How To Find Degree Of Slope On Roof

Degrees atan slope.

How to find degree of slope on roof. That page also explains the math that allows you to do the conversions yourself for any slope not listed. The inches box will also accept decimal values making it possible to calculate the degrees for any slope. Locate the level s 12 inch mark. Rise run pitch where pitch is expressed in percent.

Enter any pitch or fraction of pitch to find angle. Use a level against the underside of the rafter you re measuring to get the most accurate value. 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. This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations.

Pitch tan angle where angle is the roof pitch expressed in degrees. To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference. Let s find the angle in degrees for a roof with a 4 in 12 pitch. 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.

To put it in perspective the angle of this slope would be around 30 degrees. Next find the degrees by finding the arc tangent of the slope eg. If you do know the roof slope in degrees then all you have to do is find the secant using a scientific calculator. How do you calculate the slope of a roof.

For a pitch expressed in inches per foot convert to a fraction first eg. Roof slope expressed as rise. How to calculate roof pitch. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.

For the complementary angle reverse the rise and run. Access one of the rafters then take. 4 12 4 12 333. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch.

Simply click in the field inside the box and enter a value for the inches and fraction if necessary. 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. Rafter rise run from the pythagorean theorem. An example for a steep sloped roof is 8 12.

A 4 in 12 pitch becomes 4 12 then divide. This means that the rise of the slope goes up or down 8 inches for every 12 inches.