Calculate your roof's actual surface area based on footprint coordinates, pitch slope, and overhang dimensions.
📐 Roof Surface Area Calculator
Pitch Multiplier
Actual Roof Area
Squares Needed (100sqft)
💡 Pro Tip
Do not buy materials based on house floor plan area alone. Always apply the pitch multiplier and add 10% for shingles cutting wastage.
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Frequently Asked Questions
Q: How does pitch affect roof surface area?
A steeper pitch increases the multiplier factor. A 6/12 pitch has a multiplier of 1.118, meaning a 1,000 sq ft house footprint actually has 1,118 sq ft of roof surface area.
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