Board foot calculator
Calculate lumber volume from thickness, width, length and quantity.
How to use Board foot calculator
The Board foot calculator works out lumber volume from thickness and width in inches, length in feet and the number of boards. It multiplies thickness by width by length and divides by 12, then multiplies by the board count. One board foot equals a piece 1 inch thick, 12 inches wide and 1 foot long.
- Enter the requested values in the settings panel.
- Set thickness (inches), width (inches), length (feet), boards.
- Run board foot calculator, review the output, then use the available copy or download controls.
What this tool supports
Calculate lumber volume from thickness, width, length and quantity.
- Thickness (inches)
- Range: 0.001 to 1000000000000
- Width (inches)
- Range: 0.001 to 1000000000000
- Length (feet)
- Range: 0.001 to 1000000000000
- Boards
- Range: 1 to 1000000
Limits and processing
Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.
Frequently asked questions
How do you calculate board feet?
Board feet = thickness (in) × width (in) × length (ft) ÷ 12, times the number of boards. The default of ten 1 by 6 inch boards, 8 feet long, gives 40 board feet.
Should I use nominal or actual lumber dimensions?
The calculator uses whatever numbers you enter. Hardwood is often sold by the board foot on rough, nominal thickness, while surfaced lumber is smaller. Check which measure your lumber supplier uses before comparing prices.
How do I calculate board feet for one board?
Set Boards to 1 and enter its thickness, width and length. A 2-inch-thick, 10-inch-wide board that is 6 feet long is 2 × 10 × 6 ÷ 12 = 10 board feet.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Local bounded calculations. Numeric inputs must be finite and within the visible ranges. Lists and tables have operation-specific limits. Models, estimates and supplied rates must be checked against your intended use.