Formula For Finding Pitch Of A Roof

For more on calculating roof pitch and understanding how pitch and slope are different read on.

Formula for finding pitch of a roof.

The roof pitch angle calculator is used to calculate both the roof slope angle and the missing roof data the projection height length and slope angle of the roof. However if you have a more complex roof you may need to calculate pitch section by section. Roof pitch degree table. Divide the first part of the ratio by 12 to work out the pitch.

Roof pitch calculator results explained. First measure 12 inches from one end of the level and make a mark. 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 this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually.

Includes result for hip valley factor slope factor and the roof slope in degrees. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

A 12 12 pitch roof has a pitch angle of 45. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. Here s an easy safe way to determine the pitch from inside your attic. Measure from the roof.

Find the inverse tangent of the pitch to find the angle in degrees. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Check your results with the omni roof pitch calculator. Marvel at your mathematical.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. If you don t want to do a lot of measuring you can use your pitch calculation to get an estimated square footage of your roof. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. You ll need a level that is 12 or longer.

This would yield 1 3 next square your result. Angle the angle of a roof is the same as the roof s slope except instead of being. To convert between american roofing ratios and pitch degrees follow these steps. Visually where and what values can be seen in the drawing of the calculator which is under the form of calculation.

Image 1 12 to 12 12 roof pitch 7 12 pitch. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. Once you have your roof s pitch divide the number by 12.