Updated 2026 · By ToolFern

Celsius to Kelvin Converter

Convert celsius to kelvin (°C to K) instantly. Type a value and get the answer live, or use the table below. 1 °C = 274.15 K.

°C
=
K

How to convert celsius to kelvin

To convert celsius to kelvin, use the temperature formula K = °C + 273.15. Temperature scales do not share a zero point, so you cannot just multiply, you apply the formula.Enter any value in the box above and the answer updates instantly, no sign-up and nothing leaves your browser.

Celsius to Kelvin conversion table

Celsius (°C)Kelvin (K)
1 °C274.15 K
2 °C275.15 K
3 °C276.15 K
5 °C278.15 K
10 °C283.15 K
20 °C293.15 K
25 °C298.15 K
50 °C323.15 K
100 °C373.15 K
1,000 °C1,273.15 K

Frequently asked questions

How many kelvin in a celsius?

1 °C = 274.15 K. So 1 celsius equals 274.15 kelvin.

What is the °C to K formula?

K = °C + 273.15.

Does it work in reverse?

Yes. Use the Kelvin to Celsius converter to go the other way.

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