Roof Area Calculator
Calculate total sloped roof area from footprint and pitch.
Horizontal projected area, not sloped area
Roof Area2,236sq ft
Squares22.36squares
Pitch Factor Reference
Pitch factor = slope multiplier (multiply footprint area by this value to get sloped area). Source: NRCA Roofing Manual.
| Pitch | Angle | Factor |
|---|---|---|
| 1:12 | 4.8° | 1.003 |
| 2:12 | 9.5° | 1.014 |
| 3:12 | 14.0° | 1.031 |
| 4:12 | 18.4° | 1.054 |
| 5:12 | 22.6° | 1.083 |
| 6:12 | 26.6° | 1.118 |
| 7:12 | 30.3° | 1.158 |
| 8:12 | 33.7° | 1.202 |
| 9:12 | 36.9° | 1.250 |
| 10:12 | 39.8° | 1.302 |
| 11:12 | 42.5° | 1.357 |
| 12:12 | 45.0° | 1.414 |