Formula
The kelvin and Celsius degree are the same size. Only the zero differs:
K = °C + 273.15
Science formulas that ask for kelvin can start from this result.
Assumptions
- The scale follows the ITS-90 offset: 0 °C is 273.15 K.
- A Fahrenheit degree is 5/9 of a Celsius degree.
- The result is shown with up to two decimal places.
Worked example
0 °C equals 273.15 K.
Input definitions
- Celsius
- The reading you want on the absolute scale.
Limitations
Kelvin is not written with a degree sign. The page does not convert Fahrenheit directly.
Questions
Why 273.15?
Absolute zero is −273.15 °C, so that many kelvin separate the two zeros.
Can kelvin be negative?
No. The lowest Celsius value accepted here is −273.15, which is 0 K.