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Roof Shingle Bundles Needed Calculator

Bundles = ceil(roof_area · (1 + waste) / coverage_per_bundle).

Compute the number of standard 3-tab asphalt shingle bundles needed for a sloped roof, given roof area, a waste allowance for cuts and ridge trim, and the coverage of a single bundle (default 33.3 sqft, i.e. 3 bundles per "square").

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

sq ft
%
sq ft

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Bundles = ceil(area · (1 + waste %) / coverage_per_bundle)

In depth

Compute the number of standard 3-tab asphalt shingle bundles needed for a sloped roof, given roof area, a waste allowance for cuts and ridge trim, and the coverage of a single bundle (default 33.3 sqft, i.e. 3 bundles per "square").