How to Calculate 12/12 Pitch Rafter Length

To calculate the rafter length, input either the Run or the Rise into the calculator and click calculate. The system will automatically compute the rafter length for you.

Note: "12 12 Pitch" refers to a perfect slope where the rise is equal to the run, giving a 45° angle.

12/12 Roof Pitch Multiplier

12/12 roof pitch multiplier is 2.0000

12/12 Pitch Roof Angle

12/12 pitch roof angle is 45 degrees

12/12 Roof Pitch Template