🧱 Roof Calculator

Calculate roof area, shingle bundles, and roofing squares needed for your roofing project.

Roof Dimensions

Roof Length (ft)

Roof Width / Span (ft)

Roof Pitch

Waste Allowance (%)

Roof Squares: One roofing square = 100 sq ft of roof area.

Shingle Bundles: Typically 3 bundles per square for 3-tab asphalt shingles, or 4 bundles for architectural shingles.

Pitch Factor: A steeper roof has more surface area. The pitch multiplier accounts for this increase over the flat footprint area.