Roofing Squares Calculator
Enter your roof area and pitch to convert square footage to roofing squares. One roofing square = 100 sq ft of sloped roof surface.
Inputs
Quick Reference: Area to Squares
| Roof Area (sq ft) | Exact Squares | + 15% Waste | Bundles (std. shingle) |
|---|---|---|---|
| 1,000 | 10.0 | 11.5 | 35 |
| 1,500 | 15.0 | 17.25 | 52 |
| 2,000 | 20.0 | 23.0 | 69 |
| 2,500 | 25.0 | 28.75 | 87 |
| 3,000 | 30.0 | 34.5 | 104 |
| 3,500 | 35.0 | 40.25 | 121 |
| 4,000 | 40.0 | 46.0 | 138 |
Bundle count assumes 3 bundles per square (standard architectural asphalt shingles), rounded up to the nearest bundle.
Related Tools
- Roofing Calculator — full estimator from footprint dimensions + pitch
- Shingle Calculator — bundles, nails, and underlayment
- Roof Area Calculator — compute sloped area from footprint
Frequently Asked Questions
One roofing square equals 100 square feet of roof surface area. This unit is the standard used by contractors, suppliers, and shingle manufacturers for ordering and estimating materials.
Divide your total sloped roof area (in square feet) by 100. For example, 2,200 sq ft ÷ 100 = 22 squares. Always measure the sloped surface area, not the floor footprint — pitch increases the surface area.
Always measure from the actual sloped roof surface, not the floor footprint. A 4/12 pitched roof over a 2,000 sq ft footprint has approximately 2,108 sq ft of sloped surface (2,000 × 1.054 pitch factor), not 2,000.
For standard 3-tab and architectural asphalt shingles, 3 bundles = 1 square. Order extra for waste: typically 10% for simple roofs, 15% for standard, 20–25% for complex roofs with many valleys or cut angles.