Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin. Edit any one of the three boxes and the others recalculate instantly — nothing leaves your browser.
Type a value in any field to convert it.
Summary
0 °C = 32 °F = 273.15 K
How to use the Temperature Converter
Type a temperature into the Celsius, Fahrenheit or Kelvin field.
The other two boxes (and the summary line) update live as you type.
Use Copy all values to keep the full set of readings.
Frequently asked questions
What is the formula from Celsius to Fahrenheit?
Fahrenheit = Celsius × 9/5 + 32. So 0 °C is 32 °F, 100 °C is 212 °F and −40 °C equals −40 °F.
How do I convert to Kelvin?
Kelvin = Celsius + 273.15. For example 0 °C is 273.15 K and 100 °C is 373.15 K.
Can temperature go below absolute zero?
No — 0 K (−273.15 °C) is the coldest possible temperature. The tool warns you if you enter a value colder than that.