Converting between units of measurement is something almost everyone needs at some point — following a recipe written in cups when you think in millilitres, reading a distance in miles, checking a weather report in Fahrenheit, or sizing a file in megabytes. Doing the arithmetic by hand is slow and easy to get wrong. Our free Unit Converter turns any value between metric and imperial units instantly, across eight common categories, right in your browser.
How to use the unit converter
- Pick a category such as length, mass, temperature or data size.
- Type the value you want to convert and choose the source unit.
- Choose the target unit — the converted result appears instantly, and you can swap the two units with one click.
Why use this converter
- Eight categories with both metric and imperial units in one place.
- Exact conversion factors and correct temperature formulas.
- Completely client-side: fast, private and free, with no ads getting in the way.