Roof Pitch by Degrees

Roof Pitch and the corresponding degrees:
12/1 = 4 degrees
12/2 = 9.5
12/3 = 14
12/4 = 18.5
12/5 = 22.5
12/6 = 26.5
12/7 = 30.5
12/8 = 33.75
12/9 = 37
12/10 = 40
12/11 = 42.5
12/12 = 45