Roof Slope Degrees Chart

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Roof slope degrees chart.

Recalculate this value into an angle. 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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Angle arctan pitch arctan 0 25 14.

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. Then you ll be able to measure slope from an unfinished attic space under the roof. The combination of two numbers are used to display or show the roof pitch. In essence a roof pitch chart is provided as a rough guide usually by a roofing company.

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. To obtain an accurate roof pitch measurement properly measure the rise and run. Calculate the roof pitch as the proportion of rise and run. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.

The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. Finally you can find the roof pitch in the form of x 12.