Celsius to Kelvin Converter
1 degree Celsius = 274.15 kelvins
Type a value in either box: the conversion between degrees Celsius (°C) and kelvins (K) updates instantly.
Good to know
Absolute zero, 0 K, is −273.15 °C. Scientists use kelvins because the scale never goes below zero.
How to convert degrees Celsius to kelvins
Temperature scales have different zero points, so you cannot simply multiply. Use this formula:
K = °C + 273.15
Worked examples
- -273.15 °C = 0 K
- 0 °C = 273.15 K
- 25 °C = 298.15 K
- 100 °C = 373.15 K
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -273.15 °C | 0 K |
| -200 °C | 73.15 K |
| -100 °C | 173.15 K |
| -50 °C | 223.15 K |
| -20 °C | 253.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 37 °C | 310.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 200 °C | 473.15 K |
| 500 °C | 773.15 K |
| 1,000 °C | 1,273.15 K |
About the units
Celsius (°C)
The Celsius scale puts the freezing point of water at 0 °C and its boiling point at 100 °C at standard atmospheric pressure. It is used in almost every country.
Kelvin (K)
The kelvin (K) is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C), uses steps the same size as Celsius degrees and is written without a degree sign.
Frequently asked questions
How do I convert degrees Celsius to kelvins?
K = °C + 273.15What is 0 °C in kelvins?
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.