°C to K — convert degrees Celsius to kelvin
Exact 1 + 273.15 = 274.15
1 degree Celsius in other units
| Degrees Fahrenheit | 33.8 | °F |
|---|---|---|
| Kelvin | 274.15 | K |
| Degrees Rankine | 493.47 | °R |
°C to K at a glance
| Degrees Celsius | Kelvin |
|---|---|
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 3 °C | 276.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 250 °C | 523.15 K |
| 500 °C | 773.15 K |
| 1,000 °C | 1,273.15 K |
How to convert degrees Celsius to kelvin
Multiply by 274.15 — one degree Celsius is 274.15 kelvin. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 1 + 273.15 = 274.15
In words: about two hundred seventy-four kelvin.
What these units are
The degree Celsius and the kelvin are covered in the temperature unit guide, along with every other unit on this page.
Questions
How many kelvin are in a degree Celsius?
One degree Celsius is 274.15 kelvin. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 1 degree Celsius in kelvin?
1 degree Celsius is 274.15 kelvin. The working is 1 + 273.15 = 274.15.
Why can't I just multiply to convert Celsius to Fahrenheit?
Because the two scales do not start in the same place. Zero Celsius is 32 Fahrenheit, so you have to shift as well as scale: multiply by 9/5, then add 32. Multiplying alone is right only for a temperature difference, never a temperature.
Where do the two scales meet?
At −40. Minus forty Celsius and minus forty Fahrenheit are the same temperature, which is the one value you can quote in either scale without converting.
Is it 'degrees Kelvin'?
No. Kelvin is written without the degree sign and without the word degree — 300 K, read as three hundred kelvin. It is an absolute scale, so there is no offset to name.
What is Rankine for?
Rankine is Fahrenheit's absolute scale: same size step, but starting at absolute zero instead of the Fahrenheit zero. It still turns up in US thermodynamics and aerospace work.