Unit converter
Convert between metric and imperial units.
1 in = 2.54 cm
Everything runs in your browser. Nothing is uploaded.
How it works
Pick a category
Pick a category — length, mass, temperature, volume, area, speed, time, or data size.
Set the units
Choose source and target units. Type a value — the conversion updates instantly.
Swap & repeat
Swap source and target with one tap. All conversions are local, never sent anywhere.
Questions
What does this tool do?
The Unit Converter handles conversions across eight categories — length, mass, temperature, volume, area, speed, time, and digital data size — between metric and imperial units. Pick a category, choose your source and target units, and type a value; the result updates instantly, and a single tap swaps the two units around. Conversions use SI base units and exact published factors (for example, 1 inch = 0.0254 m), with per-unit handling for the temperature offsets between Celsius, Fahrenheit, and Kelvin.
Are the conversion factors accurate?
We use SI base units for each category and exact published conversion factors (e.g. 1 inch = 0.0254 m exactly). For temperature, the offset between Celsius, Fahrenheit, and Kelvin is handled per-unit.
US or UK gallons?
US customary by default for cups, pints, and gallons. UK Imperial pints and gallons are listed separately so you can pick what you need.
KB vs. KiB?
Both decimal (KB = 1000 bytes) and binary (KiB = 1024 bytes) prefixes are available. Storage marketers tend to use decimal; operating systems often report binary.
Does it work offline?
Yes. The page works offline once it has loaded — the converter is shipped with the JavaScript bundle.