Free Roof Area & Materials Calculator

Calculate roof area, material quantities, and project costs

Free — no account required
Roof pitch diagram showing rise, run, roof angle, eaves stick out, and base area.

Roof sections

Add each roof plane or building section separately, then get one combined estimate.

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Waste accounts for cuts, valleys, hips, mistakes, and roof complexity.
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Usually your all-in installed price per 100 sq ft. Leave blank to skip cost estimate.
Material price guideOptional helper. Choose a material to prefill a typical installed price, then adjust the number above.
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Enter your roof dimensions and click Calculate to see results.