Convert Kelvin to Celsius

Enter a value in kelvin to convert it to celsius. The result updates instantly and includes the formula and calculation steps.

Kelvin to Celsius calculator

to
K
Celsius
°C

Kelvin to Celsius formula

Use this formula to convert kelvin to celsius:

Celsius = Kelvin - 273.15

Calculation

Enter a valid number above to see the formula with your value substituted step by step.

Kelvin to Celsius Conversion Table

Reference values for converting Kelvin to Celsius.

Kelvin (K)Celsius (°C)
0 K-273.15 °C
1 K-272.15 °C
2 K-271.15 °C
5 K-268.15 °C
10 K-263.15 °C
20 K-253.15 °C
50 K-223.15 °C
100 K-173.15 °C

Worked example

Convert 320 Kelvin to Celsius

Celsius = 320 - 273.15 = 46.85 Celsius

About these units

Kelvin

The Kelvin scale is an absolute temperature scale named after the Scottish physicist William Thomson, 1st Baron Kelvin. It is commonly used in scientific and engineering applications where an absolute temperature reference is required. The Kelvin scale starts at absolute zero, the point at which all molecular motion ceases. The freezing point of water on the Kelvin scale is 273.15 K, and the boiling point is 373.15 K.

Celsius

Celsius is a unit of temperature measurement that is part of the metric system. It is named after the Swedish astronomer Anders Celsius, who developed the scale. The Celsius scale sets the freezing point of water at 0 degrees and the boiling point at 100 degrees under standard atmospheric pressure. It is widely used in scientific and everyday contexts around the world.

Frequently asked questions

Is 0 Kelvin equal to -273.15 degrees Celsius?
Yes, 0\,K is equivalent to -273.15\,°C, which is absolute zero.
What is the difference between Kelvin and Celsius scales?
Both scales have the same unit size, but Kelvin starts at absolute zero (0\,K), whereas Celsius starts at the freezing point of water (0\,°C).
Why do we subtract 273.15 to convert Kelvin to Celsius?
Subtracting 273.15 adjusts for the difference in starting points between the Kelvin and Celsius scales.