How Many Bundles of Shingles Do I Need for a 1200 Sq Ft Roof?

Quick Answer

A 1200 square foot roof is 12 roofing squares. With 10% waste and 3 bundles per square, plan for about 40 bundles.

Use the [Roofing Calculator](/roofing-calculator) to adjust the dimensions, waste factor, product coverage, and unit price for your exact project.

Formula

``

Bundles = roof area / 100 x waste factor x bundles per square

``

Example Estimate

1. 1200 square feet / 100 = 12 squares.

2. Add 10% waste = 13.2 squares.

3. 13.2 x 3 bundles per square = 39.6.

4. Round up to 40 bundles.

Reference Table

| Roof area | Squares with 10% waste | Bundles at 3/square |

|---|---:|---:|

| 1000 sq ft | 11 | 33 |

| 1200 sq ft | 13.2 | 40 |

| 1500 sq ft | 16.5 | 50 |

Practical Tips

- Apply pitch factor if the area is based on footprint.

- Include starter shingles and ridge caps.

- Order matching shingles for future repairs.

When to Round Up

Round up when the project has cuts, corners, fragile materials, uneven surfaces, delivery minimums, or any chance that matching the same product later will be difficult.

Next Step

Open the [Roofing Calculator](/roofing-calculator), enter your exact numbers, and save the estimate before buying materials.