Kelvin to Celsius converter

How to convert kelvin to degrees Celsius

To convert kelvin to degrees Celsius, use °C = K − 273.15. For example, 300 K is 26.85 °C. Type any value in the converter above and the result updates instantly.

The Kelvin to Celsius formula

The conversion is °C = K − 273.15. One kelvin equals -272.15 °C. The temperature formulas are exact; only the digits shown are rounded.

Kelvin to Celsius conversion table

Where kelvin and degrees Celsius are used

Kelvin is the scientific temperature scale, starting at absolute zero, used in physics, chemistry and astronomy.

Celsius is the everyday temperature scale in almost every country: weather, cooking, health and science.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 100 K = -173.15 °C
• 273.15 K = 0 °C
• 373.15 K = 100 °C

Converting kelvin to degrees Celsius in your head

As a quick estimate, multiply by -272 (rounded).

Celsius to Kelvin reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Temperature scales have different zero points, so you cannot simply multiply: you must add or subtract an offset as well.
• A difference of 1 °C equals a difference of 1.8 °F, but 0 °C is 32 °F, not 0 °F.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the Celsius to Kelvin converter.