How To Calculate Board Footage

We sell most of our lumber by the board foot. A board foot is a measure of volume, and a board foot is one square foot, one inch thick.

Board Footage= Thickness (in.) x Width (in.) x Length (feet)
12

Board Footage= Thickness (in.) x Width (in.) x Length (in.)
144

The most common mistake made in calculating board footage is forgetting to multiply by the thickness.

4/4 multiply by 1,  5/4 multiply by 1.25,  6/4 multiply by 1.5
8/4 multiply by 2,  12/4 multiply by 3,  16/4 multiply by 4

Example 1: 4/4 board, 8 inches wide and 8 feet long

(1" x 8" x 8') / 12 =5.33 Bd.Ft.

Example 2: 8/4 board, 7 inches wide and 10 feet long

(2" x 7" x 10') / 12 =11.67 Bd.Ft.

Feet and Inches Calculation

Inches Calculation