Celsius to Kelvins Converter

Enter the temperature in Celsius below to get the value converted to kelvins.


Result in Kelvins:

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20 °C = 293.15 K

Do you want to convert kelvins to Celsius?

How to Convert Celsius to Kelvins

Convert degrees Celsius to kelvins with this simple formula:

kelvins = [°C] + 273.15

The formula to convert Celsius to kelvins is °C plus 273.15. Insert the [°C] temperature measurement in the formula and then solve to find the result.

For example, let's convert 50 °C to kelvins:

50 °C = ( 50 + 273.15 ) = 323.15 K

The Celsius scale and Kelvins are both used to measure temperature. Read on to learn more about each of them.

infographic showing how to convert degrees celsius to kelvins

What Is Celsius?

The Celsius temperature scale, also commonly referred to as the centigrade scale, is defined in relation to the kelvin. Specifically, degrees Celsius is equal to kelvins minus 273.15.[1]

The degree Celsius is the SI derived unit for temperature in the metric system. A degree Celsius is sometimes also referred to as a degree centigrade. Celsius can be abbreviated as C; for example, 1 degree Celsius can be written as 1 °C.

Important Temperatures In Degrees Celsius

TemperatureDegrees Celsius
Absolute Zero-273.15 °C
Freezing Point of Water0 °C
Triple Point of Water0.01 °C
Boiling Point of Water100 °C

Learn more about Celsius.

What Is a Kelvin?

The Kelvin scale is an absolute temperature scale that uses absolute zero as the starting point. The kelvin is defined in terms of the Boltzmann constant, which is a measure of the energy of motion corresponding to one kelvin.

More specifically, one kelvin is equal to the change of thermodynamic temperature that results in a change of thermal energy kT by 1.380649 × 10−23 J.[2]

0 kelvins are equal to −273.15 degrees Celsius, which is the point of absolute zero.

The kelvin is the SI base unit for temperature in the metric system. Kelvins can be abbreviated as K; for example, 1 kelvin can be written as 1 K.

The kelvin scale is different from other temperature scales in that it is not expressed in degrees, values are expressed in kelvins. When using the Kelvin scale in writing, the "k" is capitalized, however when using the kelvin as a unit the "k" should be lower-case, even though it is named for a person.

Important Temperatures In Kelvins

Absolute Zero0 K
Freezing Point of Water273.15 K
Triple Point of Water273.16 K
Boiling Point of Water373.15 K

Learn more about kelvins.

Celsius to Kelvin Conversion Table

Celsius measurements converted to kelvins
Celsius Kelvins
-273.15 °C 0 K
-50 °C 223.15 K
-40 °C 233.15 K
-30 °C 243.15 K
-20 °C 253.15 K
-10 °C 263.15 K
0 °C 273.15 K
10 °C 283.15 K
20 °C 293.15 K
30 °C 303.15 K
40 °C 313.15 K
50 °C 323.15 K
60 °C 333.15 K
70 °C 343.15 K
80 °C 353.15 K
90 °C 363.15 K
100 °C 373.15 K
110 °C 383.15 K
120 °C 393.15 K
130 °C 403.15 K
140 °C 413.15 K
150 °C 423.15 K
160 °C 433.15 K
170 °C 443.15 K
180 °C 453.15 K
190 °C 463.15 K
200 °C 473.15 K
300 °C 573.15 K
400 °C 673.15 K
500 °C 773.15 K
600 °C 873.15 K
700 °C 973.15 K
800 °C 1,073 K
900 °C 1,173 K
1,000 °C 1,273 K


  1. National Institute of Standards and Technology, SI Units - Temperature, https://www.nist.gov/pml/owm/si-units-temperature
  2. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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