Board Foot Calculator
Calculate board feet from thickness, width, length, and quantity. Estimate lumber volume and total cost.
Results
- Total board feet
- 40 bd ft
- Board feet per piece
- 4 bd ft
Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.
Calculate board feet from thickness, width, length, and quantity. Estimate lumber volume and total cost.
How to use the board foot calculator
- Enter the thickness in in.
- Enter the width in in.
- Enter the length in ft.
- Enter the number of boards.
- Optionally add a price to estimate the total project cost.
- Read your quantities instantly — no sign-up, and you can print the estimate to take to the supplier.
Worked example
Inputs
- Thickness
- 1 in
- Width
- 6 in
- Length
- 8 ft
- Number of boards
- 10
Results
- Total board feet
- 40 bd ft
- Board feet per piece
- 4 bd ft
Using the example values above, the board foot calculator returns 40 bd ft (total board feet). Change any field to match your own project and the numbers update instantly.
Formula
Board feet = (thickness in × width in × length ft ÷ 12) × quantity.
Frequently asked questions
- What is a board foot?
- A board foot is 144 cubic inches of lumber — for example a 1 in × 12 in × 1 ft board.
- Does board foot use nominal or actual size?
- Use nominal thickness and width (the size before planing) for pricing.
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