Calculate Roof Pitch

Calculate the pitch, angle, and grade of a roof.

Vertical Rise (inches)

Horizontal Run (inches)

Pitch Ratio

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Angle

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The Methodology

Rise / Run

This tool uses the verified professional formula shown above. We cite our sources so you can trust every result.

How it works

In construction, roof pitch is often expressed as "X inches of rise per 12 inches of run." This tool converts that ratio into a degree angle and a percentage grade.