Formula For Finding Pitch Of A Roof

Here s an easy safe way to determine the pitch from inside your attic.

Formula for finding pitch of a roof. 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. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. Once you have your roof s pitch divide the number by 12. Measure from the roof.

Includes result for hip valley factor slope factor and the roof slope 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. First measure 12 inches from one end of the level and make a mark. Angle the angle of a roof is the same as the roof s slope except instead of being.

A 12 12 pitch roof has a pitch angle of 45. To convert between american roofing ratios and pitch degrees follow these steps. 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. Roof pitch calculator results explained.

See the chart below for some examples of common roof pitches. However if you have a more complex roof you may need to calculate pitch section by section. You ll need a level that is 12 or longer. Roof pitch degree table.

Roof pitch angle calculator briefly about the calculation. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Divide the first part of the ratio by 12 to work out the pitch. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

Image 1 12 to 12 12 roof pitch 7 12 pitch. Finding the pitch of a roof can be done by finding the rise and run or converted from the angle if it is known. 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. Find the inverse tangent of the pitch to find the angle in degrees.

Marvel at your mathematical. Check your results with the omni roof pitch calculator. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. For more on calculating roof pitch and understanding how pitch and slope are different read on.

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. Visually where and what values can be seen in the drawing of the calculator which is under the form of calculation. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.