Free Roofing Calculator - Material Estimation Made Easy
Calculate roofing materials needed including shingles, squares, and underlayment. Estimate costs and quantities for roof replacement or new construction.
Quick Answer
One roofing square = 100 sq ft. Standard shingles: 3 bundles per square. Multiply footprint by pitch factor for actual roof area.
Key Facts about Roofing Calculator:
- 1 square = 100 square feet
- 3 bundles per square (standard)
- Add 10-15% for waste/cuts
- Pitch affects total area
- 6/12 pitch multiplier: 1.118
Why Use Our Roofing Calculator?
Complete roofing calculations:
Square Calculator
Calculate roofing squares.
Bundles
Shingle bundle count.
Pitch Adjustment
Factor in roof pitch.
Cost Estimate
Material costs.
Instant Results
Get estimates immediately.
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Your data stays private.
How to Roofing Calculator in 3 Easy Steps
Calculate roofing:
Enter Dimensions
Roof footprint size.
Enter Pitch
Roof slope.
Get Materials
See squares and bundles.
Order Accurately
Accurate estimates
Factor in pitch
Include waste factor
Budget planning
Common Use Cases for Roofing Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our roofing calculator
What is a roofing square?
1 square = 100 square feet of roof area
A roofing square is 100 square feet. A 2,000 sq ft roof is 20 squares. Materials are typically sold by the square for easy estimation.
How many bundles of shingles per square?
3 bundles per square (standard), 4-5 for architectural
Typically 3 bundles per square for standard shingles. Some architectural shingles require 4-5 bundles per square. Always check manufacturer specifications.
How do I calculate roof area with pitch?
Footprint × pitch factor (6/12 pitch = multiply by 1.118)
Multiply footprint by pitch factor. Common factors: 4/12 pitch = 1.054, 6/12 = 1.118, 8/12 = 1.202, 12/12 = 1.414. A 1500 sq ft footprint at 6/12 pitch = 1677 sq ft roof.
Still have questions? Try the tool yourself!
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