Calculator

Roof Shingle Calculator

Estimate shingle bundles using roof area, pitch factor, and waste.

Use decimals when needed. Your estimate updates instantly and is safe to tweak before purchasing.

Read the matching guide to avoid common material ordering mistakes.

Roof Shingle Calculator FAQ

What is a roofing square?

A square equals 100 square feet of roof area.

Why include pitch factor?

Steeper roofs have more actual surface area than the footprint.