Board Foot Formula:
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Board foot is a unit of measurement for lumber volume. One board foot equals 1 foot long × 1 foot wide × 1 inch thick (or equivalent volume). It's the standard measurement used in the lumber industry for buying and selling wood.
The calculator uses the board foot 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 foot 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 valid positive numbers. The calculator will compute the board footage of your lumber.
Q1: Why divide by 12 in the formula?
A: We divide by 12 because one board foot equals 144 cubic inches (12×12×1), and the formula T×W×L gives us cubic inches when L is converted to inches.
Q2: How accurate is board foot 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: What if my lumber has irregular dimensions?
A: For irregular lumber, you may need to calculate based on average dimensions or use more advanced geometric formulas.
Q5: Is board foot the same as linear foot?
A: No, board foot measures volume while linear foot measures length. Board foot accounts for all three dimensions of the lumber.