Roof Shingle Calculator
Estimate the number of shingle squares and bundles required for any roof area and pitch.
Roofing Materials
📊 Summary
💡 Roofing Tips
- • 1 square = 100 sq ft of roofing
- • Steeper pitch requires more material
- • Add 10-15% for waste and overlaps
- • Most bundles contain ~33 shingles
- • 3 bundles typically = 1 square coverage
How it works
Pitch Factor = √(1 + (rise/12)²) Actual Roof Area = Base Area × Pitch Factor Squares = Roof Area / 100 Bundles = Squares × 3 Common Pitches: 4:12 = 1.054 factor 6:12 = 1.118 factor 8:12 = 1.202 factor 12:12 = 1.414 factor Example: 40ft × 30ft roof at 6:12 pitch Factor = 1.118 Area = 1200 × 1.118 = 1342 sq ft Squares = 14 (with ~10% waste)
The roof shingle calculator estimates roofing materials needed for residential projects. Enter roof dimensions and pitch to calculate squares (100 sq ft units), bundles, and total shingles required. Accounts for pitch angle and waste factor.
Why this matters
Accurate roofing estimates prevent material shortages and cost overruns. Roof pitch significantly affects total material needed (steeper roofs require more). Understanding bundles-per-square helps plan delivery and labor scheduling.
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Learn more
The complete guide to roof shingle calculator
Formulas, examples, and tips explained in plain English