There are only a few calculations involved in converting degrees from Fahrenheit into Celsius. The formula to convert Fahrenheit degrees to Celsius is subtract 32 from the given Fahrenheit number, divide the result by nine then multiply that by five.Continue Reading
Subtract 32 from the Fahrenheit degrees. Using the given example, 120 minus 32 equals 88.
Continuing with the example, divide 88 by nine to get 9.777. This can be rounded out to 9.8 in order to simplify calculations.
Finally, take the quotient from the second step and multiply it by five. In this example, 9.8 multiplied by five is 49. 120 degrees Fahrenheit is equal to 49 degrees Celsius.