Enter your home's footprint and roof pitch to estimate total roofing square footage instantly.
| Pitch | Description | Multiply by |
|---|---|---|
| 1/12 – 2/12 | Flat / nearly flat | 1.00 – 1.02 |
| 4/12 | Low slope | 1.06 |
| 6/12 | Moderate (most common) | 1.12 |
| 8/12 | Steep | 1.20 |
| 10/12 | Very steep | 1.30 |
| 12/12 | Extreme (45°) | 1.41 |
Multiply your home's footprint (length × width) by the pitch factor for your roof. Then add 10–15% for waste and overlap. The result is the total roofing area in square feet.
One roofing square equals 100 square feet. Roofing contractors price materials and labor by the square. A typical 2,000 sq ft footprint home with a 6/12 pitch needs about 22–24 squares.
Asphalt shingles typically cost $350–$550 per square installed. Metal roofing runs $700–$1,200 per square. Tile roofing costs $800–$1,500 per square, including materials and labor.
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