Board Foot Calculator
This calculator helps you calculate the total board feet of lumber based on thickness, width, length, and quantity. Download a copy of our free board foot calculator and use it on the go today!
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Frequently asked questions
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What is a board foot?
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A board foot is a unit of volume used to measure lumber. It measures volume — not surface area — which is why both width and thickness are required in the calculation.
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How does the calculator determine total board feet?
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The calculator uses the standard industry formula:
Board feet = (Number of Pieces x Length x Width x Thickness)/12
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What are the total board feet and the cost per board foot? (with example)
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If I have 2 pieces of lumber, each measuring 8 feet long, 4 inches wide, and 2 inches thick, and the total cost is $65.
Step 1: Calculate Total Board Feet
Use the standard board foot formula:
Board Feet = ( Number of Pieces x Length x Width x Thickness) / 12
= ( 2x 8 x 4 x 2) / 12
= 10.67 Board Feet
Step 2: Calculate Cost per Board Foot
Cost per Board Foot = Total Cost / Total Board Feet
= 65 / 10.67 -6.09
Total Board Feet: 10.67
Cost per Board Foot: $6.09
