Celsius to Kelvin converter
Type a Celsius value and read Kelvin instantly, with the other two scales alongside. The formula is K = °C + 273.15.
- 0 °C = 273.15 K
- 20 °C = 293.15 K
- 37 °C = 310.15 K
- 100 °C = 373.15 K
How to convert Celsius to Kelvin
K = °C + 273.15
Kelvin is the SI unit of temperature, used in physics, chemistry and engineering. It starts at absolute zero, so it never goes negative, and it is written without a degree sign. Step through a worked example:
K = °C + 273.15
- …
°C to K table
| Celsius (°C) | Kelvin (K) |
|---|---|
| −40 °C | 233.15 K |
| −30 °C | 243.15 K |
| −20 °C | 253.15 K |
| −18 °C | 255.15 K |
| −10 °C | 263.15 K |
| −5 °C | 268.15 K |
| 0 °C | 273.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 20 °C | 293.15 K |
| 21 °C | 294.15 K |
| 22 °C | 295.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 35 °C | 308.15 K |
| 37 °C | 310.15 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 |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
| 220 °C | 493.15 K |
| 250 °C | 523.15 K |
Need more rows? The full temperature conversion chart goes from −50 to 300 °C.
Questions
How do you convert Celsius to Kelvin?
Use K = °C + 273.15. For example, 20 °C is 293.15 K.
What is 0 °C in Kelvin?
0 °C equals 273.15 K.
What is 100 °C in Kelvin?
100 °C equals 373.15 K.
Why use Kelvin?
Kelvin is the SI unit of temperature, used in physics, chemistry and engineering. It starts at absolute zero, so it never goes negative, and it is written without a degree sign.
Why is Kelvin written without a degree sign?
Since 1967 the SI unit has been "the kelvin" (K), a unit like the metre, not "degrees Kelvin". A kelvin is the same size as a Celsius degree.