Roof Replacement Cost Calculator
Estimate the cost to replace a residential roof. Calculate roofing squares, material cost, labor, and total replacement budget for asphalt shingles, metal, and tile roofing.
Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| Roof Replacement Cost Calculator | Roof Cost = Roofing Squares x Cost per Square + Labor | $ estimate |
Step-by-Step Examples
1,800 sq ft footprint, 6/12 pitch, architectural shingles.
- Pitch mult = 1.118 | Roof area = 1,800 x 1.118 x 1.10 = 2,213 sq ft
- Total: 2,213 x ($5.75 + $3.50 + $0.50) = $21,567
1,200 sq ft, 4/12 pitch, metal.
- Roof area: 1,200 x 1.054 x 1.10 = 1,391 sq ft
- Total: 1,391 x $15.50 = $21,561
2,500 sq ft, 8/12 pitch, tile.
- Roof area: 2,500 x 1.202 x 1.10 = 3,306 sq ft
- Total: 3,306 x $19 = $62,814
Real-World Applications
Common Mistakes to Avoid
Full replacement costs include tear-off of old shingles (+$0.50-1.50/sq ft), disposal, decking repairs (if needed, +$2-4/sq ft), new flashing, drip edge, and underlayment. Get an itemized quote.
Inspect your roof every 5 years. Watch for: granules in gutters, curling or buckling shingles, missing shingles, daylight in attic, and leaks after rain. Don't wait for interior water damage to replace.
Roofing prices vary significantly by contractor. Always get 3 quotes from licensed, insured roofers. Verify licenses with your state contractor board and check insurance certificates.