Roof Pitch Factor
Stand in the yard, take one photo of the house, and our AI reads the roof slope for you — giving you the pitch (like 6/12), the pitch factor, and the true sloped roof area.
Take or upload an elevation photo
For the best read, capture the triangular gable end or the sloping edge of the roof against the sky. Stand back far enough to see the whole roof line.
True roof area calculator
Enter the building’s flat footprint (its “bird’s-eye” square footage). We multiply it by the pitch factor to get the real sloped roof area you’d actually cover with material.
Pitch factor reference
| Pitch | Angle | Pitch factor | Multiply footprint by |
|---|---|---|---|
| 2/12 | 9.5° | 1.014 | × 1.014 |
| 3/12 | 14.0° | 1.031 | × 1.031 |
| 4/12 | 18.4° | 1.054 | × 1.054 |
| 5/12 | 22.6° | 1.083 | × 1.083 |
| 6/12 | 26.6° | 1.118 | × 1.118 |
| 7/12 | 30.3° | 1.158 | × 1.158 |
| 8/12 | 33.7° | 1.202 | × 1.202 |
| 9/12 | 36.9° | 1.250 | × 1.250 |
| 10/12 | 39.8° | 1.302 | × 1.302 |
| 11/12 | 42.5° | 1.357 | × 1.357 |
| 12/12 | 45.0° | 1.414 | × 1.414 |
Need it verified on the roof?
A photo estimate is a great starting point. For an insurance claim, a roof replacement quote, or a 4-point / wind mitigation report, we’ll measure it for real and put it in writing.
Estimates are generated by AI from a single photo and are for planning only. Actual roof pitch and area should be confirmed by physical measurement before ordering material or filing a claim.