Convert Kelvin to Celsius

1 K = -272.15 °C. Enter any value below.

Converted to every unit

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Kelvin to Celsius formula

°C = K − 273.15

Kelvin is the SI temperature unit; 0 K is absolute zero, and a change of 1 K equals a change of 1 °C. The Celsius scale sets water's freezing point at 0 °C and boiling point at 100 °C at sea level.

Worked example

Using the formula, 25 K = -248.15 °C.

Kelvin to Celsius conversion table

KelvinCelsius
-40 K-313.15 °C
-20 K-293.15 °C
-10 K-283.15 °C
0 K-273.15 °C
10 K-263.15 °C
20 K-253.15 °C
25 K-248.15 °C
30 K-243.15 °C
32 K-241.15 °C
37 K-236.15 °C
40 K-233.15 °C
50 K-223.15 °C
60 K-213.15 °C
70 K-203.15 °C
80 K-193.15 °C
90 K-183.15 °C
98.6 K-174.55 °C
100 K-173.15 °C
150 K-123.15 °C
200 K-73.15 °C
212 K-61.15 °C
300 K26.85 °C
350 K76.85 °C
400 K126.85 °C
450 K176.85 °C
500 K226.85 °C

Frequently asked questions

What is 0 K in Celsius?

0 K equals -273.15 °C.

How do I convert kelvin to celsius?

Use the formula °C = K − 273.15. For example, 25 K = -248.15 °C.

Last reviewed: October 2026 · Uses exact, internationally defined conversion factors.