Roofing Calculator

Enter plan dimensions and roof pitch to estimate sloped roof area and common asphalt-shingle quantities.

Building length (ft)

Building width / span (ft)

Pitch (rise / 12)

Eave overhang each side (in)

Waste (%)

Bundle coverage (ft²)

Price per bundle ($)

—Roof surface

—Roofing squares

—Bundles

—Pitch factor

—Simple two-sided gable-roof area estimate.

Complex hips, valleys, dormers, flashing, starter/ridge materials, underlayment, local code, and installation details are not modeled.

How to use this Roofing Calculator

Estimate roof area, roofing squares, shingle bundles, and waste. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.