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Roof Pitch Calculator
Calculate your roof pitch, angle, and slope with our professional roofing calculator
Free Tool by Paragon Exterior
Calculate Roof Pitch
Vertical measurement
Horizontal measurement
Common Roof Pitches
Flat Roof1/12
4.8°
Commercial buildings, modern homes
Low Pitch3/12
14.0°
Ranch homes, contemporary design
Standard Pitch6/12
26.6°
Most common residential pitch
Steep Pitch9/12
36.9°
Traditional colonial, Tudor styles
Very Steep12/12
45.0°
Victorian, Gothic styles
How to Measure Roof Pitch
1
Measure the Run
Mark a level 12-inch horizontal distance from the roof edge
2
Measure the Rise
Measure vertically from that point to the roof surface
3
Calculate Pitch
The rise over 12 inches of run gives you the pitch
Need Professional Help?
Our expert roofers can assess your roof pitch and recommend the best materials and installation methods.
Why Roof Pitch Matters
Roof pitch affects water drainage, snow load capacity, material choices, and overall aesthetics. Understanding your roof's pitch is crucial for:
- Selecting appropriate roofing materials
- Ensuring proper water drainage
- Meeting building code requirements
- Planning for snow load capacity
- Determining installation complexity and costs
Material Recommendations by Pitch
Flat to Low Pitch (0° - 10°)
EPDM, TPO, Modified Bitumen, Built-up roofing
Standard Pitch (10° - 30°)
Asphalt shingles, Metal roofing, Tile roofing
Steep Pitch (30°+)
All materials suitable, including specialty options