How Does This Calculator Work?
The calculator divides rise by run to get the roof's slope ratio, then multiplies by 12 to express it in the standard "X-in-12" roofing convention.
Roof pitch is traditionally expressed as inches of rise for every 12 inches of horizontal run (e.g. a "6-in-12" roof). This calculator converts your measured rise and run into that standard format.
Example Calculation
Standard Roof Example
A roof rising 6 inches over a 12 inch run.
(6/12)×12 = 6-in-12 pitch.