Roof Area & Material Estimator
Enter building footprint, pitch, and roof style — get roof square footage and material quantities. Try the hip roof example (40' × 28', 6/12 pitch).
Building footprint
Example: 6/12 = 6" rise per 12" run
Roof estimate
40' × 28' · 6/12 pitch
Hip roof · Architectural / dimensional shingles
Roof area
1,863 sq ft
18.6 squares with waste
Material order
75 bundles
Includes 15% waste
Footprint (with overhang)
1,260 sq ft
Pitch multiplier
6/12 pitch
1.118
Style multiplier
Hip roof
1.15
Net roof area
1,620 sq ft (18.6 squares)
Ridge cap (approx.)
47 LF
Roof area uses footprint × pitch × style multipliers — not a full takeoff. Valleys, dormers, and steep-slope surcharges can add significantly. Always measure on site or get a professional estimate.
Want a pro to handle it?
SMT Construction — roofing, repairs, and full replacements in Northeast Ohio.