How Many Roof Shingles Do I Need? — The Complete Answer
The question "how many roof shingles do I need" depends on four variables: your roof area, roof pitch, shingle type, and waste factor. This guide gives you definitive answers for every common scenario.
A typical 1,500 sq ft home needs 50–60 bundles (1,050–1,560 individual shingles) depending on pitch and shingle type.
Shingle Quantities by Roof Size
| Roof Footprint | Common Pitch | Sloped Area | Bundles (10% waste) | Arch. Shingles | 3-Tab Shingles |
|---|---|---|---|---|---|
| 800 sq ft | 6/12 | 894 sq ft | 30 | 630 | 780 |
| 1,000 sq ft | 6/12 | 1,118 sq ft | 37 | 777 | 962 |
| 1,200 sq ft | 6/12 | 1,342 sq ft | 45 | 945 | 1,170 |
| 1,500 sq ft | 6/12 | 1,677 sq ft | 56 | 1,176 | 1,456 |
| 2,000 sq ft | 6/12 | 2,236 sq ft | 74 | 1,554 | 1,924 |
| 2,500 sq ft | 6/12 | 2,795 sq ft | 93 | 1,953 | 2,418 |
| 3,000 sq ft | 6/12 | 3,354 sq ft | 111 | 2,331 | 2,886 |
Quantities by Roof Shape
Roof shape affects the waste factor, not the base calculation. Here's how different shapes compare for a 1,500 sq ft footprint at 6/12 pitch:
| Roof Shape | Waste Factor | Bundles | Why More/Less Waste? |
|---|---|---|---|
| Simple Gable | 10% | 56 | Minimal cuts — straight edges only |
| Cross Gable | 12% | 58 | Valley cuts where gables intersect |
| Hip Roof | 15% | 62 | Angled hip ridges require more cuts |
| Gambrel | 12% | 58 | Extra ridge line, two pitch transitions |
| Complex (dormers+valleys) | 20% | 68 | Many cuts at dormers, valleys, and ridges |
For hip roofs, use our dedicated hip roof calculator. For gambrel roofs, use the gambrel roof calculator.
Individual Shingle Count by Type
The number of individual shingles varies significantly by type because each type has a different size and weight:
- Architectural shingles: ~21 per bundle, 63 per square — thicker, heavier, more durable
- 3-Tab shingles: ~26 per bundle, 78 per square — thinner, lighter, more affordable
- Premium/Designer shingles: ~15–18 per bundle, may need 4–5 bundles per square
For a detailed comparison, see our guide on how many roof shingles per bundle.
Frequently Asked Questions
How many shingles do I need for a 20 × 20 garage?
A 20 × 20 ft garage = 400 sq ft footprint. With a 5/12 pitch and 10% waste: 400 × 1.083 × 1.10 = 476 sq ft → 4.8 squares → 15 bundles (~315 architectural shingles).
How many shingles for a 2,000 sq ft house?
A 2,000 sq ft single-story home typically has a ~2,000 sq ft footprint (plus overhangs). With a 6/12 pitch and 10% waste: approximately 74 bundles. Two-story homes have a smaller roof, needing ~40–50 bundles. Use our calculator for your exact dimensions.
Get Your Exact Shingle Count
Enter your roof dimensions into our free roof shingle calculator for precise bundles, individual shingle count, and cost estimate.
Open Calculator →