Board Feet Calculator
Enter the thickness, width, length and quantity of boards to calculate total board feet.
Board Feet Calculator
Calculate board feet — the standard unit for pricing hardwood lumber — from board dimensions and quantity.
This calculator provides a material estimate for general planning purposes only. Always add a safety margin and confirm quantities with your supplier or contractor before purchasing, since real-world waste, layout and offcuts vary by project.
Board feet is the standard unit hardwood lumber is priced by; this calculator converts a board's thickness, width and length into board feet, then multiplies by quantity for your total order.
Example
- With the default values shown above, this calculator returns: Board Feet per Board ≈ 4.00; Total Board Feet ≈ 40.00.
Frequently Asked Questions
What is the formula?
Board Feet (per board) = (Thickness in inches × Width in inches × Length in feet) ÷ 12.
Why divide by 12?
One board foot is defined as a piece of wood 1 inch thick, 12 inches wide and 1 foot long (144 cubic inches) — dividing by 12 converts your dimensions into that standard unit.