Formula For Working Out Roof Pitch

Roof pitch formula image 1 12 to 12 12 roof pitch 7 12 pitch this is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations.

Formula for working out roof pitch. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. For a roof with the ridge above one wall the span is the same as the run. 48 10 4 8. Here are the equations you may use to solve for the length of the slope and the rafter.

Use the following formula which also describes a right triangle. Let s say it is equal to 1 5 m. The calculator above can handle much of this math. You can also calculate roof pitch even without using a roof slope calculator.

For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Measure the rise of your roof. Calculate the rafter length substituting these values into the following formula. Naturally this does not go down particularly well without the right tools knowledge and assistance.

Divide the slope by two to get the pitch. The pitch of this roof is 4 8 12. Rafter rise run this formula is from the pythagorean theorem. Now divide the rise by the multiplier to get the pitch eg.

For many people working out the roof pitch angles can be a bit of a nightmare especially if you are going to do it yourself and try to manage it all on your own. The slope is the same as the pitch.