Board Feet Formula:
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Board feet is a measurement of lumber volume. One board foot equals 144 cubic inches, which is equivalent to a piece of wood 1 inch thick, 12 inches wide, and 12 inches long. It's the standard unit for buying and selling lumber in North America.
The calculator uses the board feet formula:
Where:
Explanation: The formula calculates the volume of lumber in board feet by multiplying the three dimensions and dividing by 12 to convert to the standard board foot measurement.
Details: Accurate board feet calculation is essential for lumber pricing, project planning, material estimation, and cost control in woodworking and construction projects.
Tips: Enter thickness and width in inches, length in feet. All values must be positive numbers. The calculator will provide the result in board feet (BF).
Q1: Why divide by 12 in the formula?
A: We divide by 12 because one board foot equals 144 cubic inches (12 inches × 12 inches), and we're working with length in feet rather than inches.
Q2: How accurate is board feet calculation?
A: The calculation is mathematically precise, but actual lumber dimensions may vary slightly due to milling processes and wood shrinkage.
Q3: Does this work for metric measurements?
A: This calculator uses imperial measurements. For metric, you would need to convert to board feet using appropriate conversion factors.
Q4: How is board feet different from linear feet?
A: Board feet measures volume, while linear feet measures length. Board feet accounts for all three dimensions of the lumber.
Q5: Can I calculate board feet for multiple pieces?
A: Yes, simply calculate the board feet for one piece and multiply by the number of identical pieces needed.