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Rafter Length Calculator

Calculate common rafter length, roof angle and ridge height from the building span, roof pitch and overhang.

Result

Length is along the top edge, before cutting the bird’s-mouth and plumb cuts.

Rafter length

14.46ft

In feet and inches
14 ft 5.625 in
Roof angle
26.6°
Ridge height above the walls
6ft
Run
11.938ft
Lumber length to buy
16ft