Rise And Run Roof Calculator

Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run.

Rise and run roof calculator.

The value displayed as the rise will be your x. Drag sliders to animate the results and diagram. Pitch tan angle where angle is the roof pitch expressed in degrees. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

The roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r. As aforementioned there is no standard pitch of a roof. Enter the rise and run for the pitch length and angle of the rafter. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length.

Calculate roof pitches with this free and simple online tool. In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. A roof pitch that is based on a fixed rise and run and does not end up with a whole number is known as a bastard pitch. This is rarely is a whole number it is not a rare event and it is not a nightmare.

The run is the distance from the outside of the wall to the inside of the ridge. Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. You ll need a level that is 12 or longer and a tape measure. The triangle diagram will be re drawn to scale with all dimensions marked.

Enter run and known pitch angle or rise to calculate other dimensions enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.