Roof Slope Degrees Chart

Calculate the roof pitch as the proportion of rise and run.

Roof slope degrees chart.

The combination of two numbers are used to display or show the roof pitch. Finally you can find the roof pitch in the form of x 12. 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. To obtain an accurate roof pitch measurement properly measure the rise and run.

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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. A ratio of 1 1 62 is known as the golden ratio and therefore the vast majority of roof pitch in degrees charts you see will be working to this ratio at the very least. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Recalculate this value into an angle. Pitch rise run 1 5 6 25.

Then you ll be able to measure slope from an unfinished attic space under the roof. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Angle arctan pitch arctan 0 25 14.