Rise Over Run Formula For Roofs

This page offers you the rise and run formula to find the pitch slope angle of the roof of a building.

Rise over run formula for roofs.

Calculate the roof pitch as the proportion of rise and run. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. 12 2 551 in 12. The formula for slope is referred to rise over run because the fraction consists of the rise the change in y going up or down divided by the run the change in x going from left to the right.

Convert roof slope from degrees to rise in run. 6 1 261 in 12. Roof angle in degrees. So a 3 inch rise roof also described as a 3 in 12 roof means that for every 12 or foot of horizontal distance the height of the roof increases by 3.

4 0 839 in 12. 11 2 333 in 12. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. 2 0 419 in 12.

14 2 991 in 12. 9 1 901 in 12. Let s say it is equal to 1 5 m. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values.

In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer. Roof slope as rise in run x in 12 1 0 209 in 12. For example if you measure 4 inches the pitch of your roof is 4 12. 7 1 473 in 12.

The run is the distance from the outside of the wall to the inside of the ridge. 17 3 669 in 12. The diagram shown below illustrates this. Calculate the rafter length substituting these values into the following formula.

Roofers express roof slope as rise or pitch measured in inches of vertical rise per foot of horizontal distance or run. 16 3 441 in 12. Slope measures the angle of change in elevation which can be obtained by dividing rise by run and multiply the result with 100. This will give you the rise over run or pitch.

Pitch rise run 1 5 6 25. 10 2 116 in 12. 13 2 770 in 12. 5 1 050 in 12.

8 1 687 in 12. Measure the rise of your roof. The pitch value can be obtained by dividing n by 12 and divide s by the answer.