Calculate board feet of lumber from thickness, width, length, and quantity of boards.
The Board Feet Calculator converts the dimensions of lumber into board feet, the standard unit used for pricing and ordering wood in the US.
One board foot equals a piece of wood 1 inch thick, 12 inches wide, and 12 inches long (144 cubic inches).
Board Feet = (Thickness × Width × Length) ÷ 12, where thickness and width are in inches and length is in feet. Multiply by quantity for the total.
A board 1 in thick, 6 in wide, and 8 ft long is 4 board feet. Ten such boards total 40 board feet.
It's a unit of lumber volume equal to a piece of wood 12 inches x 12 inches x 1 inch thick (144 cubic inches).
Board feet = (thickness in inches x width in inches x length in inches) divided by 144.
Board feet account for thickness and width as well as length, giving a true volume-based price that's fair regardless of the board's dimensions.