How Many Shingles Do I Need for 1000 Sq Ft?
Roofers measure in “squares” — one square is 100 square feet. A 1,000 sq ft roof needs 10 squares exactly, plus 10% for cuts and starter courses: 11 squares. With 3 bundles per square, order 33 bundles. The chart below scales to bigger roofs.
Key Takeaways
- One roofing square = 100 sq ft.
- 1,000 sq ft ÷ 100 = 10 squares exact.
- Add 10% → 11 squares.
- Three bundles per square → 33 bundles.
- Steep or cut-up roofs need 15% waste instead.
How to Calculate Shingles for 1000 Sq Ft
Measure the roof area (including pitch — not the footprint), convert to squares, add waste, then convert to bundles.
- 1Measure the roof area including slope: 1,000 sq ft.
- 2Convert to squares: 1,000 ÷ 100 = 10 squares.
- 3Add 10% waste: 10 × 1.10 = 11 squares.
- 4Convert to bundles: 11 × 3 = 33 bundles.
- 5Add ridge cap shingles separately for hips and ridges.
The Shingle Square Formula
A “square” is simply the trade unit for 100 sq ft of roof. Steep pitches, valleys, and dormers raise waste toward 15%.
Bundles = (Roof area ÷ 100) × 1.10 × 3Worked Example: 1,000 Sq Ft Roof
Full math for 1,000 sq ft of roof with standard shingles (3 bundles per square), plus a chart for larger roofs.
Roof area: 1,000 sq ft (measured along the slope).
Squares: 1,000 ÷ 100 = 10.
Waste: 10 × 10% = 1 square.
Total: 11 squares.
Bundles: 11 × 3 = 33 bundles.
| Roof area | Squares (exact) | With 10% waste | Bundles |
|---|---|---|---|
| 1,000 sq ft | 10 | 11 | 33 |
| 1,500 sq ft | 15 | 17 | 51 |
| 2,000 sq ft | 20 | 22 | 66 |
Common Mistakes
- Using the home’s footprint instead of the sloped roof area.
- Forgetting starter shingles and ridge caps.
- Under-ordering on steep or complex roofs (use 15%).
- Skipping underlayment and ice-and-water shield in the material list.
- Mixing shingle lots with slightly different color blends.
Practical Tips
- Measure each roof plane separately and add them up.
- Factor the pitch: multiply footprint by the slope factor.
- Order ridge caps by linear feet of ridge and hips.
- Keep a bundle sealed for future repairs.
- Double-check with the NOVORY Roofing Calculator.
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