Roofing Shingles Calculator
Squares and bundles of shingles for a roof.
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How to use this calculator
- Enter your roof's total area.
- Pick a waste factor for the roof shape.
- See squares and bundles to order.
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Frequently asked questions
- How many bundles of shingles in a square?
- Most architectural and 3-tab shingles come three bundles to a square (100 square feet).
- How do I measure roof area?
- Multiply length × width of each roof plane and add them. Steeper pitches add area — about 1.1–1.4× the footprint.