Now divide the rise by the multiplier to get the pitch eg.
Roof pitch conversion 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.
48 10 4 8.
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.
What is a roof pitch chart.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Use the following formula which also describes a right triangle.
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.
The calculator above can handle much of this math.
The combination of two numbers are used to display or show the roof pitch.
You can also calculate roof pitch even without using a roof slope calculator.
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.
Usually they come in the form of a roof pitch diagram chart but other times it will be.
If this isn t practical then perform the same measurement on the underside of the roof.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.