Board Foot Formula:
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A board foot is a unit of measurement for the volume of lumber. One board foot equals 144 cubic inches (12" × 12" × 1"), or 1/12 of a cubic foot. It's the standard measurement used in the lumber industry in North America.
The calculator uses the board foot formula:
Where:
Explanation: The formula calculates the volume of lumber by multiplying all three dimensions, then divides by 12 to convert to board feet (since 1 board foot = 144 cubic inches).
Details: Accurate board foot calculation is essential for lumber pricing, project planning, and material estimation in woodworking and construction projects.
Tips: Enter length in feet, width and thickness in inches. All values must be positive numbers. The calculator will compute the total board feet.
Q1: Why is length in feet but width/thickness in inches?
A: This is the industry standard for board foot calculations in North America, where lumber is typically sold by length in feet but measured in inches for width and thickness.
Q2: How do I calculate board feet for multiple pieces?
A: Calculate board feet for one piece, then multiply by the number of identical pieces. Alternatively, sum the total length before calculating.
Q3: What's the difference between board feet and linear feet?
A: Board feet measures volume (including width and thickness), while linear feet only measures length regardless of dimensions.
Q4: How accurate are board foot calculations?
A: They're mathematically precise, but actual lumber dimensions may vary slightly due to milling processes and moisture content.
Q5: Do I need to account for wood shrinkage?
A: For precise projects, you may want to add 5-10% extra to account for potential shrinkage, waste, and errors.