Estimate Bundles With the Calculator
The roofing squares calculator estimates shingle bundles using three bundles per square. That is a planning shortcut, not a substitute for product-specific coverage.
The Common 3-Bundle Rule
For many common asphalt shingles, one roofing square is covered by about three bundles. If a roof estimate calls for 26 squares, the rough bundle estimate would be 78 bundles before product-specific adjustments.
| Estimated squares | Planning bundle count at 3 bundles per square |
|---|---|
| 15 squares | 45 bundles |
| 20 squares | 60 bundles |
| 26 squares | 78 bundles |
| 32 squares | 96 bundles |
Why Bundle Counts Vary
Bundle coverage can vary for 3-tab shingles, architectural shingles, premium designer shingles, starter shingles, and ridge cap products. Some products are heavier or packaged differently. Some roof systems use separate starter and ridge products rather than cutting field shingles.
Because of that, a supplier or contractor should convert the final measured squares into the exact product order.
Do Not Forget Accessories
Field shingles are only one part of the material order. Underlayment, drip edge, flashing, fasteners, ridge vent, pipe boots, sealant, starter shingles, ridge cap shingles, and disposal may also be needed.