Temperature conversion
-45 °C to K
228.15 K
-45 degrees Celsius = 228.15 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: -45 + 273.15 = 228.15 K.
Values near -45 °C
| °C | K |
|---|---|
| -48 | 225.15 |
| -47 | 226.15 |
| -46 | 227.15 |
| -45this page | 228.15 |
| -44 | 229.15 |
| -43 | 230.15 |
| -42 | 231.15 |
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 -45 °C in K?
-45 °C equals 228.15 K. The reference table below shows the values immediately around -45 °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.