Roof Pitch Conversion Chart

Use the following formula which also describes a right triangle.

Roof pitch conversion chart.

Rafter rise run this formula is from the pythagorean theorem. Now divide the rise by the multiplier to get the pitch eg. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

What is a roof pitch chart. The calculator above can handle much of this math. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. We included a roof pitch chart below the 7 12 example image and the calculator below that.

The combination of two numbers are used to display or show the roof pitch. 48 10 4 8. If this isn t practical then perform the same measurement on the underside of the roof. In essence a roof pitch chart is provided as a rough guide usually by a roofing company to help you see what the average roof pitches tend to be.

Here are the equations you may use to solve for the length of the slope and the rafter. These charts come in many various names and forms and we will look at how you can use a roof pitch conversion chart to learn about the most effective balance for your home with regard to getting the roof design right. The pitch of this roof is 4 8 12.