Rise Over Run Roof Calculator

Enter the rise and run for the pitch length and angle of the rafter.

Rise over run roof calculator.

A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. It is often compared to slope but is not exactly the same. Angle the angle of a roof is the same as the roof s slope except instead of being.

Let s say it is equal to 1 5 m. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Slope percent amount of rise amount of run x 100.

Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. The triangle diagram will be re drawn to scale with all dimensions marked. In roof pitch calculator pitch value can be obtained by dividing n by. To find the percentage of a slope use this slope percent formula.

Roof slope calculator example of use. Drag sliders to animate the results and diagram. The angle percent of a slope with rise of 6 units and run of 10 units is. Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run.

A roof pitch that is based on a fixed rise and run and does not end up with a whole number is known as a bastard pitch. The rise is the distance from the top of the roof to the bottom. Calculate roof pitches with this free and simple online tool. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.

Let s assume it is equal to 6 m. Measure the rise of your roof. Angle percentage 6 10 x 100. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. The run is the distance from the outside of the wall to the inside of the ridge. How do you find the percent of slope using rise over run.

Calculate the rafter length substituting these values into the following formula.