Construction & ContractorsBoard Feet Engine
Lumber Cost Calculator
Calculate board feet (BF = T × W × L / 12), linear footage, piece counts, and pricing for framing dimensional lumber and hardwoods.
Calculation Results
Board Foot Calculation Formula
Board Feet (BF) = (Thickness in × Width in × Length ft) / 12 × Piece Count- Board Foot Standard: 1 board foot equals the volume of a 1-inch thick by 12-inch wide by 1-foot long board (144 cubic inches).
- Example: A 2x4 that is 8 ft long = (2 × 4 × 8) / 12 = 5.33 board feet.
- Linear Feet: Total cumulative end-to-end length (Piece Count × Length in Feet).
Step-by-Step Worked Example
Scenario: Ordering 60 pieces of 2x6 framing lumber that are 16 feet long at $2.20 per board foot
Calculation Steps:
- Board Feet per Piece = (2 × 6 × 16) / 12 = 16.00 BF
- Total Board Feet = 16.00 BF × 60 pieces = 960.00 BF
- Total Linear Feet = 16 ft × 60 = 960 linear ft
- Total Lumber Cost = 960 BF × $2.20 = $2,112.00
- Effective Cost per Piece = $2,112 / 60 = $35.20 / piece
Result: The order equals 960 board feet costing $2,112.00 ($35.20 per 2x6-16 board).
How to Use This Calculator
- 1Enter nominal board thickness and width in inches, and board length in feet.
- 2Input the quantity of boards to determine total board footage and costs.
Assumptions & Limitations
- Estimates are based on standard national averages and current prevailing construction materials and contractor rates.
- Actual trade bids may fluctuate according to local building code requirements, permit fees, and site topography.
- Always obtain multiple written bids from licensed, bonded, and insured contractors before commencing work.
Frequently Asked Questions
Are nominal dimensions used to calculate board feet?
Yes. Commercial lumber yards and mills calculate board feet using nominal dimensions (e.g. 2x4) rather than surfaced actual dimensions (1.5x3.5).
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