Celsius to Kelvin converter

How to convert Celsius to Kelvin

K = °C + 273.15. Going the other way: °C = K − 273.15.

Celsius (°C) puts the freezing point of water at 0 and the boiling point at 100. Kelvin (K) is the SI unit of temperature. It starts at absolute zero, so 0 K is −273.15 °C.

Common conversions

• 0 °C in Kelvin is 273.15 K.
• 25 °C in Kelvin is 298.15 K.
• 100 °C in Kelvin is 373.15 K.

°C to K conversion table

Celsius (°C)	Kelvin (K)
-273.15 °C	0 K
-40 °C	233.15 K
0 °C	273.15 K
20 °C	293.15 K
25 °C	298.15 K
37 °C	310.15 K
100 °C	373.15 K

Questions and answers

What is the freezing point of water in Kelvin?

Water freezes at 0 °C, which is 273.15 K.

What is the boiling point of water in Kelvin?

At sea level, water boils at 100 °C, which is 373.15 K. To convert the other way, use the Kelvin to Celsius converter.

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