Roof Slope Conversion Table

Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level.

Roof slope conversion table.

Roof pitch on the form x 12 can be expressed in grades as. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Roof pitch is the slope created by the rafter. Finding the best roof slope conversion chart.

Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Finding the calculations needed to take things a step further with the roof conversion or development is going to take a lot of time and you need to have access to the best charts and software possible.

You can find the roof pitch in the form of x 12 like 4 12 or 9 12. Then you ll be able to measure slope from an unfinished attic space under the roof. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.

Example slope as grade. To obtain an accurate roof pitch measurement properly measure the rise and run.