Explicit worked value
How many board feet are in a 2×4×8?
Using 2 inches × 4 inches × 8 feet as the entered dimensions gives 5.333 board feet. A finished board measured smaller will produce a different result.
Calculation from the stated numbers
The imperial formula is thickness in inches × width in inches × length in feet ÷ 12. For 2 × 4 × 8, the result is 64 ÷ 12, or 5.333 board feet when displayed to three decimals.
Why a measured board may differ
The trade label 2×4 does not always equal a measured 2 inches by 4 inches. If the quote is based on finished dimensions, enter those measurements and select Actual or Supplier rather than relying on the nominal example.
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