Roofing Calculator
Calculate roofing squares, shingles, underlayment, and total installation cost using 2026 US pricing.
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The Roofing Calculator is included in the Pro plan. Upgrade to unlock all 10 trade calculators, unlimited estimates, PDF export, and Gemini AI advisor.
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Frequently asked questions
Roofing costs are measured in squares — one square equals 100 square feet. The actual roof area depends on both footprint and pitch. A 6/12 pitch adds about 12% to the footprint area, while a 12/12 pitch adds over 41%.