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Roof Pitch Calculator

Pitch, angle, and slope factor from rise.

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How to use this calculator

  1. Measure rise in inches over a 12-inch run.
  2. See pitch, angle, and slope factor.
  3. Use the factor to convert footprint to roof area.

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Frequently asked questions

What is roof pitch?
Roof pitch is the rise in inches over a 12-inch horizontal run. A 6/12 pitch rises 6 inches per foot.
How do I find roof area from pitch?
Multiply the flat footprint by the slope factor (for example 1.118 for a 6/12 pitch) to get the actual sloped roof area.
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