How to calculate the rise for rafters

Calculate the rise for rafters with any run and any pitch using feet and inches, inches or just a decimal value with ease and precision for free.

It is often necessary to establish the the rise for a particular run and roof pitch. This is so important for ridge posts and knee walls. Build your skills with this technique so this task will become second nature.

Install now:

iOS download

Android download

Rise of rafter

Open app

Rise calculator

Click on menu in the top left.

Select Lean to rafter

Rise calculator menu

Click on Lean to rafter the third one down.



Enter the horizontal distance, then click equals.



Enter the roof pitch in inches per foot, then click equals.


Click equals one more time.



This is the vertical distance.