Roofing Calculator

Calculate the roofing area in squares (100 sq ft units) and the number of shingle bundles needed, including waste allowance.

Inputs
Results
Roofing Squares Needed
22
Shingle Bundles Needed
66

Try an example

Formula

Squares = Area × (1 + Waste%) / 100

Learn How This Works

How to Estimate Bricks, Stairs, and Roofing Materials

The material-estimation formulas behind brick counts, stair rise/run, and roofing squares, worked through with real projects.

Replacing a Roof: How Contractors Actually Estimate Materials

How roofing squares, waste allowance, and shingle bundle counts are calculated, so you can sanity-check a roofing quote.

Frequently Asked Questions

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