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
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.