Formula For Figuring Out Roof Pitch

The angle or pitch of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally.

Formula for figuring out roof pitch.

Finally you can find the roof pitch in the form of x 12. 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. For example a roof that rises 6 inches for every 12 inches of horizontal run has a 6 in 12 pitch. The slope is the same as the pitch.

For a roof with the ridge above one wall the span is the same as the run. Find out how to calculate roof pitch on an existing roof. Divide the slope by two to get the pitch. You can also calculate roof pitch even without using a roof slope calculator.

Rafter rise run this formula is from the pythagorean theorem. Use the following formula which also describes a right triangle. Image 1 12 to 12 12. Pitch rise run 1 5 6 25.

A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. 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. Here are the equations you may use to solve for the length of the slope and the rafter.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Use our calculator to convert the roof angle to pitch if using an angle finder. Recalculate this value into an angle. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

Calculate the roof pitch as the proportion of rise and run. How to measure roof pitch.