Roofing Calculator

Estimate roof area, roofing squares, shingle bundles and material cost for a simple gable-style roof.

How this roofing estimate works

Roofing is commonly measured in squares, where one square equals 100 square feet of roof surface. This calculator adjusts the building footprint for roof pitch, then applies your waste allowance before converting the result to squares and bundles.

Complex roofs with multiple valleys, dormers, hips or unusual shapes need a more detailed takeoff. Use this as a planning estimate and verify final quantities with your roofing supplier or contractor.

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