Roofing Shingle Calculator
Estimate roofing squares and shingle bundles using roof area, waste and bundles per square.
Project details
Estimate
Roofing squares—
Bundles to buy—
Planning estimate only. Verify product dimensions, manufacturer coverage, local requirements and field conditions before purchasing.
How shingle quantity is estimated
Roof area with waste is divided by 100 square feet to get roofing squares, then multiplied by the bundles-per-square value you enter.
bundles = roof area with waste ÷ 100 × bundles per square
Roofing Shingle Calculator FAQ
What is a roofing square?
One roofing square equals 100 square feet of roof surface.
Do all shingles use 3 bundles per square?
No. Check the product packaging because bundle coverage varies.
Does this include ridge caps?
No. Ridge-cap and starter materials should be estimated separately.