Unit Converter

Type a value, pick the units and the result updates instantly, along with the same value in every other unit of that kind. Conversion factors use exact definitions where they exist (for example 1 inch = 2.54 cm).

Runs entirely in your browser. Your input and files are not uploaded to any server.

How to use

  1. Choose what you are converting (length, mass, temperature…).
  2. Enter the value and choose the units to convert from and to.
  3. Use the swap button to reverse, or read all units in the table.

Examples

Cooking

350 °F = 176.67 °C.

Travel

120 km/h = 74.56 mph.

Privacy

Runs entirely in your browser. Your input and files are not uploaded to any server. See the privacy policy for what is stored in your browser (favorites and history only). Privacy policy

Check it yourself: open your browser’s developer tools, select the Network tab and use the tool. Your file never appears in an upload request. Once this page is saved for offline use, you can also disconnect from the internet and keep working. Ads and anonymous visit statistics, when enabled, make their own requests, but they never receive your files or text.

Frequently asked questions

How precise are the results?

Results are shown with up to 10 significant digits. Factors follow SI and the international yard and pound definitions.

Which gallon is used?

Both are listed: US liquid gallon (3.785 L) and imperial gallon (4.546 L).

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