Celsius to Kelvin converter

K = °C + 273.15. 0 °C = 273.15 K and 25 °C = 298.15 K. Absolute zero is −273.15 °C = 0 K.

Formula: K = °C + 273.15

Conversion table

Common °C to K conversions:

0 °C	273.15 K
5 °C	278.15 K
10 °C	283.15 K
15 °C	288.15 K
20 °C	293.15 K
25 °C	298.15 K
30 °C	303.15 K
35 °C	308.15 K
37 °C	310.15 K
40 °C	313.15 K
45 °C	318.15 K
50 °C	323.15 K
60 °C	333.15 K
75 °C	348.15 K
90 °C	363.15 K
100 °C	373.15 K

Reverse: K to °C

0 K	-273.15 °C
5 K	-268.15 °C
10 K	-263.15 °C
15 K	-258.15 °C
20 K	-253.15 °C
25 K	-248.15 °C
30 K	-243.15 °C
35 K	-238.15 °C
37 K	-236.15 °C
40 K	-233.15 °C
45 K	-228.15 °C
50 K	-223.15 °C
60 K	-213.15 °C
75 K	-198.15 °C
90 K	-183.15 °C
100 K	-173.15 °C

Key facts

Formula	K = °C + 273.15
0 °C	273.15 K
25 °C	298.15 K
−273.15 °C	0 K (absolute zero)

Frequently asked questions

How do I convert Celsius to Kelvin?

Add 273.15 to the Celsius value. For example, 20 °C + 273.15 = 293.15 K.

What is 0 K in Celsius?

0 K is absolute zero, which equals −273.15 °C.

Celsius to Kelvin is part of OmniConvert on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.

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