Roofing Calculator
Calculate roofing squares, bundles, and material cost by pitch.
10% for simple roofs, 15-20% for complex
$300–500 asphalt, $700–1500 metal/tile
Roofing Squares Needed
14.8
squares (including 10% waste)
Footprint
1,200 sq ft
True Roof Area
1,342 sq ft
Bundles Needed
45 bundles
Pitch Factor
×1.118
Estimated Material Cost
$5,903
14.8 squares × $400/square · labor additional
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Frequently Asked Questions
What is a roofing square?
A roofing square equals 100 square feet of roof surface area. Most roofing materials are sold by the square. A typical 2,000 sq ft home has about 20–25 squares depending on pitch.
How do I calculate roof pitch factor?
Pitch factor accounts for the slope of your roof. A 6/12 pitch means 6 inches of rise per 12 inches of run, with a multiplier of 1.118. Steeper roofs have more surface area than the floor footprint.
How much does it cost to replace a roof?
Roof replacement averages $300–$500 per square for asphalt shingles, including labor and materials. A 20-square roof runs $6,000–$10,000. Premium materials (metal, tile) cost $500–$1,500+ per square.