Roof Slope Conversion Chart

Rafter rise run this formula is from the pythagorean theorem.

Roof slope conversion chart.

Approximately 8 9 16 in 12. It s very inexpensive and very accurate. You can also calculate roof pitch even without using a roof slope calculator. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Rise run rise run slope. To obtain an accurate roof pitch measurement properly measure the rise and run. Given that roofs are normally spotted from a distance long before any windows and doors they will be a large determining factor as to what someone will think of when they look at your property. Giving you a slope of 8 556 in 12 or.

Then you ll be able to measure slope from an unfinished attic space under the roof. For many home owners the roof is a hugely important feature of the home and is the key section of the home which is seen from the exterior. 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. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level.

If you re not sure what the slope of your roof is and you want to determine that in either degrees or rise in run we recommend this slope finder on amazon. Use the following formula which also describes a right triangle. 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. 0 713 x 12 8 556.