Calculate the total roof area, roofing squares, and shingle bundles needed for any roof based on footprint dimensions and pitch.
| Pitch | Multiplier | Category |
|---|---|---|
| 2/12 | 1.014 | Low slope |
| 4/12 | 1.054 | Standard |
| 6/12 | 1.118 | Standard |
| 8/12 | 1.202 | Steep |
| 10/12 | 1.302 | Very steep |
| 12/12 | 1.414 | 45° |
1 roofing square = 100 sq ft. Most shingles come in 3 bundles per square, with each bundle covering ~33 sq ft.