Question

What is the formula to convert the roof pitch to degrees?

Answer

You will need a scientific calculator to make use of the formula or just use the table below. If you have a scientific calculator, the formula is:

 angle of roof = atan(inches of rise/12)

Here are the angles for each inch of rise per foot:

	Rise Angle in Degrees

	 1 4 3/4
	 2 9 1/2
	 3 14
	 4 18 1/2
	 5 22 1/2
	 6 26 1/2
	 7 30 1/4
	 8 33 3/4
	 9 37
	 10 39 3/4
	 11 42 1/2
	 12 45

Dave

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