Shingle Calculator
Asphalt shingles ship as bundles — three bundles cover one roofing square (100 ft²). Enter the footprint and pitch to get squares, bundles with waste, starter strip and ridge cap quantities.
Shingle Calculator
Roofing & Exterior
ft
ft
%
ft²
Shingle bundles
46bundles
16 squares
Roofing squares
15.03squares (100 ft²)
Starter strip
5rolls/bundles
140 lin ft of eaves
Ridge cap
3bundles
89 lin ft ridge/hip estimate
Roof area
1,342 ft² · 124.6 m²
Calculation breakdown
- 1Sloped area:
111.48 m² × 1.118 = 124.64 m² - 2With waste:
139.6 m² ÷ 3.09 m²/bundle = 46 bundles
- Roofing work at height is high-risk — use proper fall protection and see the safety policy.
Roof area = Footprint × Pitch multiplier · Squares = Area ÷ 100.
Bundles = ⌈Squares × (1 + Waste) × 3⌉.
Starter strip ≈ eave perimeter; ridge cap ≈ 35 lin ft per bundle.