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Temperature Converter

Convert Celsius, Fahrenheit and Kelvin degrees instantly. Free, no sign-up, immediate result.

How it works

  1. 1

    Type the temperature you want to convert.

  2. 2

    Pick the source and target scales (swap them with the button).

  3. 3

    Read the result instantly, with up to 6 decimals when needed.

How does it work?

Temperature does not convert with a plain factor: Celsius and Fahrenheit have shifted scales, so the formula combines multiplication and addition. From Celsius to Fahrenheit: (°C × 9/5) + 32.

Kelvin is the scientific scale: it starts at absolute zero (−273.15 °C) and its degrees measure the same as Celsius, only the origin changes.

Frequently asked questions

How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32. For example, 20 °C is (20 × 9/5) + 32 = 68 °F. The converter does it for you.

And Fahrenheit to Celsius?

Subtract 32 and multiply by 5/9. For example, 68 °F is (68 − 32) × 5/9 = 20 °C.

What is absolute zero?

The lowest possible temperature: −273.15 °C, equal to 0 K. You cannot go below it, so a negative Kelvin does not exist.

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