Board Foot Calculator
Calculate board feet from thickness, width, length, and quantity so you can estimate lumber volume quickly.
Inputs
Tip: Lumber is commonly sold in board feet, where 1 board foot equals a 1-inch thick board that is 12 inches by 12 inches.
Results
Total board feet
40 bf
Each board: 4 bf
Assumptions
- Dimensions are nominal input values in inches and feet.
- Quantity is the number of boards with identical dimensions.
- Board feet are calculated using the standard (T × W × L) / 12 formula.
Example
10 boards at 1 in × 6 in × 8 ft is about 40 board feet total.
FAQ
What is a board foot?
A board foot is a volume measure equal to a 1-inch thick board that is 12 inches by 12 inches.
How do you calculate board feet?
Multiply thickness (in) × width (in) × length (ft), then divide by 12 to get board feet per board.
Why is lumber sold by board foot?
Board feet standardize lumber volume across different sizes so pricing is consistent by material volume.