Roofing Calculator
Estimate the true surface area of your roof, account for pitch and waste, then calculate how many bundles of shingles you need and what they will cost.
Bundles needed
38
12.37 squares at ~33 sq ft per bundle
Estimated material cost
$1,216
38 bundles × $32
- Footprint area
- 988 sq ft
- Pitch multiplier
- 1.118×
- Sloped roof area
- 1,104.6 sq ft
- Adjusted area (with waste)
- 1,237.2 sq ft
- Squares (100 sq ft units)
- 12.37
- Bundles (rounded up)
- 38
Pitch factor uses √((rise/12)² + 1). Waste covers cuts, overlaps, starter courses, and ridge. Coverage varies by shingle type—verify with your supplier. Prices shown are materials only and exclude underlayment, flashing, drip edge, labor, and disposal.
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