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🏠 Roofing Calculator
Calculate roofing materials needed
About Roofing Calculator
Calculate roofing materials needed. Enter your measurements to get an accurate estimate of materials needed for your project.
Understanding Roofing Squares
- Roofing Square: One square = 100 square feet of roof area
- Roof Pitch: The slope affects total area (steeper = more material)
- Waste Factor: Add 10-15% for cuts, overlaps, and mistakes
- Shingle Bundles: Typically 3 bundles = 1 square
Roof Pitch Guide
- 4/12 Pitch: 4 inches of rise per 12 inches of run (common residential)
- 6/12 Pitch: 6 inches of rise per 12 inches of run (moderate slope)
- 8/12 Pitch: 8 inches of rise per 12 inches of run (steep slope)
- 12/12 Pitch: 12 inches of rise per 12 inches of run (45-degree angle)
Frequently Asked Questions
How do I measure my roof pitch?
Use a level and tape measure. Place a level horizontally, measure 12 inches out, then measure vertically from that point to the roof. A 6-inch vertical measurement = 6/12 pitch.
How many bundles of shingles do I need?
Multiply the number of squares by 3. For example, if you need 15 squares, you need 45 bundles (15 × 3 = 45).
Should I include the overhang in my measurements?
Yes, include roof overhangs (eaves) in your measurements as they need to be covered with shingles too.
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