Roof Pitch and Material Calculator
Enter roof run, rise, and length to estimate pitch, slope length, and roofing material area.
Use 5?10% to account for overlaps and cuts.
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How roof pitch and materials are calculated
Slope length is calculated using the run and rise with the Pythagorean theorem.
Roof area is slope length multiplied by roof length. A waste allowance is added for overlaps and cuts.
Pitch is expressed as rise per 12 units of run and also converted to degrees.