- A board foot is a wood measurement for a piece of lumber 12 inches wide by 1 ft long by 1 in thick or 12 in wide by 12 in long by 1 in thick.

- Board foot can be abbreviated as FBM (for "foot, board measure"), BDFT, or BF.

- 1 board foot is also the same as 144 cubic inches.

- In simple terms this is a volume of a rectangular wood divided by 12, thus it would be (length)(width)(thickness)/12.

Where the unit of the length must be in ft and the thickess and width must be in inches.