Kelvin
Practical uses

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Celsius
[°C] = [K] − 273.15
[K] = [°C] + 273.15
Fahrenheit
[°F] = [K] × ​9⁄5 − 459.67
[K] = ([°F] + 459.67) × ​5⁄9
Rankine
[°R] = [K] × ​9⁄5
[K] = [°R] × ​5⁄9
For temperature intervals rather than specific temperatures, 1 K = 1 °C = ​9⁄5 °F = ​9⁄5 °R Comparisons among various temperature scales
For temperature intervals rather than specific temperatures, 1 K = 1 °C = ​9⁄5 °F = ​9⁄5 °R Comparisons among various temperature scales
For temperature intervals rather than specific temperatures, 1 K = 1 °C = ​9⁄5 °F = ​9⁄5 °R Comparisons among various temperature scales

Question: What is the Celsius equivalent of absolute zero and how is it calculated?
Answer: The [°C] = [K] − 273.15 ([°F] = [K] × ​9⁄5 − 459.67) definition implies that absolute zero (0 K) is equivalent to −273.15 °C (−459.67 °F).