Roofing Materials Calculator

Estimate total roof square footage, roofing squares, shingle bundles, underlayment rolls, ridge cap, and nails for any pitch. Adjust the waste factor to match cut-up roofs or simple gables. Built for roofers, GCs, and homeowners planning a re-roof.

Roofing Calculator

Roof section length (ft)

Roof section width (ft)

Number of roof sections

Pitch

Waste factor (%)

Ridge length (ft) (for ridge cap)

Materials

Total roof area—

Roofing squares (100 sq ft)—

Shingle bundles (3 per square)—

Underlayment rolls (400 sq ft each)—

Ridge cap bundles—

Estimated nails (lbs)—

3 bundles = 1 square for standard 3-tab shingles. Architectural shingles typically run 3–4 bundles per square depending on weight.