The following table shows common roof slopes expressed in their ratio of rise/run, degrees, and percentage equivalents.

Roof Slope
(Rise Over Run)		 Roof Slope
(Degrees)		 Roof Slope (Percentage)
0.25/12 1.193° 2.083 %
0.5/12 2.386° 4.167 %
1/12 4.76° 8.333 %
2/12 9.46° 16.667 %
3/12 14.04° 25.000 %
4/12 18.43° 33.333 %
5/12 22.62° 41.667 %
6/12 26.57° 50.000 %
7/12 30.26° 58.333 %
8/12 33.69° 66.667 %
9/12 36.87° 75.000 %
10/12 39.81° 83.333 %
11/12 42.51° 91.667 %
12/12 45° 100.000 %
13/12 47.29° 108.333 %
14/12 49.4° 116.667 %
15/12 51.34° 125.000 %
16/12 53.13° 133.333 %
17/12 54.78° 141.667 %
18/12 56.31° 150.000 %
19/12 57.72° 158.333 %
20/12 59.04° 166.667 %
21/12 60.26° 175.000 %
22/12 61.39° 183.333 %
23/12 62.45° 191.667 %
24/12 63.43° 200.000 %
25/12 64.36° 208.333 %
26/12 65.22° 216.667 %
27/12 66.04° 225.000 %
28/12 66.80° 233.333 %
29/12 67.52° 241.667 %
30/12 68.20° 250.000 %