How to convert Fahrenheit to Celsius
To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9: °C = (°F − 32) × 5/9.
Examples
- 20 °F = -6.666667 °C
- 100 °F = 37.777778 °C
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 | -40 |
| -20 | -28.888889 |
| 0 | -17.777778 |
| 10 | -12.222222 |
| 20 | -6.666667 |
| 30 | -1.111111 |
| 37 | 2.777778 |
| 50 | 10 |
| 68 | 20 |
| 98.6 | 37 |
| 100 | 37.777778 |
| 212 | 100 |
Frequently asked questions
- How do I convert Celsius back to Fahrenheit?
- Use the Celsius to Fahrenheit converter, or just swap the units on the full unit converter — it shows every unit in the category at once.
- Are these conversion factors exact?
- Yes. The English units have been defined in metric terms since 1959, so the factors used here are exact by definition, not rounded approximations. Displayed results are rounded only for readability.
- Can I convert other units too?
- The unit converter also handles length, weight, volume, temperature, area, speed, pressure, energy, power, torque, and fuel economy — each with every unit shown side by side.