How to use Celsius to Kelvin
- Type a value in Celsius.
- The result in Kelvin appears instantly.
- Type in the second box to convert the other way.
How to convert Celsius to Kelvin
Use the formula K = °C + 273.15. Example: 25 °C = 298.15 K.
Common Celsius to Kelvin conversions
-10 °C = 263.15 K. 0 °C = 273.15 K. 37 °C = 310.15 K. 100 °C = 373.15 K.
Where is °C to K conversion used?
Temperature conversions matter for weather forecasts when travelling, oven settings in recipes, body temperature and fever checks, aquarium and pool care, and science or lab work.
What are Celsius?
Celsius is the metric temperature scale. Water freezes at 0 °C and boils at 100 °C at sea level. It is used in most countries.
What are Kelvin?
Kelvin is the SI temperature scale used in science. 0 K is absolute zero, and one kelvin step equals one degree Celsius.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40 | 233.15 |
| -20 | 253.15 |
| -10 | 263.15 |
| 0 | 273.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 35 | 308.15 |
| 37 | 310.15 |
| 40 | 313.15 |
| 50 | 323.15 |
| 60 | 333.15 |
| 80 | 353.15 |
| 100 | 373.15 |
Frequently asked questions
What is 25 °C in Kelvin?
25 °C = 298.15 K.
What is 0 °C in Kelvin?
0 °C = 273.15 K.
What is 100 °C in Kelvin?
100 °C = 373.15 K.
What is the formula for Celsius to Kelvin?
K = °C + 273.15.
Is the °C to K conversion exact?
Yes. Temperature formulas are exact; results are rounded only for display. Note that temperature scales have different zero points, so you cannot convert by multiplying alone.
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