Kelvin to Celsius ConverterRight in Your Browser
Convert kelvins (K) to degrees Celsius (°C). The kelvin (K) is the SI temperature unit used in science — it starts at absolute zero, so nothing can be colder than 0 K. Celsius (°C) is the temperature scale used almost everywhere outside the US — 0° is freezing and 100° is boiling water. Everything is calculated locally in your browser — no server, and it works offline.
-272.15 °C
in degrees Celsius (Celsius)
To convert kelvins to degrees Celsius, subtract 273.15 from the Kelvin value.
Switch to Celsius to KelvinKelvin to Celsius Chart
| Kelvins (K) | Degrees Celsius (°C) |
|---|---|
| -40 | -313.15 |
| 0 | -273.15 |
| 10 | -263.15 |
| 20 | -253.15 |
| 25 | -248.15 |
| 30 | -243.15 |
| 37 | -236.15 |
| 40 | -233.15 |
| 100 | -173.15 |
Frequently Asked Questions
What is 273.15 K in degrees Celsius?
273.15 K — the freezing point of water — is 0 °C. Type any temperature into the converter above for an instant result.
What is the formula to convert kelvins to degrees Celsius?
To convert kelvins to degrees Celsius, subtract 273.15 from the Kelvin value. For example, 10 K is -263.15 °C.
What is 300 kelvins in degrees Celsius?
300 kelvins — a warm room in a physics problem — is 26.85 degrees Celsius. The converter above works for any value, entirely in your browser.
Is the Kelvin to Celsius formula exact?
Yes — the Kelvin and Celsius scales are defined exactly in terms of each other, so "subtract 273.15 from the Kelvin value" gives an exact result. Values on this page are rounded to six significant digits for readability.