Bd Ft Calculator
Calculate board feet (bd ft) for lumber based on thickness, width, and length. Useful for woodworking, construction, and estimating lumber volume.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Bd Ft Calculator
- Enter Thickness (in inches) – e.g., 1.5 for 1½″ lumber.
- Enter Width (in inches) – e.g., 5.5 for a 2×6 board.
- Enter Length (in feet) – e.g., 8 for an 8‑foot board.
- Set Quantity (optional, defaults to 1) – number of identical pieces.
- Click “Calculate Bd Ft”.
What the result means: Board feet = (Thickness × Width × Length × Quantity) ÷ 12. The result shows total board feet for all pieces.
Important: All dimensions must be positive numbers. Thickness and width are in inches, length in feet. Use decimals if needed (e.g., 0.75 for ¾″).
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Frequently Asked Questions
A board foot is a unit of volume for lumber, equal to 1 inch thick, 12 inches wide, and 1 foot long (144 cubic inches). It is commonly used to measure and price lumber.
Use the formula: (Thickness in inches × Width in inches × Length in feet) / 12. Multiply by quantity for multiple pieces. Our calculator does this for you.
Yes, as long as you input thickness and width in inches, and length in feet. The calculator works for all standard lumber dimensions.
