Flat Roof Calculator
Calculate flat roof area, materials, and cost. Estimate for rectangles, triangles, and trapezoids. Calculate roofing materials, underlayment, and labor costs.
Step 1: Roof Shape & Dimensions
10%
Roofing Tips
Add 10-15% extra material for waste, cuts, and overlaps. For complex roofs, break into simple shapes. Always consult a professional for critical installations.
Step 2: Material & Cost
Cost Factors
Total cost = (Material + Labor) × Area + Waste + Additional components. Labor varies by region and complexity. Get multiple quotes for accurate pricing.
Flat Roof Calculation Results
Cost Summary
Materials Breakdown
Roofing Options
Total Estimated Cost
$3,960
600 sq ft Rectangular Roof
Total Roof Area
600 sq ft
Material Cost
$3,300
Labor Cost
$2,100
Cost per sq ft
$9.00
Materials Breakdown
| Material | Quantity | Unit Cost | Total Cost | Notes |
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Roofing Material Comparison
| Material | Cost per sq ft | Lifespan | Maintenance | Best For |
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