Formula For Finding Pitch Of A Roof

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.

Formula for finding pitch of a roof.

However if you have a more complex roof you may need to calculate pitch section by section. 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. Divide the first part of the ratio by 12 to work out the pitch. See the chart below for some examples of common roof pitches.

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. This would yield 1 3 next square your result. Roof pitch degree table.

For example if your roof s pitch is 4 in 12 you would divide 4 by 12. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Once you have your roof s pitch divide the number by 12.

Visually where and what values can be seen in the drawing of the calculator which is under the form of calculation. For more on calculating roof pitch and understanding how pitch and slope are different read on. Here s an easy safe way to determine the pitch from inside your attic. Includes result for hip valley factor slope factor and the roof slope in degrees.

A 12 12 pitch roof has a pitch angle of 45. First measure 12 inches from one end of the level and make a mark. 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. Roof pitch calculator results explained.

Check your results with the omni roof pitch calculator. Roof pitch angle calculator briefly about the calculation. Measure from the roof. To convert between american roofing ratios and pitch degrees follow these steps.

Finding the pitch of a roof can be done by finding the rise and run or converted from the angle if it is known. Find the inverse tangent of the pitch to find the angle in degrees. Angle the angle of a roof is the same as the roof s slope except instead of being. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. You ll need a level that is 12 or longer. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.