Instant unit conversions for length, weight, temperature, volume and more. Complete conversion tables. No signup.
This unit converter runs entirely in your browser — no data is ever sent to a server. As a measurement converter, it covers every common unit from metric to imperial: inches to cm, kg to lbs, miles to km, Fahrenheit to Celsius, and much more. The instant conversion table below the main converter answers every variant of your unit conversions question on a single page.
Enter your value in the input field, select the unit you are converting from in the dropdown, then select the unit you want to convert to. The result appears instantly. You can also see all unit conversions at once in the table below the main converter.
Yes, completely free. No account, no signup, no file size limits, no watermarks. The tool is ad-supported to remain free for everyone.
No. unitconversions.app is a fully client-side tool. All unit conversions happen entirely in your browser using pure JavaScript math — no data is ever sent to a server. You can disconnect from the internet after the page loads and the tool will still work.
All conversions use internationally accepted conversion factors. For example, 1 inch = exactly 2.54 cm, 1 pound = exactly 0.45359237 kg. Results are displayed to up to 6 significant figures, which is more than sufficient for everyday use.
unitconversions.app supports 14 categories: Length, Weight/Mass, Temperature, Volume, Area, Speed, Time, Digital Storage, Pressure, Energy, Frequency, Angle, Fuel Economy, and Cooking. Each category page includes a full conversion table showing all units at once.