How many shingles do I need?
Start with total roof area, add a waste allowance, then divide by the coverage supplied by one bundle of shingles.
Bundles = Adjusted roof area ÷ Coverage per bundle
Roof shingle example
A 1,500-square-foot roof with 10% waste becomes 1,650 square feet. With 33.3 square feet of coverage per bundle, approximately 50 bundles are required.
Check product specifications
Bundle coverage differs between products. Use the manufacturer's stated coverage for final ordering.
Frequently asked questions
How many square feet are in a roofing square?
100 square feet.
How many bundles make one square?
It varies by product. Many common shingles use roughly three bundles per square, but product specifications should be checked.
Why include waste?
Cutting, valleys, hips and roof complexity can increase material requirements.