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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin.

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Frequently asked questions

How do you convert Celsius to Fahrenheit?

Multiply the Celsius temperature by 9/5 (or 1.8), then add 32. For example, 20°C × 1.8 + 32 = 68°F. Water freezes at 0°C (32°F) and boils at 100°C (212°F).

How do you convert Fahrenheit to Celsius?

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9. For example, (68°F − 32) × 5/9 = 20°C. A quick estimate: subtract 30 and halve the result.

What is Kelvin used for?

Kelvin is the SI base unit for temperature, used in science and engineering. Zero Kelvin (−273.15°C) is absolute zero, the lowest possible temperature. Kelvin uses the same scale as Celsius but starts at absolute zero.

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