How this calculator works
Board feet = thickness(in) × width(in) × length(ft) × quantity ÷ 12.
Formula
board feet=T(in)×W(in)×L(ft)×q/12Total lumber volume in board feet.
Worked example
Verified example is a verified test case used by the calculation engine.
Assumptions and limitations
- Thickness and width are entered in inches.
- Length is entered in feet.
- The calculation uses the entered dimensions directly and does not apply species, grading, nominal-to-actual dimension or pricing rules.
Methodology & sources
This calculator uses deterministic, versioned calculation logic. The formula and verified examples above are part of the calculation definition used by CalcuMint. Technical calculation version: 1.
- USDA Forest Service — Board foot definition — Defines one board foot as 12 in × 12 in × 1 in, equivalent to the implemented board-foot formula.
Frequently asked questions
What does the calculator return?
It returns total board feet for the entered dimensions and quantity.
Does it convert nominal lumber sizes to actual sizes?
No. The formula uses the dimensions you enter.