About converting Fahrenheit to Celsius
Fahrenheit and Celsius use different reference points and interval sizes, so their relationship is calculated with the temperature-scale formula shown above. Degrees Celsius use the freezing and boiling behavior of water as familiar reference points and are standard in most countries. This conversion involves units that are temperature scales with different reference points and interval sizes. Unlike a simple length conversion, changing between these scales requires an offset as well as a scale adjustment. Degrees Fahrenheit are widely used for weather forecasts, cooking, and household temperatures in the United States.
Fahrenheit and Celsius conversion
Temperature scales use different zero points and intervals, so the calculator applies the appropriate temperature formula rather than a single multiplication factor.
Worked Fahrenheit to Celsius examples
These examples use the appropriate temperature-scale relationship: 0 °F = -17.7777777778 °C; 20 °F = -6.6666666667 °C; 100 °F = 37.7777777778 °C.