Rise Over Run Roof Calculator

Roof pitch calculator calculate roof pitches with this free and simple online tool.

Rise over run roof calculator.

Enter run and known pitch angle or rise to calculate other dimensions enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch. 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. The triangle diagram will be re drawn to scale with all dimensions marked. As aforementioned there is no standard pitch of a roof.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. 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.

How do you find the percent of slope using rise over run. Roof pitch calculator results explained 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. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10. In roof pitch calculator pitch value can be obtained by dividing n by 12 and divide s by the answer.

Enter the rise and run for the pitch length and angle of the rafter. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values. 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.

The total run is the distance from the peak to the edge of the roof which in this case is the total width divided in half which is equal to 10 feet or 120 inches. The run is the distance from the outside of the wall to the inside of the ridge. Pitch tan angle where angle is the roof pitch expressed in degrees. To find the percentage of a slope use this slope percent formula.

Drag sliders to animate the results and diagram. Outside of the u s a degree angle is typically used. Rise run pitch where pitch is expressed in percent.