Convert Kelvin to Celsius
Enter a value in Kelvin to convert it to Celsius.
Kelvin to Celsius reference
| Kelvin | Celsius |
|---|---|
| 1 K | -272.15 °C |
| 2 K | -271.15 °C |
| 5 K | -268.15 °C |
| 10 K | -263.15 °C |
| 25 K | -248.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
How temperature conversion works
Temperature scales have different zero points, so you cannot just multiply. Celsius to Fahrenheit is °F = °C × 9/5 + 32; Celsius to Kelvin is K = °C + 273.15. This tool converts your value to Celsius first, then to the target scale.
Where this conversion comes up
Weather, cooking and oven settings, thermostats, and science homework.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many Celsius are in a Kelvin?
1 Kelvin = -272.15 Celsius.
What is the formula to convert Kelvin to Celsius?
Temperature scales have different zero points, so it is not a single multiplication — see "How temperature conversion works" below.
What is 10 Kelvin in Celsius?
See the reference table below for common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.