Calculate rafter length, roof pitch angle, ridge height, overhang, plumb cut, and bird's mouth seat cut — with a live cross-section diagram.
Enter span, pitch, and overhang to compute all rafter measurements
Full width wall-to-wall
Labeled rise, run, span, overhang, and pitch angle
Total Rafter Length
Pitch Angle
Ridge Height (Rise)
Plumb Cut
Seat Cut (Bird's Mouth)
Slope Factor
| Pitch | Angle | Slope Factor | Category | Typical Use |
|---|