Construction
Roof Shingles Calculator
Enter your roof area and ridge length, get bundles of shingles, rolls of underlayment, and ridge cap pieces with a 10% waste factor.
Shingle bundles
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- Squares
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- Underlayment rolls
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- Ridge cap pieces
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FAQ
How many bundles per square? +
Most asphalt shingles run 3 bundles per square (100 sq ft). Heavier architectural shingles can be 4 bundles per square — check the wrapper.
Should I add waste? +
10% is standard for a simple gable roof. Use 15% for hips, valleys, or complex roofs with lots of cuts.