Fahrenheit to Celsius converter
Convert degrees Fahrenheit (°F) to degrees Celsius (°C). Formula: °C = (°F − 32) × 5/9.
Converter tool
Formula: °C = (°F − 32) × 5/9
Quick examples
| Fahrenheit | Celsius |
|---|---|
| -40 | -40 |
| 32 | 0 |
| 68 | 20 |
| 98.6 | 37 |
| 212 | 100 |
How to convert Fahrenheit to Celsius
Formula: °C = (°F − 32) × 5/9.
Reverse conversion: °F = °C × 9/5 + 32
Tip: Use the swap button to reverse the calculation instantly.
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Fahrenheit → Celsius FAQs
What constants are used?
We use exact constants: 273.15 and 459.67 for Kelvin relations; 9/5 and 5/9 for °C/°F.
How do I go the other way?
°F = °C × 9/5 + 32
Are the results rounded?
Calculations use exact constants; values are displayed with sensible rounding for readability.