Calculate the volume of lumber in board feet (FBM) for woodworking and construction.
A board foot is a unit of volume for timber equal to 144 cubic inches, notionally twelve inches by twelve inches by one inch.
Formula: (Thickness (in) × Width (in) × Length (ft)) / 12
Example: A 2x4 that is 8 feet long = (2 × 4 × 8) / 12 = 5.33 board feet.