Roof Slope Conversion Table

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Roof slope conversion table.

Roof pitch on the form x 12 can be expressed in grades as. Finding the best roof slope conversion chart. Roof pitch is the slope created by the rafter. Then you ll be able to measure slope from an unfinished attic space under the 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. 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. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. To obtain an accurate roof pitch measurement properly measure the rise and run.

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. 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. Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as. S grade 1 m 2 m 50 slope and roof pitch.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. The combination of two numbers are used to display or show the roof pitch.