Convert anything instantly

A fast, universal unit & measurement converter. Pick a category, type a value, and watch it convert live — all in your browser.

How to convert units

Convert length, weight, temperature, volume and other measurements instantly — free and right in your browser.

Choose the category you need, such as length, weight or temperature.
Pick the unit you are converting from and the unit you want the result in.
Type the value — the converted measurement updates as you type.
Copy the result and use it wherever you need it.

Frequently asked questions

Which measurements can I convert?

This online unit converter handles length, weight, temperature, volume, area, speed, digital storage and time — the everyday measurement conversions you need most.

Is the unit converter free to use?

Yes. It is completely free with no sign-up and no limits on how many conversions you make.

Does it work offline?

The conversions run entirely in your browser, so once the page has loaded it keeps working without sending anything to a server.

Is any of my data uploaded?

No. Nothing is uploaded or tracked — the numbers you enter never leave your device.