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Construction Calculator

Calculate the rafter run by the known rise

Use this free app to calculate the run for any rafter in feet and inches, or just inches. Based on any roof pitch and any known rise.

The run is the horizontal distance a rafter travels. Learn how to perform this necessary task with ease and precision.

Install now:

iOS download

Android download

Calculate rafter run

Open app

Rafter rise calculator
Click on menu in the top left.

 

Select Rafter (known rise)

Menu
Click on Rafter (known rise) the fourth one down.

Rise

Rise
Enter the rise, then click equals.

Pitch

Pitch
Enter how many inches per foot the rafter rises.

Rafter

Click equals one more time to cycle past this one.

Run

Run
This is the horizontal distance the rafter travels.