Degrees Celsius to Kelvin
Type a value in Degrees Celsius and get the result in Kelvin, calculated exactly.
20 Degrees Celsius = 293.15 Kelvin
Precision
Exact factorThis result is exact.
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Turn either dial: drag it, use the arrow keys, or scroll while it has focus. Both cover the same range.
Range -25 – 50 °C = 248.15 – 323.15 K
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Formula
K = °C × 1 + 273.15
To convert Degrees Celsius to Kelvin, multiply the value by 1, then add 273.15.
Worked examples
- 0 °C = 273.15 K
- 20 °C = 293.15 K
- 100 °C = 373.15 K
This factor is exact by definition.
Conversion table
| 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 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Kelvin to Degrees Celsius
| 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 |
Unit definitions
- Degrees Celsius °C
- The kelvin scale shifted by exactly 273.15: 0 °C is 273.15 K.
- Kelvin K
- The SI base unit of temperature, starting at absolute zero.
Questions people ask
Degrees Celsius to Kelvin: what is the conversion factor?
One °C is 274.15 K.
How do I convert Degrees Celsius to Kelvin?
Use the formula above. For example, 20 °C = 293.15 K.
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.