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Calculating Board Feet
How to Calculate Board Feet
Hardwood lumber in the United States and Canada is measured by volume, specifically by the cubic inch. A board foot of lumber is the volume of one foot in length and one foot wide and one inch thick. If you measured the volume within that board foot you would fine 144 cubic inches.
Here’s the formula and some examples:
Thickness x Width x Length (in inches) / 144
If you buy planed wood there are some things to keep in mind. Board feet will refer to the nominal dimensions of the board (or what the actual dimensions were before any planing was done to the board). That’s why when you go to buy a 2 x 4 at the home improvement mega store it actually measures 1 ½ x 3 ½.
© Woodworkers Resource 2007