Roof Pitch Conversion Chart

The combination of two numbers are used to display or show the roof pitch.

Roof pitch conversion chart.

If this isn t practical then perform the same measurement on the underside of the roof. 48 10 4 8. 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. The calculator above can handle much of this math.

Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10. The pitch of this roof is 4 8 12. Usually they come in the form of a roof pitch diagram chart but other times it will be. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Rafter rise run this formula is from the pythagorean theorem. 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. What is a roof pitch chart.

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. We included a roof pitch chart below the 7 12 example image and the calculator below that. Here are the equations you may use to solve for the length of the slope and the rafter.