Saltbox Roof Pitch Calculator

Divide the results by the number of 12 inch segments in your level.

Saltbox roof pitch calculator.

Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. If you know the angle of the roof in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12. The preview window displays an elevation view of the roof that updates dynamically to reflect the actual dimensions of the roof including the difference in elevation between the front and rear wall plates. You can calculate slope area rafters length and other dimensions.

1 calculate roof slope based on rafters length. For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. First find the slope by finding the tangent of the degrees eg. This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof.

It will use the current cost of wooden rafters based on the average price found at home improvement stores. The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler.