Roof Pitch Calculator
Calculate roof pitch, angle, and rafter length from rise and run measurements.
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isCalculator Editorial Team
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How to use this tool?
This calculator determines roof pitch, angle, and rafter length from rise and run measurements.
- Enter Rise (inches): Input the vertical height of the roof (e.g., 6).
- Enter Run (inches): Input the horizontal distance (e.g., 12).
- Click "Calculate": Press the button to compute results.
Results:
- Pitch: Rise-to-run ratio (e.g., 0.5000 : 1).
- Angle: Roof slope in degrees (e.g., 26.57°).
- Rafter Length: Diagonal length in inches (e.g., 13.42 in).
All values use inches. Ensure positive numbers only.
Previous Results
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Frequently Asked Questions
Roof pitch is the steepness of a roof, expressed as a ratio of rise over run (e.g., 6:12).
Measure the vertical rise in inches over a horizontal run of 12 inches. Divide rise by run to get the pitch ratio.
Common residential roof pitches range from 4:12 to 12:12, depending on climate and style.