Board Foot Calculator
Convert lumber dimensions into board feet — the unit hardwood is actually priced in — for any thickness, width, length, and piece count.
Formula and figures last reviewed by the Cosyslabs team · how we verify
Inputs
Result
Board feet
4.00 BF
Board feet per piece
4.00 BF
- Linear feet
- 8.00 ft
- Pieces
- 1
- Nominal size
- 1.0" × 6.0" × 8.0'
Estimates only. Verify with a licensed contractor or supplier before purchasing. Rough Estimator! is not responsible for shortages, overages, or material variances. See our methodology for formulas and sources.
Formula
BF = (T in × W in × L ft) ÷ 12 · equivalently (T × W × L in) ÷ 144
References
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Frequently asked questions
A board foot is 144 cubic inches of lumber — a piece 1 inch thick, 12 inches wide, and 12 inches long. It is a volume measure, so a 1×12 and a 2×6 of the same length contain the same board footage.
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Cosyslabs. (2026). Board Foot Calculator. Rough Estimator!. https://roughestimator.com/board-foot-calculator
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