This table provides the roof pitch multiplier for roofs of various slopes. The multiplier is used when figuring out the area of a roof. For a detailed description of how the multiplier is used, see "How to Find the Area of a Sloped Roof".

Roof Pitch (In Degrees) Roof Pitch Multiplier
1/12 4.76° 1.003
2/12 9.46° 1.014
3/12 14.04° 1.031
4/12 18.43° 1.054
5/12 22.62° 1.083
6/12 26.57° 1.118
7/12 30.26° 1.158
8/12 33.69° 1.202
9/12 36.87° 1.250
10/12 39.81° 1.302
11/12 42.51° 1.357
12/12 45° 1.414
13/12 47.29° 1.474
14/12 49.4° 1.537
15/12 51.34° 1.601
16/12 53.13° 1.667
17/12 54.78° 1.734
18/12 56.31° 1.803
19/12 57.72° 1.873
20/12 59.04° 1.944
21/12 60.26° 2.016
22/12 61.39° 2.088
23/12 62.45° 2.162
24/12 63.43° 2.236
25/12 64.36° 2.311
26/12 65.22° 2.386
27/12 66.04° 2.462
28/12 66.80° 2.539
29/12 67.52° 2.615
30/12 68.20° 2.693