Free Online Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin with a single input. See the conversion formulas and common reference points.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin

Source Unit

Temperature in Celsius

°C

Celsiussource

0.00 °C

Fahrenheit

32.00 °F

Kelvin

273.15 K

Enter a temperature value.

Select the source unit (Celsius, Fahrenheit, or Kelvin).

See the converted values in all other units instantly.

How do you convert Celsius to Fahrenheit?

°F = (°C × 9/5) + 32. For example, 100°C = 212°F.

How do you convert Fahrenheit to Celsius?

°C = (°F - 32) × 5/9. For example, 72°F ≈ 22.2°C.

What is Kelvin used for?

Kelvin is the SI unit for temperature, used primarily in science. 0 K is absolute zero (-273.15°C).