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Roofing Cost Calculator
Planning a roof replacement? Enter your roof dimensions, pitch, and material to estimate the number of squares, bundles needed, and a cost range from budget to premium.
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How This Calculator Works
This calculator converts your flat roof dimensions into actual roof area using a pitch multiplier, adds 10% for waste, then estimates material and labor costs per roofing square (100 sq ft).
Formula: Roof Area = Length × Width × Pitch Factor × 1.10. Squares = Roof Area ÷ 100. Bundles = Squares × 3. Cost = Squares × Cost per Square.
Assumptions & Limitations
- • Pitch factors use standard geometry multipliers.
- • 10% waste included for ridge caps, valleys, and cuts.
- • Cost ranges include materials and typical labor.
- • Actual costs vary significantly by region and roof complexity.