Rise And Run Roof Calculator

Drag sliders to animate the results and diagram.

Rise and run roof calculator.

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. The triangle diagram will be re drawn to scale with all dimensions marked. The run is the distance from the outside of the wall to the inside of the ridge. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

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. Enter the rise and run for the pitch length and angle of the rafter. This is rarely is a whole number it is not a rare event and it is not a nightmare. You ll need a level that is 12 or longer and a tape measure.

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. Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. Calculate roof pitches with this free and simple online tool.

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. Rise run pitch where pitch is expressed in percent. In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. The roof pitch calculator finds the length of the rafter and the roof slope in degrees and in percents and our roof pitch calculator also finds pitch in inches per foot slope degrees and rise over run.

The value displayed as the rise will be your x. Pitch tan angle where angle is the roof pitch expressed in degrees.