convert to celsius
1 0C is the freezing point of water (or more accurately the melting point of ice) and it is 32F.  A 1 Celsius change is a change of 1.8 Fahrenheits while a 1 Fahrenheit change translates to a change of 0.55 Celsius. This is one of the easiest way to convert them if you know that 0C = 32F.