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Board Feet to Cubic Feet Calculator

Convert timber board feet into cubic feet for volume, shipping and metric comparison.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax

Timber volume

8.33 cu ft

High confidence

1 board foot = 144 cu in = 1/12 cu ft exactly. Board footage uses nominal sizes — a 2x4 is billed as 2x4 and delivered at about 1½ x 3½.

Conversion factor applied
0.08 cu ft per bd ft

Board footage is the timber trade's volume unit, and converting it to cubic feet is a straightforward division by twelve. What matters far more than the arithmetic is what the measure counts. Board footage is calculated on nominal dimensions, so a two-by-four is priced as two inches by four even though the dressed piece is nearer one and a half by three and a half. That gap is not an error but a long-standing convention, and it means the volume you pay for exceeds the timber you receive by roughly a quarter. Comparing an imperial board-foot quantity against metric timber quoted at actual size therefore flatters the imperial figure considerably.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • 1 board foot = 144 cubic inches = 1/12 cubic foot
  • Board footage is calculated on NOMINAL dimensions, not the actual dressed size

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Frequently asked questions

Is board footage based on actual or nominal size?
Nominal, which is the crucial point. A 2x4 is priced as though it were two inches by four, while the dressed piece measures about 1½ by 3½. You are billed on the nominal volume and you receive rather less actual timber.
Does board footage apply to sheet goods?
Not usually. Plywood and panel products are sold by the sheet or by square footage, since their thickness is standard and area is what matters. Board footage belongs to dimensional and rough-sawn timber.
How do I compare against metric timber?
Convert to cubic feet and then to cubic metres, remembering that metric timber is usually quoted at actual dimensions. Comparing a nominal imperial volume against an actual metric one overstates what the imperial timber contains.