Roof Pitch Conversion

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

Roof pitch conversion.

The charts are there to provide people with an idea of what the actual slope will. 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. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. To do this simply convert the rise and run as a fraction to a decimal form eg.

First convert the pitch to a slope. If you can give them the exact chart and measurement that you like the look of they can work to those specifications. Rise run rise run slope. Roof pitch conversion charts are very useful for one thing they give you all the information that you need to provide to the professionals.

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. 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 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.