Roof Rise And Run Calculator

Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.

Roof rise and run calculator.

Roof pitch calculator calculate roof pitches with this free and simple online tool. Input the rafter span on the flat eave overhang and pitch of the roof. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Roof rise this should be calculated from the base of the roof to the highest point of the roof gable the peak.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Pitch tan angle where angle is the roof pitch expressed in degrees. 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. Here the number is 1166 66 inches.

In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. Enter the rise and run for the pitch length and angle of the rafter. 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. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch.

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. Drag sliders to animate the results and diagram. Use the diagrams on this page as a reference when inputting rise and run and while interpreting the calculated results.

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 roof pitch calculator calculates slope pitch angle and rafter lengths based on input of rise m and run r. 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 the number is 941 86 inches.

This calculator is to be used as an estimating tool only. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. Rise run pitch where pitch is expressed in percent. As aforementioned there is no standard pitch of a roof.