By definition, one board foot of lumber is one square foot that is one inch thick. If you would like to convert regular volume units into board feet, use the following relation:

1 board foot = 144 cubic inches = 1/12 cubic foot

How to calculate board feet?

Surprisingly, the calculations are extremely easy! All you need to do is use the board foot formula below:

board feet = length(ft) * width(in) * thickness(in) / 12

Pay special attention to the units! The length of the wooden board should be expressed in feet, while the width and thickness - in inches.

Board Foot Calc