Free Unit Converter
Convert length, weight, temperature, area, volume, speed and data units instantly with this free unit converter. Pick a category, enter a value, and get an accurate result right away, with nothing uploaded anywhere.
Data units use binary 1024-based values and are labelled KiB, MiB, GiB and TiB. Temperature uses proper offset formulas for Celsius, Fahrenheit and Kelvin.
How to use this unit converter
- Choose a category such as Length, Weight or Temperature.
- Pick the unit you are converting from and the unit you want.
- Type a value. The result updates live as you type.
- Use Swap to reverse the conversion direction.
How do I convert units with this tool?
Choose a category such as length or weight, pick the unit you are converting from and the unit you want, then type a value. The result updates instantly as you type, so you do not need to press a button. Use Swap to reverse the direction and compare the result in both directions quickly.
Is the temperature conversion accurate?
Yes. Temperature uses the correct offset formulas, not simple multiplication. Celsius, Fahrenheit and Kelvin are converted through a common base, so freezing, boiling and everyday temperatures convert correctly. Other categories use fixed conversion factors, and data units use binary 1024-based values labelled KiB, MiB and GiB.
Does this unit converter work offline and keep my data private?
Yes. All conversions run in your browser, so no values are uploaded to a server or stored anywhere. Once the page has loaded, you can use it without sending data elsewhere. That makes it a practical choice for quick classroom, workshop and everyday calculations on any device.