Embed
Embed the Birdsmouth Cut Calculator
Three quick steps — customize the look, choose how it behaves, then copy the code onto your site.
Already have an account? Sign in
Live preview
in
0.5 in24 in
deg
1 deg80 deg
Heel Cut Depth
2.021
Depth of the notch cut into the rafter where it sits on the wall plate.
Plumb Cut Angle
30.0
Angle of the vertical plumb cut, equal to the roof pitch angle.
Level Cut Angle
60.0
Angle of the horizontal seat cut, the complement of the pitch angle.
Share result
Reload calculator
Clear inputs
Found this calculator useful?