What is the correct formula for converting Fahrenheit to Celsius?

The correct formula for converting Fahrenheit to Celsius is derived from the relationship between these two temperature scales. In order to convert a temperature in Fahrenheit (F) to Celsius (C), you need to first subtract 32 from the Fahrenheit temperature, since the freezing point of water in Fahrenheit is 32 degrees, which does not correspond to 0 degrees Celsius.

After this subtraction, you then divide the result by 1.8, which accounts for the different degree scales; Celsius degrees are larger than Fahrenheit degrees, so the division helps to normalize the value. This formula accurately converts the temperature to the Celsius scale, reflecting the correct relationship between the two measurements.

The other formulas do not provide the correct relationship needed for conversion; for instance, adding 32 or manipulating 1.8 incorrectly leads to inaccurate temperature readings. Understanding the correct method of conversion is crucial in fields such as aviation maintenance, where precise temperature readings are vital for equipment calibration and safety.