How does unit conversion work?
Most categories convert the source value to a common base unit, then convert that base value to the target unit. Exact definitions include 1 in = 0.0254 m and 1 lb = 0.45359237 kg.
Nonlinear categories such as temperature and fuel economy use dedicated formulas.
Decimal and binary data units
1 GB = 1,000,000,000 bytes; 1 GiB = 1,073,741,824 bytes. This distinction can explain differences between storage capacity labels and operating-system displays.
Included categories
Length, mass, temperature, area, volume, speed, pressure, energy, power, digital data, time, angle, force and fuel-economy conversions are available in one interface.
Frequently asked questions
How many centimeters are in 1 inch?
By the international exact definition, 1 inch = 2.54 centimeters.
How many kilometers are in 1 mile?
1 statute mile is exactly 1.609344 kilometers.
Are GB and GiB the same?
No. GB uses decimal base 1,000 while GiB uses binary base 1,024.
Are US and Imperial gallons the same?
No. Everyday volume units such as gallon and cup in this tool are explicitly labeled US; an Imperial gallon is not included as the same unit.