Unit Converter

Convert length, mass, temperature and more between units.

The Unit Converter converts values across 12 categories including length, mass, temperature, area, volume, speed, time, angle, pressure, energy, power and frequency. It supports precise decimal control and swapping the source and target units.

How to use

Choose a category such as length, mass or temperature.
Enter a value and pick the source and target units.
Adjust precision, swap units if needed, and copy the result.

Frequently asked questions

How are temperature conversions handled?

Temperature units use their own affine formulas so Celsius, Fahrenheit and Kelvin convert correctly.

Are conversions performed locally?

Yes. All conversion tables and calculations run directly in your browser.

How many decimal places can I keep?

Precision can be set from 0 to 12 decimal places.

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