Kelvin to Celsius

1 K = -272.15 °C

Kelvin to Celsius turns a scientific absolute temperature into a number most people can picture. It is common when reading research papers, space and astronomy data, or calculation results, and when reporting results back in everyday units.

From

When you need to convert kelvins to degrees Celsius

Making sense of planetary or spacecraft temperatures quoted in kelvins
Reporting the result of a thermodynamics calculation in familiar units
Reading superconductivity or cryogenics specifications
Interpreting data from scientific instruments and climate models

How to convert kelvins to degrees Celsius

°C = K × 1 − 273.15

Example: 25 K = -248.15 °C

Common kelvin values

Kelvin (K)	Celsius (°C)
0 K	-273.15 °C
77 K	-196.15 °C
195 K	-78.15 °C
233 K	-40.15 °C
273.15 K	0 °C
293 K	19.85 °C
298 K	24.85 °C
310 K	36.85 °C
373.15 K	100 °C
1,000 K	726.85 °C

Tips for converting kelvins to degrees Celsius

Subtract exactly 273.15. Many textbooks round to 273, which is fine for rough work but not for precise lab results.
Kelvin has no negative values, since 0 K is absolute zero. A negative kelvin figure is a sign of a typo or a mix-up.
Color temperatures on light bulbs (such as 2700 K) are a description of light color, not the bulb temperature.

Kelvin to Celsius conversion table

Kelvin (K)	Celsius (°C)
-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
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
100 K	-173.15 °C
150 K	-123.15 °C
200 K	-73.15 °C
300 K	26.85 °C

About the units

Kelvin: The kelvin is the SI base unit of thermodynamic temperature. 0 K is absolute zero, and a change of 1 K equals a change of 1 °C.

Celsius: The degree Celsius is the temperature scale used in most of the world. Water freezes at 0 °C and boils at 100 °C at sea level.

Frequently asked questions

What is 1 kelvin in degrees Celsius?

1 kelvin equals -272.15 degrees Celsius.

What is 1 degree Celsius in kelvins?

1 degree Celsius equals 274.15 kelvins.

How do I convert kelvins to degrees Celsius?

Use the formula °C = K × 1 − 273.15.

What is 10 kelvins in degrees Celsius?

10 kelvins equals -263.15 degrees Celsius.

Related conversions

Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated October 17, 2026