Board Foot Calculator
Calculate board feet from lumber thickness, width, length and quantity. Use imperial or metric measurements and optionally estimate total lumber cost.
How to calculate board feet
Board feet are commonly used to measure lumber volume. One board foot represents a piece of wood that is 1 inch thick, 12 inches wide and 1 foot long.
To calculate board feet, multiply the thickness in inches by the width in inches by the length in feet, then divide the result by 12.
If you have multiple identical boards, multiply the board feet for one piece by the quantity.
Example calculation
Thickness: 2 in
Width: 6 in
Length: 10 ft
Quantity: 4
Frequently asked questions
What is one board foot?
One board foot is a lumber volume measurement equal to 144 cubic inches.
Does board foot measure length or volume?
Board foot is a volume measurement, not just a length measurement.
Can I calculate the cost of lumber?
Yes. Enter the price per board foot and the calculator will estimate the total cost.
Can I use metric measurements?
Yes. Switch to Metric mode and enter thickness, width and length in millimeters.