Convert Celsius to Kelvin
°C to K · temperature conversion
What are celsius and kelvin?
Celsius sets water’s freezing point at 0° and boiling at 100° at sea level, and is used by most of the world. Kelvin is the SI base unit of temperature, starting at absolute zero (−273.15 °C) with no negative values. For reference: a comfortable room is about 21 °C (70 °F), and normal body temperature is 37 °C (98.6 °F).
How to convert celsius to kelvin
Temperature scales don't share a zero point, so you can't convert by a single multiplier — use the formula K = °C + 273.15. For example, 0°C = 273.15K, 37°C = 310.15K, and 100°C = 373.15K.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 0 | 273.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 37 | 310.15 |
| 100 | 373.15 |
FAQ
What is the formula to convert celsius to kelvin?
K = °C + 273.15. Temperature scales don't share a zero point, so you convert with this formula rather than a single multiplier.
What is 0 °C in K?
0 °C = 273.15 K, and 100 °C = 373.15 K.
Why can't I just multiply celsius by a number?
Because Celsius and Kelvin start counting from different zero points, multiplication alone would give the wrong answer — you also have to shift the scale, which the formula above handles.