Free Roofing Calculator
Roof Pitch Calculator
Convert roof rise and run into standard roof pitch, roof angle, slope percentage and surface-area correction factor.
Roof Pitch Calculator
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Roof pitch is the amount the roof rises vertically for a given horizontal run. Residential roof pitch is commonly expressed as rise per 12 inches of run.
Calculate roof pitch
Enter the vertical rise and horizontal run to calculate pitch, angle and slope factor.
What does 6/12 roof pitch mean?
A 6/12 roof rises 6 inches vertically for every 12 inches of horizontal run. Increasing the rise makes the roof steeper.
Why roof pitch matters
Pitch affects roof surface area, material requirements, drainage and installation difficulty. Steeper roofs generally have greater surface area than their horizontal footprint.
Use your pitch to estimate roof area
Once you know the pitch, use RooferNet's roof area calculator to estimate the total roof surface.
Roof Area Calculator