Converter
Degrees Celsius to Kelvin
1 °C is 274.15 K. Type any amount below and the answer follows as you type, on your device.
The answer follows what you type, rounded to six significant figures. Nothing is sent anywhere.
The formula
K = °C × 1 + 273.15
Multiply the degree Celsius figure by 1, then add 273.15.
The added number is there because the two scales do not start at the same place. That is why this conversion cannot be done with a single multiplication.
Worked example
How many kelvin are in 10 degrees Celsius?
10 °C → 283.15 K
Multiply 10 by 1, then add 273.15. The answer is 283.15 K.
Quick reference
The common values, rounded to six significant figures.
| degrees Celsius (°C) | kelvin (K) |
|---|---|
| 0 | 273.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 37 | 310.15 |
| 100 | 373.15 |
When you need this
Physics and chemistry formulas in the senior years use kelvin, and any calculation involving the gas laws or thermal energy needs this shift before the numbers behave.
The factor above is the exact legal definition of each unit, not a rounded one, so the answers stay right at any size. Nothing here is sent to a server: the conversion runs in the page.