Roof Pitch Conversion

Roof online staff last updated july 10 2020 the following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

Roof pitch conversion. If you can give them the exact chart and measurement that you like the look of they can work to those specifications. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Horizontal measurement 2d measurement is typical when a pitched roof is measured from ground level blueprint or aerial photograph. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

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. Sloped roof pitch conversion correct horizontally measured roof area to its actual pitched area where pitch is defined as rise over run. 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.

You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12.