How do you convert Fahrenheit to Celsius?

To convert Fahrenheit to Celsius, the correct formula involves subtracting 32 from the Fahrenheit temperature, and then multiplying the result by ( \frac{5}{9} ). This process is necessary because the Fahrenheit and Celsius scales have different zero points and scaling intervals.

Using the formula °C = (°F - 32) × ( \frac{5}{9} ) allows us to accurately translate a temperature measured in Fahrenheit into its equivalent in Celsius. The subtraction accounts for the offset of the two scales at the freezing point of water (32°F is equivalent to 0°C), while the multiplication by ( \frac{5}{9} ) adjusts for the difference in the size of the degree intervals between the two scales—since one Celsius degree is equivalent to 1.8 Fahrenheit degrees.

This method ensures a precise conversion, which is crucial in many HVAC applications where understanding temperature differences in the correct units is essential for system design and analysis.