What Is A Board Foot?

The board foot or board-foot is a unit of measurement for the volume of lumber in the wood industry. It is the volume of a one-foot length of a board one foot wide and one inch thick. It is also equivalent to one square foot of lumber one inch thick.


Board foot is commonly abbreviated BF.

One board foot equals:


  • 1 foot × 1 foot × 1 inch
  • 12 inch × 12 inch × 1 inch
  • 144 cubic inches
  • 1/12 cubic foot
  • 2360 cubic centimeters

Measuring a board foot