Estimate roof area, roofing squares, and shingle bundles from footprint and pitch.
Planning estimate only. Verify dimensions, waste, coverage, product specifications, and local requirements before purchasing materials.
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Adjusted roof area = footprint area × √(1 + (rise ÷ 12)²). Roofing squares equal adjusted area ÷ 100, before waste is added.
A 40 ft × 25 ft footprint with a 6-in-12 pitch is adjusted by the slope factor, then increased by the selected waste allowance.
A roofing square is 100 square feet of roof surface.
No. A sloped roof has more surface area than its horizontal footprint.
No. It is a planning estimate; complex roofs should be professionally measured.
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