DailyCalc

Kelvins to Degrees Celsius (K to °C)

°C = K × 1 − 273.15. Type any value to convert it.

1 kelvin =

-272.15 °C

degrees Celsius

Formula
°C = K − 273.15

Fix the highlighted field to update the result.

Show in all common units
1 K in other units
UnitValue
degree Celsius (°C)-272.15 °C
degree Fahrenheit (°F)-457.87 °F
kelvin (K)1 K
degree Rankine (°R)1.8 °R

How to convert kelvins to degrees Celsius

°C = K × 1 − 273.15

°C = K − 273.15 exactly (SI Brochure: t/°C = T/K − 273.15).

Examples

  • 77.34 K = -195.81 °C: Normal boiling point of nitrogen (NIST Chemistry WebBook) (NIST)
  • 0 K = -273.15 °C: Absolute zero (BIPM)
  • 300 K = 26.85 °C: A round temperature used in physics problems

Kelvin to celsius chart

Kelvins to degrees Celsius
Kelvins (K)Degrees Celsius (°C)
0 K-273.15 °C
77.34 K-195.81 °C
233.15 K-40 °C
255.37 K-17.78 °C
273.15 K0 °C
293.15 K20 °C
300 K26.85 °C
310.15 K37 °C
373.15 K100 °C

Common mistakes

  • Values below 273.15 K are below 0 °C, not "negative kelvin": 77.34 K is −195.81 °C.

Frequently asked questions

How do I convert kelvin to Celsius?

Subtract 273.15. For example, 300 K is 26.85 °C and 273.15 K is exactly 0 °C.

What is the boiling point of liquid nitrogen in Celsius?

About −195.8 °C. The NIST Chemistry WebBook lists nitrogen’s normal boiling point as 77.34 K; subtracting 273.15 gives −195.81 °C.

Is a change of 1 K the same as 1 °C?

Yes. The kelvin and the degree Celsius are the same size, so a 5 K rise is a 5 °C rise. Only absolute values need the 273.15 offset.