Roofing Shingles Calculator
Estimate asphalt shingles in roofing squares (100 sq ft) and bundles. Enter the actual roof-surface area - measured along the slope, not the ground footprint.
Roofing Shingles calculator
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How to estimate roofing shingles
- Measure the sloped roof area, not the building footprint. Multiply footprint by a pitch factor (~1.05-1.25) if estimating from the ground.
- Three bundles cover one square for most architectural shingles. Add 10% for hips, valleys and starter.
- Order matching ridge cap, starter strip, underlayment and drip edge alongside the field shingles.
Frequently asked questions
How many bundles of shingles in a square?
Three bundles per square for standard architectural shingles.
What is a roofing square?
A square is 100 square feet of roof surface - the standard unit for ordering and pricing roofing.