Board Foot Calculator
Calculate lumber board feet from inch dimensions and length in feet.
How to Use the Board Foot Calculator
Enter board thickness, width, length and quantity to estimate total board feet of lumber.
Practical Example
A board measuring 1 inch thick, 12 inches wide and 8 feet long equals 8 board feet.
Factors That Affect the Result
Nominal versus actual dimensions, trimming, defects, moisture content and project waste can affect how much lumber you should purchase.
Frequently Asked Questions
What is a board foot?
One board foot is a volume of 144 cubic inches.
Can I calculate multiple boards?
Yes. Enter the quantity to total identical boards.
Should I use actual dimensions?
Use the dimensions that best match the lumber being purchased or measured.
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Board Foot Calculation Notes
A board foot is a lumber volume equal to a board measuring 1 inch thick, 12 inches wide and 12 inches long. Enter thickness, width, length and quantity using the dimensions required by the calculator. Rough-sawn and nominal lumber dimensions can differ from actual finished dimensions, so use the measurement basis that matches your supplier’s pricing. Board-foot estimates are useful for comparing lumber quantities, but cutting waste, defects and grain selection can increase the amount you should purchase.