Shingle Calculator
Estimate shingle bundles for your roof replacement
Total roof area in sq ft
Affects bundles per square
For cuts and valleys
Roofing Squares
—
squares
Shingle Bundles
—
bundles
Roofing Nails
—
lbs
Underlayment Rolls
—
rolls
Material Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Accurately calculating shingle quantities prevents delays and waste. Our calculator accounts for roof area, shingle type, and waste factor.
- Measure or calculate your total roof area
- Select your shingle type
- Choose waste factor
- Enter specifications in the calculator
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Squares = Roof area / 100
Bundles = Squares x Bundles per square x (1 + Waste%)
Nails ~ 0.33 lbs per bundle
Frequently Asked Questions
How many shingle bundles per square?
3-tab: 3 bundles per square. Architectural: 3.5 bundles. Premium: 4 bundles per square.
What waste factor should I use?
Use 10% for simple gable roofs, 15% for hip roofs, and 20% for complex roofs with multiple dormers and valleys.