basic

Roof Shingles Bundles from Square Footage Calculator

bundles = ceil(roof_sqft · waste_factor / sqft_per_bundle).

Compute the number of asphalt-shingle bundles needed to cover a given roof area, including a default 10-15 % waste factor for cuts, hips, valleys, and starter strips. A standard 3-tab bundle covers 33⅓ ft², so 3 bundles per square (100 ft²); architectural laminated bundles also typically yield ~33 ft².

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

ft²
ft²
%

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(sqft · (1 + waste/100) / sqft_per_bundle).

In depth

Compute the number of asphalt-shingle bundles needed to cover a given roof area, including a default 10-15 % waste factor for cuts, hips, valleys, and starter strips. A standard 3-tab bundle covers 33⅓ ft², so 3 bundles per square (100 ft²); architectural laminated bundles also typically yield ~33 ft².