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Temperature Converter

Convert temperature in both directions with clearly named units.

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How Temperature Converter works

K = °C + 273.15; K = (°F + 459.67) × 5/9.

Try an example

0 °C = 32 °F = 273.15 K.

Good to know

Values use double-precision arithmetic and are rounded to 13 significant digits. Named definitions matter; choose the intended unit.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

Use temperature conversion when an offset matters: Celsius, Fahrenheit and Kelvin are not simple scale multipliers.

How to use it

  1. Enter the known temperature and choose its scale.
  2. Choose the destination scale and read the converted value.
  3. Check whether your context expects an absolute temperature or a temperature difference before using it.

Checks before you rely on the result

  • Celsius and Fahrenheit require an offset as well as a scale factor; Kelvin starts at absolute zero.
  • A converted temperature difference follows a different rule from a converted absolute reading.
  • Display precision is limited to avoid implying measurement accuracy that was not supplied.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the Temperature Converter instructions

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