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Calculate board feet of lumber from thickness, width and length, for one board or many, and the total price.
How many board feet?
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Board foot calculator: what it is for
Enter the thickness and width in inches, the length in feet and how many boards you need. The calculator gives board feet per board, the total and the price at your cost per board foot. Quarter sizes like 4/4 and 8/4 are accepted as thickness.
How to use
- Enter thickness and width in inches.
- Enter the length in feet and quantity.
- Add the price per board foot.
When to use it
- Buying hardwood for furniture.
- Estimating lumber for a deck or shelf.
- Comparing lumber prices.
Frequently asked questions
What is a board foot?
A volume of wood 1 inch thick, 12 inches wide and 12 inches long (144 cubic inches). Hardwood is usually priced by the board foot.
What is the formula?
Board feet = thickness (in) × width (in) × length (ft) ÷ 12. A 2×6 that is 8 feet long is 2 × 6 × 8 ÷ 12 = 8 board feet.
Nominal or actual size?
Lumber is sold by nominal size (a 2×4 is really 1.5 × 3.5 inches), and board feet are usually figured on the nominal size. Rough hardwood uses quarters: 4/4 is 1 inch, 8/4 is 2 inches.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.