Subtract 32 before multiplying
For an absolute Fahrenheit temperature, subtract 32 first and then multiply by 5/9.
Unit converter
Fahrenheit to Celsius Converter
Convert degrees Fahrenheit to degrees Celsius instantly. Fahrenheit to Celsius for weather and ovens. See the formula, worked examples and practical reference…
How to convert °F to °C
Fahrenheit to Celsius is frequently used for weather forecasts, ovens and temperature guidance intended for metric audiences.
Formula: °C = (°F − 32) × 5 ÷ 9
Reverse formula: °F = (°C × 9 ÷ 5) + 32
Worked example
1 °F = -17.222222 °C
- = 255.927778 K
Avoid these errors
Common mistakes
Temperature differences do not use the offset
A change of 18°F equals a change of 10°C; the 32-degree offset applies to absolute readings, not differences.
Useful for: Weather, cooking and temperature readings in Celsius.
Common °F to °C conversions
| degrees Fahrenheit | degrees Celsius |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.777778 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 77 °F | 25 °C |
| 86 °F | 30 °C |
| 98.6 °F | 37 °C |
| 212 °F | 100 °C |
About the units
A degree Fahrenheit is an imperial unit represented by °F. A degree Celsius is a metric unit represented by °C. Calculations use the same authoritative registry as the full temperature converter, retaining full precision until display.
Sources and definitions
NIST — SI units and conversion guidance
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.