Fahrenheit to Celsius conversion formula is Celsius = (Fahrenheit - 32) / 1.8.
To convert Fahrenheit to Celsius, fist subtract 32 (freezing point of °F - freezing point of °C; that is 32 - 0 = 32), then divide the result by 1.8 because it is the ratio between °F and °C.
For example: To convert from 77 °F to °C, subtract 32 from Fahrenheit first and then divide by 1.8 ratio, that is: (77 °F - 32) / 1.8 = 25 °C .
The 1.8 °F and °C ratio is calculated as (boiling point for Fahrenheit, 212°F - freezing point for Fahrenheit, 32°F) / (boiling point for Celsius, 100°C - freezing point for Celsius, 0°C), that is 180 / 100 = 1.8 ratio between Fahrenheit and Celsius.
Fahrenheit is a temperature scale with the freezing point of water is 32 degrees and the boiling point of water is 212 degrees under standard atmospheric pressure (101.325 kPa). The absolute zero temperature is -459.67 °F. The symbol for Fahrenheit is "°F".
Celsius (centigrade) is a temperature scale with the freezing point of water is 0 degree and the boiling point of water is 100 degrees under standard atmospheric pressure (101.325 kPa). The absolute zero temperature is -273.15 °C. The symbol for Celsius is "°C".
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