Board Foot Formula:
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Board foot (BF) is a unit of measurement for the volume of lumber. One board foot equals 144 cubic inches (12" × 12" × 1"). It's the standard unit used in North America for buying and selling hardwood lumber.
The calculator uses the board foot formula:
Where:
Explanation: The formula calculates the volume in cubic inches (thickness × width × length×12) and converts it to board feet by dividing by 144 (or equivalently, dividing by 12 after using feet for length).
Details: Accurate board foot calculation is essential for fair lumber pricing, project planning, and material estimation in woodworking and construction.
Tips: Enter thickness and width in inches, length in feet. All values must be positive numbers. The calculator will compute the total board feet.
Q1: How is board foot different from square foot?
A: Board foot measures volume (thickness × width × length) while square foot measures area (width × length only).
Q2: What's the board foot for a 1" × 6" × 8' board?
A: (1 × 6 × 8)/12 = 4 BF. A 1" thick board that's 6" wide and 8' long equals 4 board feet.
Q3: How do you calculate board feet for multiple pieces?
A: Calculate BF for one piece and multiply by the number of identical pieces, or enter total dimensions (e.g., 2" × 4" × 24' for two 2×4×12' pieces).
Q4: Are there standard lumber dimensions?
A: Nominal dimensions (like 2×4) are larger than actual dimensions (1.5" × 3.5"). Always use actual dimensions for accurate calculations.
Q5: How is board foot pricing determined?
A: Price per board foot varies by wood species, grade, and market conditions. Multiply BF by price/BF to get total cost.