A unit for measuring lumber volume equal to a 1-foot square piece of wood that is 1 inch thick.
A board foot is a unit of measure for lumber equal to the volume of a piece of wood one foot long, one foot wide, and one inch thick—equivalent to 144 cubic inches. Lumber is priced and sold by the board foot, and estimators use board feet to quantify and price rough lumber for framing, formwork, and millwork. To calculate board feet: (thickness in inches × width in inches × length in feet) ÷ 12.
A 2×6 stud 8 feet long contains 8 board feet (2 inches × 6 inches × 8 feet ÷ 12 = 8 BF).
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