Roofing Calculator

Roof Dimensions

Length (ft)

Please enter a valid length.

Width (ft)

Please enter a valid width.

Pitch (rise/12)

Waste Factor (%)

Enter waste between 0 and 100.

Results

Shingles (bundles)0

Underlayment (rolls)0

Nails (lbs)0

Formula: Roof Area = Length × Width × Pitch Factor. Pitch Factor = sqrt((rise/12)^2 + 1). Shingles: Area / 33.33 (sq ft per bundle). Underlayment: Area / 400 (sq ft per roll). Nails: (Area / 100) × 2.5.