Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly. Free temperature converter shows all three scales at once with precise results.
About this tool
The world cannot agree on how to measure temperature. Most countries use Celsius, the United States uses Fahrenheit, and scientists use Kelvin. A weather report, an oven setting or a lab instruction in the wrong scale can be confusing or even dangerous if misread.
Our free temperature converter translates between all three scales instantly. Enter a temperature in any scale and the tool shows the matching value in Celsius, Fahrenheit and Kelvin side by side, so you always have the full picture.
How to use
Enter the temperature number, choose which scale it is in, and press Convert. The tool immediately displays the value in all three scales. You do not need to run three separate conversions.
If you enter a temperature below absolute zero, the coldest anything can physically be, the tool will tell you the value is impossible instead of showing nonsense.
The math behind it
Celsius is the pivot scale. Fahrenheit converts with the formula C = (F - 32) x 5/9, and Kelvin with C = K - 273.15. Going the other way: F = C x 9/5 + 32 and K = C + 273.15. The key reference points are handy to remember: water freezes at 0 C (32 F, 273.15 K) and boils at 100 C (212 F, 373.15 K).