This is a shortcut to convert Fahrenheit to Celsius and vice versa.

The answer you will get will not be an exact one.. but approximate**Fahrenheit to Celsius:**

Take 30 away from the Fahrenheit, and then divide the answer by two.

This is your answer in Celsius.

Example:

74 Fahrenheit - 30 = 44. Then divide by two, 22 Celsius.

So 74 Fahrenheit = 22 Celsius.

Celsius to Fahrenheit just do the reverse:

Double it, and then add 30.

30 Celsius double it, is 60, then add 30 is 90

30 Celsius = 90 Fahrenheit

Remember, the answer is not exact but it gives you a rough idea.