Roof Pitch Conversion To Degrees

Roof pitch to degrees equivalents this drawing demonstrates how many degrees rise for each pitch of a typical roof.

Roof pitch conversion to degrees.

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. How to convert roof pitch to degrees to find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference. 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.

Hip rafters are different. Rise run rise run slope. Pitch tan angle where angle is the roof pitch expressed in degrees. Enter base length to calculate rise and diagonal for current pitch angle.

To do this simply convert the rise and run as a fraction to a decimal form eg. This is usually expressed with the rise and followed by the run in the imperial measurement system dominated by number 12 which in turn gives a ratio of the total measurement of the incline for every 1 foot or 12 inches of run. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

The roof s pitch is the vertical rise and it is divided into its horizontal run or span known as slope in stair construction and the tangent function in geometry or trigonometry. Roof slope calculator example of use. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length. 8 12 pitch 33 75 degrees.

First convert the pitch to a slope. The chart shows plumb cuts so to get the level cut remember that 90 plumb cut level cut. Convert roof pitch to degrees. If a roof or ramp rises 4 in a length of 12 the pitch is 4 in 12 which is 18 43 or 33 33 grade.

Here is a handy conversion chart to convert roof pitches to degrees in case you don t have time for all that math. The value displayed as the rise will be your x. Roof slope expressed as rise. Roof pitch is described as rise in run typically the rise in a run of 12 units.