Degrees Celsius to Kelvins (°C to K) Converter
To convert Celsius to kelvin, use K = °C + 273.15. For example, 20 °C = 293.15 K. Also searched as centigrade to kelvin.
Quick facts
- Formula: K = °C + 273.15
- Water freezes at 273.15 K and boils at 373.15 K (at sea level).
- Normal body temperature is about 310.2 K.
- −40 is the same in Celsius and Fahrenheit.
How to convert degrees Celsius to kelvins
Temperature scales have different zero points, so you cannot just multiply: you need the offset as well as the multiplier.
Worked example: 25 °C = 298.15 K.
Source: BIPM, The International System of Units (SI Brochure, 9th edition, 2019), for the kelvin and degree Celsius.
Degrees Celsius to Kelvins conversion table
| Degrees Celsius [°C] | Kelvins [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 |
| 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 |
Degrees Celsius vs Kelvins
| Celsius | Kelvin | |
|---|---|---|
| Symbol | °C | K |
What is a Celsius?
A scale where water freezes at 0° and boils at 100° at standard atmospheric pressure. The standard temperature scale for weather, cooking, and science in most of the world.
What is a kelvin?
The SI base unit of temperature, starting at absolute zero with no negative values. Used in physics, chemistry, and engineering wherever an absolute scale is required.
Frequently asked questions
What is the formula to convert Celsius to kelvin?
K = °C + 273.15. This conversion needs an offset as well as a multiplier because the scales have different zero points.
What is 0 °C in K?
0 °C = 273.15 K.
What is 100 °C in kelvins?
100 °C = 373.15 K.
What is 37 °C in K?
37 °C = 310.15 K.
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