Calculate roof area, pitch factor, roofing squares, shingle bundles, underlayment rolls and nails from the house size, overhang and roof pitch.
About this tool
Calculate roof area, pitch factor, squares and shingle bundles.
How to use Roofing Calculator
- Enter the house length, width and eave overhang.
- Choose the roof pitch and waste.
- Read the roof area, squares and materials.
Worked example
A 40 × 30 ft house with a 6/12 pitch and 12 in overhang has about 15.4 squares including waste, about 47 bundles of shingles.
What is roof pitch?
The rise in inches for every 12 in of run; 6/12 rises 6 in per foot.
How many bundles per square?
Three bundles of standard architectural shingles cover one square.
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