Temperature conversion
-15 °C to K
258.15 K
-15 degrees Celsius = 258.15 kelvin. Exact factor: K = °C + 273.15.
Live converter
Edit either field — the other updates instantly. Type decimal values like 38.4.
The formula
K = °C + 273.15
Worked example: -15 + 273.15 = 258.15 K.
Values near -15 °C
| °C | K |
|---|---|
| -18 | 255.15 |
| -17 | 256.15 |
| -16 | 257.15 |
| -15this page | 258.15 |
| -14 | 259.15 |
| -13 | 260.15 |
| -12 | 261.15 |
Frequently asked
How do you convert degrees Celsius to kelvin?
Apply the formula K = °C + 273.15. Enter any value in the live converter above and the result updates as you type.
What is -15 °C in K?
-15 °C equals 258.15 K. The reference table below shows the values immediately around -15 °C.
Why does temperature conversion add 32?
The two scales have different zero points and step sizes. Water freezes at 32 °F but 0 °C, so the formula rescales by 5/9 and shifts by the 32-degree offset.