Formula and input notes
Job total = waste-adjusted roofing squares × (material + labor + tear-off per square) + fixed costs
| Input | Practical note |
|---|---|
| Slope factor | The slope factor converts horizontal plan area to sloped surface area. Derive it from the actual pitch rather than choosing it from appearance. |
Worked metal roof cost example
Metal Roof Cost Calculator example: 46.8 ft × 26.4 ft × 1.12 × 1.1 = 1,522.16 ft², or 15.22 roofing squares. The entered line items total 10,111.29 in the same currency as the inputs.
Read squares and sloped area
Use the line-item results to compare quote scope, not to substitute generic prices for current contractor and supplier proposals.
Geometry and accessories outside the total
Panel system, gauge, coating, trim, clips, deck repair, underlayment, access, pitch, geometry, region, permits, and disposal all affect installed cost.
Questions specific to this calculation
What is included in the displayed roof-cost total?
Enter roof plan dimensions, slope factor, waste, and local per-square material, labor, tear-off, and fixed-cost figures on a consistent scope basis.