Convert between degrees Celsius (°C), degrees Fahrenheit (°F), and kelvin (K). Unlike linear units, temperature scales have different zero points, so conversions require offset formulas, not simple multiplication. Kelvin (K) is the SI base unit; 0 K is absolute zero (−273.15 °C).
This temperature converter transforms values from Fahrenheit (°F) to Celsius (°C). Temperature scales have different zero points, so conversion uses an offset formula, not a simple multiplier.
Degrees Fahrenheit (°F) is used primarily in the United States; 32 °F is the freezing point of water and 212 °F is its boiling point.
Degrees Celsius (°C) is a metric temperature scale where 0 °C is the freezing point of water and 100 °C is its boiling point at standard pressure.
°C = (°F − 32) × 5/9
°C = (°F − 32) × 5/9
The conversion formula transforms °F to °C. Values are first converted to kelvin (K), the SI base unit, then to the target scale, which avoids rounding errors from chained offset formulas. A change of 1 °C equals a change of 1 K, but 0 °C ≠ 0 K.
-12.222222 °C = (10 °F − 32) × 5/9 = -12.222222 °C
Common values from °F to °C.
| °F | °C |
|---|---|
| -10 | -23.3333 |
| -9 | -22.7778 |
| -8 | -22.2222 |
| -7 | -21.6667 |
| -6 | -21.1111 |
| -5 | -20.5556 |
| -4 | -20 |
| -3 | -19.4444 |
| -2 | -18.8889 |
| -1 | -18.3333 |
| 0 | -17.7778 |
| 1 | -17.2222 |
| 2 | -16.6667 |
| 3 | -16.1111 |
| 4 | -15.5556 |
| 5 | -15 |
| 6 | -14.4444 |
| 7 | -13.8889 |
| 8 | -13.3333 |
| 9 | -12.7778 |
| 10 | -12.2222 |
| 11 | -11.6667 |
| 12 | -11.1111 |
| 13 | -10.5556 |
| 14 | -10 |
| 15 | -9.4444 |
| 16 | -8.8889 |
| 17 | -8.3333 |
| 18 | -7.7778 |
| 19 | -7.2222 |
| 20 | -6.6667 |