Volume of Board Feet per Log = (D-4)2 x (L/16)
D = Diameter inside bark at the small end (inches)
L = Log length (feet)
Diagram shows the number of 1-inch boards that can be cut from a specific log.
T = Nominal thickness (inches)
W= Nominal width (inches)
L = Length (feet)
Board Feet = T x W x L/12