Convert Fahrenheit to Celsius
Subtract 32 from Fahrenheit and multiply by 5/9.
Formula: °C = (°F − 32) × 5/9
Choose the source and target units carefully because the conversion factor depends on the direction of the conversion. A reverse conversion should return the original quantity, apart from rounding.
Verify the result by reversing the conversion with the reciprocal factor; the original value should be recovered apart from rounding.