Degrees to roof pitch rise in run to see a table.
Roof slope degree.
Most roof s have a pitch in the 4 12 to 9 12 range.
The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.
The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
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.
Roof slope expressed as rise.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
See below after the table for directions on how to convert any roof slope from one form to another even roof slopes not shown in the table.
Either way let s see how you can calculate the slope of a roof without using a roof slope calculator.
Last updated july 10 2020.
Sangle tan 1 1 m 2 m 26 6.
Roof pitches exceeding the level of 9 12 or approximately 37 degrees are termed steep slope roofs.
The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.
To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference.
Access one of the rafters then take the measurement this way.
The 45 degree roofs seen on a frame houses are 12 in 12 but roofs can be even steeper consider the mansard roofs introduced by french second empire architects in the middle of the 1800s.
These are utilized in residential applications.
Measuring the slope from the rafters.
Example slope as angle.
Roof pitch is a measurement of a roof s slope expressed as a ratio.
Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building.
Pitched roofs begin with with slopes greater than 3 in 12.
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.
Slope as angle for an elevation of 1 m over a distance of 2 m can be calculated as.
An example for a steep sloped roof is 8 12.
Mansard roofs with nearly vertical faces can boast a pitch of 20 in 12.
It s just a little math.
Some of the most common roof pitch types are conventional slope type roofs designed with pitch ranging from 4 12 to 9 12.
This means that the rise of the slope goes up or down 8 inches for every 12 inches.
