1" x 4"
0.33 bd ft
1" x 6"
0.50 bd ft
1" x 8"
0.67 bd ft
1" x 10"
0.83 bd ft
1" x 12"
1.00 bd ft
2" x 4"
0.67 bd ft
2" x 6"
1.00 bd ft
2" x 8"
1.33 bd ft
2" x 10"
1.67 bd ft
2" x 12"
2.00 bd ft

To your right you'll see several common lumber dimensions, and their equivilent board foot dimensions at lengths of 1 foot. If you're using one of these common dimensions, simply multiply the board foot measurement by the length of your board.

Example: You have 10 feet of 1" x 4" lumber, so your board foot measurement would be 0.33 x 10, or 3.30 bd ft.