Roof Shingle Calculator
From Roof Area
Calculate shingles needed from known roof area
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From House Footprint
Estimate roof area from house footprint and roof pitch
Formula
Squares = Roof Area / 100 | Bundles = Squares × 3 (or 4-5 for heavy shingles)
Frequently Asked Questions
How many bundles of shingles do I need?
One roofing square covers 100 square feet. Most standard and architectural shingles come 3 bundles per square. So for a 2,000 sq ft roof: 2,000 / 100 = 20 squares × 3 = 60 bundles. Add 10-20% for waste depending on roof complexity.
How long do asphalt shingles last?
3-tab shingles last 15-20 years. Architectural/dimensional shingles last 25-30 years. Premium/designer shingles can last 30-50 years. Lifespan depends on climate, ventilation, installation quality, and maintenance.
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