Roof Pitch Calculator

Calculate roof pitch from rise and run. Degrees, ratio, percentage. Rafter length calculator.

Rise (inches)

Run (inches, per 12" standard)

Total Roof Span (feet)

Overhang (inches)

Standard pitch is expressed as rise per 12 inches of run (e.g., 6/12 means 6 inches rise for every 12 inches of horizontal run).

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