A temperature is a numerical measure of hot and cold. Its measurement is by detection of heat radiation, particle velocity, kinetic energy, or most commonly, by the bulk behavior of a thermometric material. It may be calibrated in any of various temperature scales, Celsius, Fahrenheit, Kelvin, etc.
| from Fahrenheit | to Fahrenheit | |
|---|---|---|
| Celsius | [°C] = ([°F] - 32) × 5/9 | [°F] = [°C] × 9/5 + 32 |
| Kelvin | [K] = ([°F] + 459.67) × 5/9 | [°F] = [K] × 9/5 - 459.67 |
| Rankine | [°R] = [°F] + 459.67 | [°F] = [°R] - 459.67 |
| For temperature intervals rather than specific temperatures, 1°F = 1°R = 5/9°C = 5/9 K Comparisons among various temperature scales |
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