Temperature formulas
°F = (°C × 9/5) + 32
°C = (°F − 32) × 5/9
K = °C + 273.15
Reference points
| Description | °C | °F | K |
|---|---|---|---|
| Absolute zero | −273.15 | −459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Room temperature | 22 | 71.6 | 295.15 |
| Body temperature | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
FAQ
At what temperature are Celsius and Fahrenheit equal?
−40. Both scales intersect at −40°C = −40°F.
Why is Kelvin used in science?
Kelvin starts at absolute zero (the lowest possible temperature) and has no negative values, making it ideal for scientific calculations involving ratios and proportions of temperature.