
A quick lesson on how to convert between temperatures in degrees Fahrenheit and degrees Celsius
Converting between units of measure or scales is a nice use of algebraic formulas. When a formula represents one quantity (such as temperature in degrees Fahrenheit) in terms of another quantity (such as temperature in degrees Celsius), it shows a functional relationship. Thinking of algebra in terms of functions like this helps algebra make sense. If you don't want to compute with fractions, use a calculator or make a computer spreadsheet. Better yet, use the mental technology you always have with you (in your head), and learn the mental shortcuts below.

