Convert Fahrenheit to Celsius
Instant temperature conversion, with the formula and a full reference table.
1 °F
-17.2222 °C
1 °C = 33.8 °F
How to convert Fahrenheit to Celsius
Temperature scales do not share a zero point, so the conversion needs an offset as well as a multiplier — you cannot simply scale the number.
°°C = (°°F × 0.55555556 − 17.7778 − 0) ÷ 1
Worked example
To convert 25 °F: apply the formula above to get -3.8889 °C.
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 1 | -17.2222 |
| 2 | -16.6667 |
| 3 | -16.1111 |
| 5 | -15 |
| 10 | -12.2222 |
| 20 | -6.6667 |
| 25 | -3.8889 |
| 50 | 10 |
| 100 | 37.7778 |
| 250 | 121.11 |
| 500 | 260 |
| 1,000 | 537.78 |