What is a board foot?

Calculating Board Feet of Lumber        Calculate bdft in logs

Hardwood and Softwood lumber that we use for framing, fencing, cabinetry and furniture is sold by the board foot. This is a measurement that is constant through all thicknesses of lumber, rather than applying to “one-by”, “two-by”, etc.

In the example piece of lumber below, the measurement “A” would be the thickness in inches , measurement “B” the width in inches, and measurement “C” the length in feet .

How to measure a board foot

Thus, the formula for calculating the board feet of lumber in our
example would be;

‘A’ times “B” times “C” divided by 12 or;
For example if the piece if lumber was
3 inches thick (A)
8 inches wide (B)
10 feet long (C), we would have
3 x 8 x 10 divided by 12 = 20 board feet.