Roof Rise And Run Calculator

Drag sliders to animate the results and diagram.

Roof rise and run calculator.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. 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. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. 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. Pitch tan angle where angle is the roof pitch expressed in degrees. Rise run pitch where pitch is expressed in percent. 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.

Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. The run is the distance from the outside of the wall to the inside of the ridge. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Rafter run outer wall this should be measured starting from the center of the roof span and then extending to the very edge of the exterior wall.

Roof pitch calculator calculate roof pitches with this free and simple online tool. This calculator is to be used as an estimating tool only. Here the number is 1166 66 inches. Enter the rise and run for the pitch length and angle of the rafter.

Input the rafter span on the flat eave overhang and pitch of the roof. In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. Here the number is 941 86 inches. 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. 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. The triangle diagram will be re drawn to scale with all dimensions marked. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.