basic

Lumber Board Feet from Dimensions Calculator

BF = (T_in · W_in · L_ft) / 12, then × number of pieces.

Compute the board-foot quantity of a piece (or stack of identical pieces) of dimensional lumber from its nominal thickness and width (in inches), length (in feet), and number of pieces. 1 board foot = 144 in³ = 1 ft × 1 ft × 1 in. Used universally in US lumber pricing.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

in
in
ft

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BF = T_in · W_in · L_ft / 12 · pieces.

In depth

Compute the board-foot quantity of a piece (or stack of identical pieces) of dimensional lumber from its nominal thickness and width (in inches), length (in feet), and number of pieces. 1 board foot = 144 in³ = 1 ft × 1 ft × 1 in. Used universally in US lumber pricing.