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Lumber Board Feet & Cost

Calculate lumber volume in board feet from board dimensions and count, then multiply by a supplied price per board foot.

Calculator inputs

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Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Four boards measuring 2 in × 6 in × 8 ft contain 32 board feet. At 5 currency units per board foot, total cost is 160.

Board feet = thickness(in) × width(in) × length(ft) × boards / 12; cost = board feet × price per board foot

Enter these known values and leave the other values blank.

One board foot is a volume of 144 cubic inches. All boards in one calculation share the entered dimensions.
Use the actual dimensions for physical volume, or the supplier’s stated tally dimensions when reproducing an invoice. Nominal and dressed lumber dimensions differ.
Board count must be a positive whole number. Dimensions must be positive; a zero price is allowed. Waste, defects, kerf, taxes and delivery are excluded.
Use the same currency for comparable inputs. Currency selectors use the captured October 7, 2026 exchange-rate snapshot, not current market rates.

Calculate each size group separately and add the board-foot totals. Do not multiply a mixed group by one board’s dimensions.

Bookify requires a whole board count and allows zero prices while preserving board-foot volume and cost equations.