Roof Shingles Calculator
Count shingle bundles for a roof area, with a waste allowance.
Quick answer: enter your details below and click Count Bundles — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Measure the roof area including its slope, not just the footprint.
- Enter the coverage of one bundle.
- Click Count Bundles.
About this tool
Enter the roof area including slope, and the coverage of one bundle, and the tool adds a 10 percent allowance for cuts at hips, valleys, and edges before rounding up. The allowance is shown separately.
Frequently asked questions
Do ridge caps need extra bundles?
Ridge caps are often counted separately, so check whether your bundle figure already includes them.
Should complex roofs allow more?
Yes, roofs with many valleys or dormers may need a 15 percent allowance.