Disclaimer: The calculated area is only an estimation. In cases where a roof has a complex shape, measuring the dimensions and areas of each part of the roof to calculate the total area will result in a more accurate measurement. The calculator cannot account for complex shapes based on a measurement of square footage alone. For more accurate results with complex roof shapes, please use our Area Calculator to calculate the area of various simple shapes that together comprise the roof area.
| Pitch | Angle | Multiply By | Pitch | Angle | Multiply By | |
|---|---|---|---|---|---|---|
| 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 | |
| 13/12 | 47.3° | 1.474 | 14/12 | 49.4° | 1.537 | |
| 15/12 | 51.3° | 1.601 | 16/12 | 53.1° | 1.667 | |
| 17/12 | 54.8° | 1.734 | 18/12 | 56.3° | 1.803 | |
| 19/12 | 57.7° | 1.873 | 20/12 | 59.0° | 1.944 | |
| 21/12 | 60.3° | 2.016 | 22/12 | 61.4° | 2.088 | |
| 23/12 | 62.4° | 2.162 | 24/12 | 63.4° | 2.236 |