Roofing Calculator
Calculate roofing materials including shingles, underlayment, and accessories for your roof.
Roof Dimensions
Pitch multiplier adjusts flat area to sloped area
Roofing Material
Optional Details
For ridge cap shingle estimate
1 square = 100 sq ft of coverage
Roofing Squares Needed
0 squares
Total Roof Area
0 sq ft
Area + Waste
0 sq ft
Bundles Needed
0 bundles
Additional Materials
Underlayment Rolls (4x250')
0 rolls
Drip Edge
0 linear ft
Ridge Cap Bundles
0 bundles
Roofing Nails
0 lbs
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Roofing Guide
Understanding Roofing Measurements:
- Square: 100 square feet of roof area
- Bundle: Package of shingles (3 bundles = 1 square for most shingles)
- Pitch: Rise over run (4/12 means 4" rise per 12" horizontal)
Roof Pitch Factors:
- Steeper roofs require more material than footprint suggests
- 4/12 pitch: multiply footprint by 1.05
- 8/12 pitch: multiply footprint by 1.20
- 12/12 pitch: multiply footprint by 1.41
Material Comparison:
- 3-Tab Shingles: Budget-friendly, 15-20 year warranty
- Architectural: Dimensional look, 25-30+ year warranty
- Metal: Long-lasting (40-70 years), energy efficient
- Tile: Premium durability, 50+ years