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Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Reaumur.

5 units
6 decimals

1 °C = 33.8 °F

About the temperature converter

Convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Reaumur. Unlike most converters, temperature scales have different zero points, so each conversion uses an offset in addition to a multiplier. Kelvin is the SI base unit, defined relative to absolute zero (−273.15 °C).

Common conversions

Celsius to Fahrenheit Fahrenheit to Celsius

Frequently asked questions

  • How do you convert Celsius to Fahrenheit?

    Multiply by 9/5 and add 32. So 100 °C = 212 °F.

  • How do you convert Fahrenheit to Celsius?

    Subtract 32 and multiply by 5/9. So 32 °F = 0 °C.

  • What is 0 K in Celsius?

    0 K equals −273.15 °C — absolute zero, the lowest theoretically attainable temperature.

  • Why does temperature use offsets and not just a multiplier?

    Each scale has a different zero point. Pure linear scaling would not align freezing and boiling points correctly between systems, so an additive offset is required.

More common converters

Length → Weight and Mass → Volume → Area → Pressure → Energy → Speed → Time →

Complete list of temperature units