Board Foot Calculator
Calculate board feet of lumber from thickness, width, length, and quantity of boards.
Board Foot Lumber Mathematics
Board foot calculator computes board feet of lumber from thickness, width, length, and quantity of boards.
A board foot is a unit of lumber volume equal to a board 1 inch thick, 12 inches wide, and 1 foot long (144 cubic inches). Multiplying a board's dimensions and dividing by 12 converts its actual size into that standard unit.
- 1Enter the board's thickness, width, length, and quantity.
- 2View board feet per board and total board feet for the order.
A single board measures 1 inch thick, 6 inches wide, and 8 feet long.
Frequently Asked Questions (FAQ)
Board feet account for a board's full volume (thickness × width × length), so it fairly prices lumber of different dimensions on the same volume-based basis, unlike pricing by linear foot alone.
A "1-by-6" board is nominally 1"×6", but its actual finished (dressed) dimensions are typically closer to 0.75"×5.5" after milling — for precise board-foot pricing at a lumber yard, confirm whether nominal or actual dimensions are being used.
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