Name: Fred Who is asking: Other Level of the question: All Question: how many 16 foot 2 by 4's are there in a 1000 board feet of lumber.What is the formula for calculating this. Fred, I went to http://www.woodzone.com/tips/board_feet/board_feet.htm and found the following. Calculating Board Feet BOARD FEET: "Board Feet" is a measurement of lumber volume. A board foot is equal to 144 cubic inches of wood. Actually it's easy to calculate using the following formula: (Thickness x Width x Length) / 144 = Board Feet Note: Lumber is specified by its rough size. This is why a 1"x 4" board is actually 3/4" thick and a 2"x 4" board is actually 1-1/2" thick. When you are figuring up board feet, keep in mind a waste factor. If you purchase good clear material add about 15% for waste, if you elect to use lower grade material you will have to allow for defects and more wasted material -add about 30%. Take a few boards and run the measurements and you will see how easy this works. One 2 by 4, 16 feet long (that is 12 16 = 192 inches long) is Length Thickness Width = 192 1.5 3.5 = 1008 cubic inches. Hence one 16 foot 2 by 4 is 1008/144 = 7 board feet. Thus to have 100 board feet you would need 1000/7 = 143 2 by 4's Penny