Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius.
Formula: multiply the source value by -17.22222222
Quick Conversions
About this tool
This page is a dedicated fahrenheit to celsius converter. The same factor powers the generic temperature converter, so you can still switch units if you need a different pair.
How it works
Enter a value. The result updates as you type. Use swap to reverse the pair, or change either unit.
value_to = value_from Ă— (from_in_base / to_in_base)
Examples
Fahrenheit to Celsius
Set the from unit to the left default and the to unit to the right default, then type a number.
FAQ
Can I change the units?
Yes. This page starts on this pair, but the dropdowns still expose every unit in the family.
Is the factor exact?
Factors use SI definitions (and IT constants where relevant). Rounding follows the precision control.