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Celsius to Kelvin Converter

K = °C × 1 + 273.15. Type any value to convert Celsius to Kelvin.

1 °C = 274.15 K

Formula: K = °C × 1 + 273.15

Common values
Decimals
In every unit 5 units
Degree Celsius (°C) 1 °C
Degree Fahrenheit (°F) 33.8 °F
Kelvin (K) 274.15 K
Degree Rankine (°R) 493.47 °R
Degree Réaumur (°Ré) 0.8 °Ré

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If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Celsius to Kelvin table

Formula: K = °C × 1 + 273.15

Degree Celsius (°C)Kelvin (K)
-40 °C233.15 K
-30 °C243.15 K
-20 °C253.15 K
-10 °C263.15 K
-5 °C268.15 K
0 °C273.15 K
5 °C278.15 K
10 °C283.15 K
15 °C288.15 K
20 °C293.15 K
25 °C298.15 K
30 °C303.15 K
35 °C308.15 K
36.6 °C309.75 K
37 °C310.15 K
38 °C311.15 K
40 °C313.15 K
50 °C323.15 K
60 °C333.15 K
70 °C343.15 K
80 °C353.15 K
90 °C363.15 K
100 °C373.15 K
150 °C423.15 K
180 °C453.15 K
200 °C473.15 K
250 °C523.15 K

How to use: Celsius to Kelvin

  1. 1 Type the value in Celsius.
  2. 2 The result in Kelvin appears at once – or type in the Kelvin field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of temperature.

About this tool

Degree Celsius (°C) is a temperature scale (SI). Kelvin (K) is a temperature scale (SI).

To convert Celsius to Kelvin, multiply by 1, then add 273.15 (K = °C × 1 + 273.15). Example: 0 °C = 273.15 K.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert Celsius to Kelvin?

To convert Celsius to Kelvin, multiply by 1, then add 273.15: K = °C × 1 + 273.15. For example 0 °C = 273.15 K.

What is 1 °C in Kelvin?

1 °C = 274.15 K. The other way round, 1 K = -272.15 °C.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of temperature here?

Yes – choose any of the 5 units of temperature in the From and To lists, or switch to another measurement at the top.

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