Free Shingle Calculator — Bundles, Squares & Cost (2026)

How to Use This Calculator

1. 1Calculate total roof area including all slopes.
2. 2Enter in square feet.
3. 3Click Calculate — result shows bundles (3 bundles = 1 square = 100 sq ft).

About This Material

Asphalt shingles are the most popular residential roofing material in North America, covering over 75% of all homes. They come in two main styles: 3-tab shingles (flat, uniform appearance, 20-25 year warranty, lower cost) and architectural/dimensional shingles (layered, textured appearance, 30-50 year warranty, more wind resistant). Shingles are sold in bundles, with 3 bundles covering 1 roofing square (100 sq ft). Architectural shingles cost $30 to $50 per bundle, while premium designer shingles run $50 to $100 per bundle. Popular brands include GAF Timberline, CertainTeed Landmark, and Owens Corning Duration. Shingle color affects attic temperature — lighter colors reflect more heat in southern climates. Wind ratings range from 60 mph for basic 3-tab to 130 mph for high-wind architectural shingles. Ridge cap shingles are sold separately (about 20 linear feet per bundle) and are needed for all ridge and hip lines.

Installation Tips

• •Start from the eave, working up to the ridge.
• •Offset vertical joints by 6" minimum between courses.
• •Use 4 nails per shingle in standard conditions, 6 in high-wind areas.
• •Install ridge cap shingles separately (sold in separate bundles).

Common Mistakes to Avoid

• ⚠Not adding waste — always order extra for ridge cap, hips, and valleys.
• ⚠Under-nailing in high-wind zones.
• ⚠Not using ice and water shield in the first 2 feet from eave in cold climates.

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