Fahrenheit to Celsius
Celsius = (Fahrenheit − 32) × 5/9. Type any temperature below for an instant conversion.
Enter a temperature to convert.
The formula
°C = (°F − 32) × 5/9
Example: (77°F − 32) × 5/9 = 25°C. Quick mental shortcut: subtract 30 and halve it (77°F → ~23.5°C; rough but close for weather).
Conversion table
| °F | °C |
|---|---|
| -40°F | -40°C |
| 0°F | -17.78°C |
| 32°F | 0°C |
| 50°F | 10°C |
| 60°F | 15.56°C |
| 68°F | 20°C |
| 70°F | 21.11°C |
| 75°F | 23.89°C |
| 80°F | 26.67°C |
| 90°F | 32.22°C |
| 98.6°F | 37°C |
| 100°F | 37.78°C |
| 104°F | 40°C |
| 150°F | 65.56°C |
| 212°F | 100°C |
| 350°F | 176.67°C |
| 400°F | 204.44°C |
Reference points worth memorizing
- Water freezes: 0°C = 32°F · Water boils: 100°C = 212°F
- Body temperature: 37°C = 98.6°F · Fever: 38°C = 100.4°F
- Room temperature: 20–22°C = 68–72°F · Hot summer day: 35°C = 95°F
- The scales cross at −40: −40°C = −40°F
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Related: Celsius to Fahrenheit