1. A board foot is a lumber measurement equal to a board or plank of wood 1 inch thick and 12 inches on each side. The formula for calculating board feet of sawed lumber is
bd ft = thickness(in) x width(in) x length(ft)/12.
2. One (1) board foot equals 1 inch x 12 inches x 12 inches. One (1) board foot equals 1 inch (thick) x 12 inches (width) x 1 foot (length). One (1) board foot equals 144 cubic inches.