Celsius to Kelvin — °C to K Converter

[ °C / K — Temperature ] instant · works offline

[ Value (°C) ]

Celsius · °C

[ Result (K) ] 274.15

Kelvin · K

[ From unit ]

[ To unit ]

1 °C = 274.15 K

Celsius → Kelvin

⇄ Reverse: Kelvin → Celsius

Formula

K = °C + 273.15

Use the formula K = °C + 273.15. For example, 30 °C = 303.15 K.

Quick Reference — Celsius to Kelvin

Celsius

Kelvin

-40 °C

233.15 K

-20 °C

253.15 K

-10 °C

263.15 K

0 °C

273.15 K

10 °C

283.15 K

15 °C

288.15 K

20 °C

293.15 K

25 °C

298.15 K

30 °C

303.15 K

37 °C

310.15 K

40 °C

313.15 K

100 °C

373.15 K

180 °C

453.15 K

200 °C

473.15 K

About Temperature Units

Celsius is used for weather and cooking almost everywhere except the United States, which uses Fahrenheit. Kelvin is the scientific absolute scale: 0 K is absolute zero (−273.15 °C). Handy reference points: water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, and −40 is the same in both Celsius and Fahrenheit.

Related Conversions

K → °C °C → °F °F → K All temperature units

All Temperature Conversions

→Celsius to fahrenheit →Fahrenheit to celsius →Fahrenheit to kelvin →Kelvin to celsius →Kelvin to fahrenheit

FAQ — Celsius to Kelvin

How do I convert celsius to kelvin?

Use the formula K = °C + 273.15. For example, 30 °C = 303.15 K.

What is 1 °C in Kelvin?

1 degree Celsius = 274.15 K.

At what temperature are Celsius and Fahrenheit equal?

At −40: −40 °C is exactly −40 °F.

Does this converter work offline?

Yes. Once the page has loaded, conversions run entirely in your browser and nothing is sent to a server.