10/12 Roof Pitch Calculator
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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: "10 12 Pitch" typically refers to a slope or pitch of the roof, where 10 inches of rise occurs over 12 inches of run.
10/12 roof pitch multiplier is 1.6667
10/12 pitch roof angle is 39.81 degrees