Kelvin to Degrees Celsius
Type a value in Kelvin and get the result in Degrees Celsius, calculated exactly.
20 Kelvin = −253.15 Degrees Celsius
Precision
Exact factorThis result is exact.
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Range 0 – 50 K = -273.15 – -223.15 °C
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Formula
°C = K × 1 + −273.15
To convert Kelvin to Degrees Celsius, multiply the value by 1, then add −273.15.
Worked examples
- 0 K = −273.15 °C
- 20 K = −253.15 °C
- 100 K = −173.15 °C
This factor is exact by definition.
Conversion table
| Kelvin (K) | Degrees Celsius (°C) |
|---|---|
| −40 | — |
| −30 | — |
| −20 | — |
| −10 | — |
| 0 | −273.15 |
| 5 | −268.15 |
| 10 | −263.15 |
| 15 | −258.15 |
| 20 | −253.15 |
| 25 | −248.15 |
| 30 | −243.15 |
| 35 | −238.15 |
| 37 | −236.15 |
| 40 | −233.15 |
| 50 | −223.15 |
| 60 | −213.15 |
| 70 | −203.15 |
| 80 | −193.15 |
| 90 | −183.15 |
| 100 | −173.15 |
| 150 | −123.15 |
| 200 | −73.15 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Degrees Celsius to Kelvin
| Degrees Celsius (°C) | Kelvin (K) |
|---|---|
| −40 | 233.15 |
| −30 | 243.15 |
| −20 | 253.15 |
| −10 | 263.15 |
| 0 | 273.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
| 35 | 308.15 |
| 37 | 310.15 |
| 40 | 313.15 |
| 50 | 323.15 |
| 60 | 333.15 |
| 70 | 343.15 |
| 80 | 353.15 |
| 90 | 363.15 |
| 100 | 373.15 |
| 150 | 423.15 |
| 200 | 473.15 |
Unit definitions
- Kelvin K
- The SI base unit of temperature, starting at absolute zero.
- Degrees Celsius °C
- The kelvin scale shifted by exactly 273.15: 0 °C is 273.15 K.
Questions people ask
Kelvin to Degrees Celsius: what is the conversion factor?
One K is −272.15 °C.
How do I convert Kelvin to Degrees Celsius?
Use the formula above. For example, 20 K = −253.15 °C.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.