Roof Pitch Calculator
Enter the rise and run to convert a roof slope into pitch (x/12), the angle in degrees, the slope multiplier for area, and the rafter length for a given span.
Estimate
How to use the roof pitch calculator
- Enter the rise (vertical) and run (horizontal) of the slope.
- Enter the building span to get a rafter length.
- Read the pitch, angle, slope multiplier, and rafter length.
Questions
What is roof pitch?
Pitch is the rise of a roof over a 12-inch run — a 6/12 roof rises 6 inches for every foot of horizontal run.