If you mean, what's the difference between Fahrenheit and Celsius degrees, it is this: the Celsius scale recognizes exactly 100 degrees between the freezing and boiling points of pure water in a standard atmosphere (i.e., 1 atm or about 15 psi). read more
The Fahrenheit and Celsius scales are the two most common temperature scales. However, the two scales use different measurements for the freezing and boiling points of water, and also use different sized degrees. To convert between Celsius and Fahrenheit you use a simple formula that takes this difference into account. read more
On the celcius scale the difference between the ice point and steam point of water is 100 celcius degree The fahrenheit and celcius scale concise at -40 degrees which means that -40° f and -40°celcius describe the same (very cold )temperature that is the difference between the degree and fahrenheit. read more