Construction Calculators

Roofing Material Calculator

Calculate roofing materials needed based on roof area and pitch.

Roof Length (ft)

Roof Width (ft)

Roof Pitch

Waste (%)

Roof Area0 sq ft

Total (with waste)0 sq ft

Roofing Squares0.0

Shingle Bundles0

Roofing Calculator Formula

Roof Area = Length × Width × Pitch Factor

Squares = Total Area / 100

A "roofing square" = 100 sq ft.

Roof: 40ft × 30ft, Medium pitch, 10% waste

Area = 40 × 30 × 1.118 = 1,342 sq ft

With waste = 1,476 sq ft = 14.8 squares

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