Fahrenheit and Celsius temperatures are exactly the same only at -40 degrees. That is, -40°F and -40°C are the same temperature. To convert Fahrenheit to Celsius, take the Fahrenheit temperature, subtract 32, then divide that number by 9 and multiply the result by 5. So, (1) -40 - 32 = -72; (2) -72 / 9 = -8; and (3) -8 x 5 = -40.

More Temperature Facts: