Board Feet Formula:
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A board foot is a unit of measurement for lumber volume. One board foot equals 144 cubic inches, typically represented as a piece of wood 12 inches long, 12 inches wide, and 1 inch thick.
The calculator uses the board foot formula:
Where:
Explanation: The formula converts square footage to board feet by accounting for the third dimension (thickness) and standardizing to the board foot unit.
Details: Accurate board foot calculation is essential for lumber pricing, project planning, material estimation, and cost control in woodworking and construction projects.
Tips: Enter the square footage and thickness in inches. Both values must be positive numbers. The calculator will provide the equivalent board footage.
Q1: Why multiply by 12 in the formula?
A: We multiply by 12 to convert square feet to square inches (since 1 sq ft = 144 sq inches, and 1 board foot = 144 cubic inches).
Q2: How do I calculate board feet for multiple pieces?
A: Calculate board feet for one piece using this calculator, then multiply by the number of identical pieces.
Q3: Does width affect board foot calculation?
A: Width is already accounted for in the square footage measurement (length × width = sq ft).
Q4: What's the difference between board feet and linear feet?
A: Board feet measure volume (3D), while linear feet measure length (1D). Board feet account for width and thickness.
Q5: Can I use this for irregular shapes?
A: This calculator is for rectangular lumber. For irregular shapes, you'd need to calculate total cubic inches and divide by 144.