Celsius to Kelvin Converter
Convert degrees Celsius (°C) to kelvins (K) as you type — K = °C + 273.15. Switch units, change the precision or copy the result.
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How to use this tool
Steps for using the Unit Converter.
- Enter a value in From — degrees Celsius are already selected.
- The result in kelvins appears instantly. Change either unit to convert to anything else in temperature.
- Use the swap button for the reverse conversion, and set the decimal places you need.
- Turn on Show formula to see the calculation, then copy or share the result.
Example
25 °C to K
25 °CK = 25 + 273.15 = 298.15 KCommon use cases
- Weather forecasts and thermostat settings in °C and °F.
- Oven temperatures in recipes (180 °C ≈ 356 °F).
- Science, engineering and colour temperatures in kelvin.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -40 °C | 233.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| Celsius (°C) | Kelvin (K) |
|---|---|
| 30 °C | 303.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
Values rounded to 6 decimal places.
Related conversions
The units
- Celsius (°C)
- K − 273.15. Part of the Metric system.
- Kelvin (K)
- SI base unit; 0 K is absolute zero. Part of the SI system.
How to convert degrees Celsius to kelvins
Science and engineering use kelvin, the SI unit; a change of 1 °C equals a change of 1 K.
To convert degrees Celsius to kelvins, use K = °C + 273.15. Temperature scales have different zero points, so the conversion adds an offset as well as scaling — multiplying alone gives the wrong answer.
Celsius (°C): K − 273.15. Kelvin (K): SI base unit; 0 K is absolute zero.
For the opposite direction, use the Kelvin to Celsius converter. All temperature units are on the temperature converter.
Limitations
- Results are rounded to the decimal places you choose; the calculation itself keeps full precision.
Frequently asked questions
How do I convert degrees Celsius to kelvins?
Use K = °C + 273.15. For example, 25 °C = 298.15 K and 37 °C = 310.15 K.
At what temperature are Celsius and Fahrenheit equal?
At −40: −40 °C = −40 °F.
What is normal body temperature in Fahrenheit?
37 °C = 98.6 °F.