Celsius to Kelvin Converter
Enter a value in degrees Celsius to convert it to Kelvin.
Reviewed by the ToolNestr Editorial Team — July 2026
How to convert degrees Celsius to Kelvin
Converting degrees Celsius to Kelvin means moving between two temperature scales using the formula K = °C + 273.15. Because temperature scales start from different zero points, the conversion involves both scaling and an offset rather than a single multiplier. Type any value above and the result updates instantly, entirely in your browser.
Scientists use Kelvin for absolute temperature, so this converts everyday Celsius into the SI base unit. Knowing how to move between degrees Celsius and Kelvin is useful whenever measurements are given in one system but you need them in the other — for shopping, travel, study, cooking, engineering or simply comparing figures from different countries.
The reference table below lists common degrees Celsius values already converted to Kelvin, so you can read off everyday amounts at a glance without typing. For the opposite direction, use the Kelvin to Celsius Converter, which reverses the calculation exactly.
The formula and a worked example
Formula
K = °C + 273.15
Worked example
To convert 10 °C: apply K = °C + 273.15 to get 283.15 K.
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| -273.15 | 0 |
| -40 | 233.15 |
| 0 | 273.15 |
| 25 | 298.15 |
| 37 | 310.15 |
| 100 | 373.15 |
| 1,000 | 1,273.15 |
Values are rounded for display; the converter above keeps full precision.
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Frequently asked questions
How do I convert degrees Celsius to Kelvin?
Use the formula K = °C + 273.15. Enter your temperature above and the converter applies it instantly.
How many Kelvin are in one degrees Celsius?
Temperature scales do not have a single ratio because they use an offset. Use the formula K = °C + 273.15 to convert any value exactly.
Is this Celsius to Kelvin converter accurate?
Yes. It uses the exact conversion formula, so results are precise. Values shown in the table are rounded for readability.
How do I convert Kelvin back to degrees Celsius?
Use our Kelvin to Celsius Converter for the reverse direction.