Celsius to Kelvin ConverterRight in Your Browser
Convert degrees Celsius (°C) to kelvins (K). Celsius (°C) is the temperature scale used almost everywhere outside the US — 0° is freezing and 100° is boiling water. The kelvin (K) is the SI temperature unit used in science — it starts at absolute zero, so nothing can be colder than 0 K. Everything is calculated locally in your browser — no server, and it works offline.
274.15 K
in kelvins (Kelvin)
To convert degrees Celsius to kelvins, add 273.15 to the Celsius value.
Switch to Kelvin to CelsiusCelsius to Kelvin Chart
| Degrees Celsius (°C) | Kelvins (K) |
|---|---|
| -40 | 233.15 |
| 0 | 273.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 37 | 310.15 |
| 40 | 313.15 |
| 100 | 373.15 |
Frequently Asked Questions
What is 0 °C in kelvins?
0 °C — the freezing point of water — is 273.15 K. Type any temperature into the converter above for an instant result.
What is the formula to convert degrees Celsius to kelvins?
To convert degrees Celsius to kelvins, add 273.15 to the Celsius value. For example, 10 °C is 283.15 K.
What is 37 degrees Celsius in kelvins?
37 degrees Celsius — normal human body temperature — is 310.15 kelvins. The converter above works for any value, entirely in your browser.
Is the Celsius to Kelvin formula exact?
Yes — the Celsius and Kelvin scales are defined exactly in terms of each other, so "add 273.15 to the Celsius value" gives an exact result. Values on this page are rounded to six significant digits for readability.