Formulas: K = °C + 273.15 · °C = K − 273.15
| °C | K |
|---|
Convert temperatures between Celsius (°C / Centigrade) and Kelvin (K) instantly. Kelvin is the SI unit for temperature, widely used in science and engineering. Use the converter above, or follow the simple formulas and examples below.
Formula: K = °C + 273.15
Examples:
0 °C → 273.15 K
25 °C → 298.15 K
100 °C → 373.15 K
Formula: °C = K − 273.15
Examples:
273.15 K → 0 °C
310 K → 36.85 °C
373.15 K → 100 °C
| °C | K |
|---|---|
| −273.15 | 0 (absolute zero) |
| −40 | 233.15 |
| 0 | 273.15 |
| 25 | 298.15 |
| 37 | 310.15 |
| 100 | 373.15 |
Kelvin is an absolute temperature scale starting at 0 K (absolute zero). It’s standard in physics, chemistry, and astronomy, and avoids negative values for thermodynamic calculations.
Formula: K = (°F − 32) × 5/9 + 273.15
Example: 32 °F → (32 − 32) × 5/9 + 273.15 = 273.15 K.
Q: Is Celsius the same as Centigrade?
Yes — “Centigrade” is the older name for the Celsius scale.
Q: What is absolute zero in Celsius?
0 K = −273.15 °C, the lowest possible temperature.
Q: What’s the difference between Kelvin and Celsius?
They have the same scale size (1 K = 1 °C). Kelvin starts at absolute zero; Celsius sets 0 °C at water’s freezing point.
Q: How do I convert Celsius to Kelvin quickly?
Add 273.15 to the Celsius value.
Q: How do I convert Kelvin to Celsius quickly?
Subtract 273.15 from the Kelvin value.