EngiRef / Temperature conversion
Convert Kelvin to Degrees Celsius (K to °C)
°C = K × 1 - 273.15. Convert Kelvin to degrees Celsius with the exact formula, a common-values table and a free converter.
Conversion formula
°C = K × 1 - 273.15
Temperature scales set their zero in different places, so this is an offset conversion, not a ratio. There is no single number you can multiply by: K 0 is -273.15 °C, and doubling the input does not double the result. Apply the multiplier, then the offset, in that order.
K to °C table
| Kelvin (K) | Degrees Celsius (°C) |
|---|---|
| 0 K | -273.15 °C |
| 1 K | -272.15 °C |
| 2 K | -271.15 °C |
| 5 K | -268.15 °C |
| 10 K | -263.15 °C |
| 20 K | -253.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
Every figure is computed at build time by the site’s own converter from the temperature unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
What is 1 K in °C?
1 K is -272.15 °C. Because temperature scales are offset rather than proportional, this figure is not a multiplier: 100 K is -173.15 °C, not 100 times -272.15.
What is the formula to convert Kelvin to degrees Celsius?
°C = K × 1 - 273.15. Apply the multiplier first, then the offset. Every value in the table on this page is computed with that formula by the same converter the tool below runs.
How do I convert degrees Celsius back to Kelvin?
Use the inverse formula, K = °C × 1 + 273.15. The °C to K page carries the same table in that direction.