Board Foot Calculator
Find the board feet in lumber from its thickness, width and length, with the count and cost.
Change the values and press Calculate to work out your own figures.
Enter the board's thickness, width and length and how many.
Show the working
- board feet = thickness × width × length (in) ÷ 144
How to use it
Enter the board's thickness, width and length and how many.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
board feet = thickness (in) × width (in) × length (in) ÷ 144
Nominal
Hardwood is sold by nominal (rough) thickness: 4/4 is 1 in, 8/4 is 2 in. Softwood dimensional lumber is usually priced by the piece.
Questions
How many board feet is a 2 × 4 × 8?
5.33 board feet.
Formulas
board feet = thickness (in) × width (in) × length (in) ÷ 144
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.