Roofing · Area and material workbench

Measure the planes. Build the order.

Use pitch or angle, overhang, coverage, waste, and pricing to turn a simple roof plan into transparent package quantities.

Measurement guide
Roof diagram showing plan length, width per roof plane, roof plane, and pitch or slope

1 Measure the roof plan

2 Set pitch and allowance

3 Enter product coverage and cost

Results update automatically · slope multiplier 1.118

Method and limitations

Plan area × slope factor × allowance, then whole packages.

One roofing square equals 100 square feet. Shingle bundles and underlayment rolls round up independently from editable manufacturer coverage. Complex roof geometry requires field measurement.

Open the verified methodology for formula provenance, assumptions, a worked example, and limitations.