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Construction Calculators

Roof Shingle Bundles Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
m²
m²
%
Verified formula Private

Bundles needed

37

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Roof Shingle Bundles Calculator

The Roof Shingle Bundles Calculator works out your bundles needed in an instant. Enter roof area, coverage per bundle and wastage allowance and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the roof area.
  2. Enter the coverage per bundle.
  3. Enter the wastage allowance.
  4. Read off your bundles needed — the calculator updates automatically, with no button to press.

Worked example

For example, with roof area of 100 m², coverage per bundle of 3 m² and wastage allowance of 1%, the bundles needed is 37.

Inputs used
Roof area 100 m²
Coverage per bundle 3 m²
Wastage allowance 1%
Results
Bundles needed 37

Results are estimates for educational use, not professional advice.

Key terms explained

Area
The amount of two-dimensional space a shape covers, measured in square units.

Frequently asked questions

Divide the roof area, plus wastage, by the coverage per bundle and round up. 100 m² with 10% waste and 3 m² bundles needs 37 bundles.

It varies by product; check the pack. Three bundles often cover about one roofing square (9.3 m²).

Cuts at hips, valleys, ridges and edges waste material, so 10% extra is sensible, more for complex roofs.

Yes. Use the true sloped roof area, not the flat footprint, or you will under-order.

Enter the roof area. Enter the coverage per bundle. Enter the wastage allowance. Read off your bundles needed — the calculator updates automatically, with no button to press.

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