Roof Pitch Conversion To Degrees

Rise run rise run slope.

Roof pitch conversion to degrees.

Enter base length to calculate rise and diagonal for current pitch angle. Roof slope expressed as rise. To do this simply convert the rise and run as a fraction to a decimal form eg. 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. 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. Pitch tan angle where angle is the roof pitch expressed in degrees. Roof pitch is described as rise in run typically the rise in a run of 12 units.

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. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. The value displayed as the rise will be your x. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.

Look at the column labeled pitch then look under degrees to get the corresponding amount of degrees. 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. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference. When determining the angle of a hip use 16 97 instead of 12 in the formula above.

Here is a handy conversion chart to convert roof pitches to degrees in case you don t have time for all that math. Roof pitch to degrees equivalents this drawing demonstrates how many degrees rise for each pitch of a typical roof. Roof pitch and corresponding angles. 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. 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.