How do you convert Fahrenheit to Celsius?
Use °C = (°F − 32) × 5/9.
Detailed answer
Subtract 32 first to remove the Fahrenheit offset, then multiply by 5/9. Example: 32 °F → 0 °C; 212 °F → 100 °C.
Relationship context
This is the inverse of the Celsius-to-Fahrenheit rule. Rounding 5/9 ≈ 0.555… is fine for mental math; use exact fractions for precision.
Quick conversion table
| Fahrenheit (f) | Celsius (c) |
|---|---|
| -40 | -40 |
| 0 | -17.7777777778 |
| 32 | 0 |
| 68 | 20 |
| Fahrenheit (f) | Celsius (c) |
|---|---|
| 86 | 30 |
| 100 | 37.7777777778 |
| 212 | 100 |
More Fahrenheit converters
Dedicated pages from Fahrenheit to the other scales (Celsius, Fahrenheit, Kelvin, Rankine).