Free Tool
Enter your roof's ground footprint and pitch — or its actual area — and get the number of roofing squares, shingle bundles, and waste to order. One square equals 100 square feet.
1 square = 100 ft² · footprint × pitch, or actual roof area
Squares = roof area ÷ 100, plus waste. Footprint mode multiplies by the pitch factor √(rise² + 12²) ÷ 12. Bundles default to 3 per square (typical architectural shingles).
Know how many squares and bundles your roof needs before you call for quotes — so you can sanity-check every bid and understand what you're paying for.
Measure the footprint, pick the pitch, and get squares, bundles, and a priced total in seconds. In ServicePros Hub, the result drops straight into a proposal line.
Roofers price by the square — and one square covers 100 square feet of roof.
If you only know the building's ground footprint, the roof itself is larger because it's sloped. We multiply the footprint by a pitch factor — √(rise² + 12²) ÷ 12 — to get the true sloped area. A 6/12 pitch, for example, multiplies the footprint by about 1.118. If you already have the actual roof area, switch the mode and skip the pitch step.
Squares = roof area ÷ 100, plus a waste allowance (12% is typical, more for complex roofs with lots of valleys and hips). Architectural shingles come 3 bundles to a square; the calculator rounds bundles up to whole units.
A roofing square is a unit of roof area equal to 100 square feet. Roofers estimate and price materials and labor by the square, so a 2,000 ft² roof is 20 squares before waste.
Most architectural (dimensional) shingles come 3 bundles per square. Some heavier or specialty shingles run 4 or 5 bundles per square — adjust the "bundles per square" field to match your product.
If you measure the ground footprint, multiply it by the pitch factor √(rise² + 144) ÷ 12 to get the true sloped area. A steeper pitch means more roof area for the same footprint. The calculator applies this automatically in footprint mode.
A 10–15% waste allowance is typical; 12% is a good default. Add more for cut-up roofs with many valleys, hips, and dormers, and for starter and ridge cap coverage.
Divide your total sloped roof area by 100. If you only know the footprint, multiply by the pitch factor first. A simple 1,600 ft² footprint at a 6/12 pitch is about 17.9 squares before waste.
This calculator is one of the trade tools inside ServicePros Hub — proposals, scheduling, invoicing, and card payments for home-service pros. One flat price. No tiers, no add-ons.
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