Roofing Material Calculator
Estimate roofing squares and bundles needed
Estimate how many squares and bundles of shingles a roof needs, based on the roof area and a waste allowance.
Estimate roofing material. A "square" covers 100 sq ft; standard shingles use 3 bundles per square.
Adjusted Area
1980
sq ft
Squares
19.8
Bundles
59
3 bundles / square
How to Use This Calculator
- Enter the roof area in square feet.
- Enter a waste percentage (cuts, overlaps, damage).
- Review the adjusted area, squares needed, and bundle count.
Why Use This Calculator?
- Ordering shingles for a roofing job.
- Comparing waste allowances.
- Checking a contractor's material list.
Real-World Examples
1,800 sq ft roof, 10% waste
With waste, that's 1,980 sq ft — about 20 squares, or roughly 59 bundles at 3 bundles per square.
Frequently Asked Questions
How many bundles are in a square?
For standard three-tab shingles, 3 bundles make a square. Heavier architectural shingles may need 4 bundles per square — check your product.
How much waste should I add?
10–15% is common for a simple roof; complex roofs with many valleys and cuts need more.
Does this include underlayment or flashing?
No. This estimates the shingles only. Underlayment, ice-and-water shield, flashing, and nails are figured separately.
Important Disclaimer
Estimates shingle quantities only. Bundle counts vary by product. Real roofs with valleys, dormers, and cuts need more waste. Verify with your supplier before ordering.
Privacy
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