How to convert kelvin to degrees Celsius
°C = K − 273.15
Example: 25 K → -248.15 °C
Temperature scales have different zero points, so you cannot convert them with a single multiplication factor.
Kelvin to Celsius table
| Kelvin (K) | Celsius (°C) |
|---|---|
| -40 K | -313.15 °C |
| -20 K | -293.15 °C |
| -10 K | -283.15 °C |
| 0 K | -273.15 °C |
| 10 K | -263.15 °C |
| 15 K | -258.15 °C |
| 20 K | -253.15 °C |
| 25 K | -248.15 °C |
| 30 K | -243.15 °C |
| 35 K | -238.15 °C |
| 37 K | -236.15 °C |
| 40 K | -233.15 °C |
| 50 K | -223.15 °C |
| 60 K | -213.15 °C |
| 80 K | -193.15 °C |
| 100 K | -173.15 °C |
| 150 K | -123.15 °C |
| 200 K | -73.15 °C |
About these units
Kelvin (K): The kelvin (K) is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C) and uses the same step size as Celsius.
Celsius (°C): Celsius (°C) sets 0° at the freezing point and about 100° at the boiling point of water at sea level. It is used for weather in almost every country.
Frequently asked questions
How do you convert kelvin to degrees Celsius?
To convert kelvin to degrees Celsius, use °C = K − 273.15. For example, 25 K = -248.15 °C.
How do I convert K to °C?
Use the formula °C = K − 273.15. For example, 25 K gives -248.15 °C.
How do I convert degrees Celsius back to kelvin?
Use the reverse formula on our Celsius to Kelvin page, or press Swap in the converter above.
What is the Kelvin scale?
The kelvin (K) is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C) and uses the same step size as Celsius.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every temperature unit at once? Use the Temperature Converter.