Free tool
Board foot calculator
Board feet and cost for lumber from thickness, width, length, and quantity.
Inputs
Estimated materials
- Board feet
- 120 BF
- Per piece
- 12 BF
- Total cost
- —
Board feet = thickness (in) × width (in) × length (ft) ÷ 12. Hardwood is usually sold on nominal (rough) thickness, e.g. 4/4 = 1". Estimate — verify before ordering.
Frequently asked
- How do you calculate board feet?
- Multiply thickness in inches by width in inches by length in feet, then divide by 12. A 2×6 that's 12 ft long is 12 board feet.
- Do I use nominal or actual dimensions?
- Hardwood lumber is priced on nominal rough thickness (4/4, 8/4). Use whatever your supplier prices by — most yards quote nominal.
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