What is the formula to convert Fahrenheit to Celsius?

The correct function for converting Fahrenheit to Celsius involves rearranging the relationship between the two temperature scales. The accurate formula is:

Degree C = (F - 32) x 5/9.

This formula allows you to determine Celsius temperature based on a known Fahrenheit temperature by first subtracting 32 from the Fahrenheit value and then multiplying the result by 5/9.

The option identified in the question—it states the relationship between Celsius and Fahrenheit correctly as relating Celsius availability to Fahrenheit, but it incorrectly suggests that one can convert Celsius to Fahrenheit using the same formula. In reality, the conversion from Fahrenheit to Celsius is achieved through the mentioned formula, not the one provided in that option.

Understanding this conversion is essential in respiratory care because clinicians often need to interpret body temperatures or environmental conditions reported in either Fahrenheit or Celsius. Accurate conversions ensure proper assessment and treatment decisions based on temperature readings.