Roofing Calculator

Estimate roof area, roofing squares, and waste-adjusted material coverage from roof dimensions and pitch factor.

Preparing Roofing Calculator

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Input

Enter roof dimensions, pitch factor, and waste allowance to estimate material coverage for the roof area. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Roofing Calculator

Provide the roof dimensions and pitch adjustment, and the calculator will estimate the sloped coverage area and roofing squares required.

What this calculator is for

This calculator is for shingles, underlayment, and roofing-material planning when a simple footprint needs to be adjusted into a slope-aware coverage estimate.

Tips

Use a realistic pitch factor instead of assuming a flat roof area if the roof has noticeable slope.
Waste percentages often rise on complex roofs with cuts and valleys, so do not assume a low waste factor on intricate layouts.