Kelvin to Celsius Converter – °C = K − 273.15
Convert kelvin to Celsius with a single offset
Direction locked to K → °C
Formula & steps
°C = K − 273.15
°C = K − 273.15 °C = 298.15 − 273.15 °C = 25
Common values
Engineering examples
These values are common engineering examples (datasheet corners, room temperature, and high-temperature ratings). They are not a universal operating-temperature rating for every electronic component.
Natural-language input accepted: 25C, -40 F, 300K.
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Quick Answer
°C = K − 273.15. 0 K = −273.15°C, 273.15 K = 0°C, 298.15 K = 25°C. The degree size does not change.
Kelvin to Celsius Converter
°C = K − 273.15
This is a shift of the zero point only. 1 K of change is 1°C of change.
Formula and steps
- Start from the kelvin reading. It cannot be below 0 K.
- Subtract 273.15.
- The result is Celsius.
Example: 298.15 K → 298.15 − 273.15 = 25°C.
Kelvin to Celsius chart
| K | °C |
|---|---|
| 0 | −273.15 |
| 233.15 | −40 |
| 255.37 | −17.78 |
| 273.15 | 0 |
| 293.15 | 20 |
| 298.15 | 25 |
| 373.15 | 100 |
| 398.15 | 125 |
Write kelvin as K, not °K.
Related
- Reverse: Celsius to Kelvin
- Temperature Difference Calculator if you need ΔT, not an absolute reading
- Temperature Converter
Design Notes
Electronics datasheets use Celsius exclusively. Standard operating ranges: commercial (0-70°C), industrial (-40 to 85°C), automotive (-40 to 125°C). Junction temperature is the most critical thermal parameter for IC reliability. Common corner values such as -55°C or 125°C are examples, not a universal rating for every part.
Common Mistakes
- 1
Forgetting the offset in Celsius-Fahrenheit conversion — it is NOT a simple multiplication.
- 2
Using ° symbol with Kelvin — correct notation is simply K, not °K.
- 3
Confusing temperature difference with absolute temperature — a 10°C rise = 18°F rise, but 10°C = 50°F.
Engineering Handbox
°C = K − 273.15 °C = 300 − 273.15 = 26.85
Knowledge Base
How do I convert Kelvin to Celsius?
Subtract 273.15. Do not multiply by 9/5 — that factor is only for Fahrenheit.
Can Kelvin be negative?
Not on this converter. 0 K is absolute zero.