Unit Converter
Convert between length, weight, temperature, volume, area, and speed units. Fast, no signup.
Convert between length, weight, temperature, volume, area, speed, and time units with two big bidirectional inputs per category. Last-used units per category persist in your browser so you don't have to re-pick them every visit.
When to use it
- 1Converting recipe measurements between metric and imperial.
- 2Translating spec sheet values between unit systems.
- 3Quick everyday conversions without opening a search engine.
How it works
- 1
Pick a category
Tab into length, weight, temperature, volume, area, speed, or time. The available units change per category.
- 2
Type a number
Enter a value in either input. The other side recomputes instantly. Change either dropdown to switch units.
- 3
Last-used persists
Your last-picked units per category are saved in localStorage so the tool feels personal on your second visit.
Frequently asked
Are temperatures handled correctly?
Yes. Celsius, Fahrenheit, and Kelvin are converted using the proper offsets, not naive ratios.
What precision is shown?
Up to six significant figures for most units; you can copy the full-precision value for technical use.
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