Roof Pitch Equation

For example a roof that rises 6 inches for every 12 inches of horizontal run has a 6 in 12 pitch.

Roof pitch equation.

In the imperial unit of measurements the slope is expressed with the rise and run. It is computed by using the simple roof slope formula. See the image below for more explanation on rise run and pitch. Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run.

The angle or pitch of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. 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. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. The pitch of this roof is 4 8 12.

A 12 in 12 pitch is a steep 45 degree angle roof. By slope angle formula steepness can be obtained by dividing vertical rise by horizontal span. 48 10 4 8. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

In civil engineering the slope is the numerical measure of the steepness of a roof. The value displayed as the rise will be your x. Roof slope is also called as roof pitch. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

The calculator above can handle much of this math. Now divide the rise by the multiplier to get the pitch eg. The pitch value can be obtained by dividing n by 12 and divide s by the answer. Pitch tan angle where angle is the roof pitch expressed in degrees.

How to measure roof pitch. Roof angle can be obtained by diving rise by run and take the tan inverse of the result. 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. Slope measures the angle of change in elevation which can be obtained by dividing rise by run and multiply the result with 100.

This page offers you the rise and run formula to find the pitch slope angle of the roof of a building. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.