EngiRef / Temperature conversion
Convert Degrees Celsius to Kelvin (°C to K)
K = °C × 1 + 273.15. Convert degrees Celsius to Kelvin with the exact formula, a common-values table and a free converter.
Conversion formula
K = °C × 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: °C 0 is 273.15 K, and doubling the input does not double the result. Apply the multiplier, then the offset, in that order.
°C to K table
| Degrees Celsius (°C) | Kelvin (K) |
|---|---|
| 0 °C | 273.15 K |
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
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 °C in K?
1 °C is 274.15 K. Because temperature scales are offset rather than proportional, this figure is not a multiplier: 100 °C is 373.15 K, not 100 times 274.15.
What is the formula to convert degrees Celsius to Kelvin?
K = °C × 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 Kelvin back to degrees Celsius?
Use the inverse formula, °C = K × 1 - 273.15. The K to °C page carries the same table in that direction.