Freezing · 273.2 K
0 °C
Kelvin to Celsius Converter (Kelvins to Celsius)
°C = K − 273.15. 300 K = 26.85 °C.
Boiling · 373.2 K
100 °C
Body · 310.2 K
37 °C
Room · 293.2 K
20 °C
How to convert Kelvin to Celsius
Temperature scales have different zero points, so you can't just multiply: there's an offset too.
°C = K − 273.15
Example: 300 K = 26.85 °C. Water freezes at 273.15 K and boils at 373.15 K.
About the kelvin and the degree Celsius
Kelvin (K)
The kelvin is the SI base unit of temperature. 0 K is absolute zero; a change of 1 K equals a change of 1 °C.
Degree Celsius (°C)
The Celsius scale (also called centigrade) puts the freezing point of water at 0 °C and its boiling point at 100 °C at sea-level pressure. Formally it is defined from the kelvin: °C = K − 273.15.
1 kelvin in every temperature unit
Degrees Fahrenheit-457.87 °FDegrees Celsius-272.15 °C
Degrees Rankine1.8 °R
Degrees Réaumur-217.72 °Ré
Related conversions
Kelvin to Celsius FAQ
What is the formula for K to °C?
°C = K − 273.15.
How do I convert °C back to K?
Use the reverse formula: K = °C + 273.15. Or press the ⇄ button on the converter.
Can I print this Kelvin to Celsius chart?
Yes. Use "Print / Save PDF" next to the converter for a one-page chart, or "Download CSV" to open it in Excel or Google Sheets.