How many shingles for a 1,500 sq ft roof?
Quick Answer
A house with a 1,500 square foot footprint and a 4/12 pitch has an actual roof area of about 1,580 sq ft (1,500 × 1.054 pitch factor), or 15.8 roofing squares. Adding 10% waste gives 17.4 squares — order 18 squares (54 bundles, since 3 bundles = 1 square). Steeper pitches need more material.
Quick Reference Table
| Footprint + Pitch | Squares needed (incl. 10% waste) |
|---|---|
| 1,500 sq ft / 4:12 | 17–18 squares / 51–54 bundles |
| 1,500 sq ft / 6:12 | 19–20 squares / 57–60 bundles |
| 1,500 sq ft / 8:12 | 21–22 squares / 63–66 bundles |
| 2,000 sq ft / 4:12 | 23–24 squares / 69–72 bundles |
| 2,000 sq ft / 6:12 | 25–27 squares / 75–81 bundles |
| 2,500 sq ft / 4:12 | 29–30 squares / 87–90 bundles |
How to Calculate It Yourself
- 1
Measure the flat footprint of the roof (length × width of the house).
- 2
Apply pitch multiplier: 4/12 pitch → ×1.054, 6/12 → ×1.118, 8/12 → ×1.202, 12/12 → ×1.414.
- 3
Add 10% waste: multiply by 1.10. Divide by 100 to get roofing squares.
- 4
Convert to bundles: multiply squares by 3 (standard architectural shingles). Add ridge cap bundles separately (1 bundle per 35 linear feet of ridge).
Pro Tip
Buy all shingles from the same lot number — color can vary between production runs. If your job takes more than one delivery, confirm all bundles share the same lot code printed on the wrapper.
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