/// Answer-first planning notes
How many board feet are represented by my lumber dimensions?
| Planning input | Calculation role | Project check |
|---|---|---|
| Thickness and width | Set cross-sectional lumber volume | Match seller pricing dimensions |
| Length and quantity | Scale volume across pieces | Group identical sizes only |
| Allowance | Adds explicit defect or cutting volume | Plan actual cuts separately |
One board foot is the volume of a board one inch thick, twelve inches wide, and one foot long.
Evidence: USDA Forest Service, Pacific Northwest Research Station/// Formula & field notes
How this board foot estimate works
FormulaBoard feet = thickness in inches × width in inches × length in feet ÷ 12 × quantity × (1 + waste %).
Worked example
Ten pieces measuring 2 in × 6 in × 8 ft contain 80 board feet before any defect or cutting allowance.
/// Source trail
Data & assumptions
Every source has a declared scope. A reference can support a conversion or product assumption without turning this estimate into a supplier quote.
Exact international-foot to meter conversion; U.S. survey-foot conversion is explicitly outside this claim.
Independent confirmation that one international foot equals exactly 0.3048 meters; U.S. survey-foot conversion remains distinct.
Nominal board-foot definition for lumber; log-scale recovery conversions are outside this claim.
Independent nominal board-foot definition for lumber; empirical log-scale conversion factors are excluded.
/// Common questions
Board Foot calculator FAQ
What should I verify before ordering lumber?
Confirm field dimensions and actual versus nominal dimensions and seller pricing basis against the exact product or supplier information. ProjectQty shows the assumptions so you can replace planning defaults before ordering board feet.
How does waste affect the lumber estimate?
Waste is applied after the base geometry is calculated and before discrete packages or pieces are rounded up. Use a higher allowance for complex layouts, cuts, pattern matching, breakage, or uncertain field dimensions.
Is this lumber result a professional design?
No. It is a quantity-planning result. Species, grade, moisture, preservative treatment, span, connections, and structural suitability require the project specification.