound.
Common questions
Which measurement types are included?
The converter includes common SI, U.S. customary, Imperial, digital-storage and electrical unit families, with specialized handling for temperature and fuel economy.
Are the conversions exact?
Defined relationships such as inches to meters are exact. Some conventional engineering or reference-unit relationships are displayed to practical precision.