Convert Celsius to Kelvin
Enter a temperature in Celsius to see it in Kelvin. Conversion runs in your browser.
Celsius to Kelvin formula
K = (°C+273.15)Temperature scales differ in both their zero point and their degree size, so a conversion needs a multiplication and an offset — unlike length or weight, where a single factor is enough.
Conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40°C | 233.15K |
| -20°C | 253.15K |
| 0°C | 273.15K |
| 10°C | 283.15K |
| 20°C | 293.15K |
| 25°C | 298.15K |
| 30°C | 303.15K |
| 37°C | 310.15K |
| 50°C | 323.15K |
| 75°C | 348.15K |
| 100°C | 373.15K |
| 200°C | 473.15K |
About Celsius
The Celsius scale puts the freezing point of water at 0° and its boiling point at 100° at standard pressure.
About Kelvin
The kelvin is the SI base unit of temperature, starting at absolute zero; it uses the same degree size as Celsius.
Frequently asked questions
What is 0°C in Kelvin?
0°C equals 273.15K.
What is normal body temperature?
37°C — about 310.15K.
At what temperature do the two scales meet?
Only Celsius and Fahrenheit cross, at −40°. Kelvin and Rankine both start at absolute zero and never go negative.