Board Foot Calculator
How to Measure
When measuring your board:
- Length: Measure along the longest side of the board
- Width: Measure across the board at its widest point
- Thickness: Measure the depth of the board at its thickest point
Always use accurate measurements in inches for the most precise calculations.
How It Works
Input the length, width, and thickness of your board in inches.
Click the calculate button to compute the board feet.
View your result in board feet instantly.
Frequently Asked Questions
What is a board foot?
A board foot is a unit of volume for measuring lumber. One board foot equals the volume of a board that is 1 foot long × 1 foot wide × 1 inch thick (or 144 cubic inches).
How do you calculate board feet?
The basic formula for calculating board feet is:
Board Feet = (Length in feet × Width in inches × Thickness in inches) ÷ 12
For example, if you have a board that is:
- 8 feet long
- 6 inches wide
- 1 inch thick
The calculation would be: (8 × 6 × 1) ÷ 12 = 4 board feet
What common mistakes should I avoid when calculating board feet?
When calculating board feet, avoid these common mistakes:
- Forgetting to divide by 12 in the formula
- Confusing inches and feet measurements
- Not accounting for actual vs. nominal dimensions
- Overlooking the thickness measurement
How accurate is this calculator?
This calculator provides results accurate to two decimal places, ensuring precise measurements for your lumber calculations.
Why do I need to calculate board feet?
Board feet calculations are essential for:
- Accurate lumber purchasing and cost estimation
- Inventory management and tracking
- Project planning and material requirements
- Construction budgeting
How do you measure lumber for board foot calculations?
To measure lumber correctly:
- Measure length in feet
- Measure width in inches
- Measure thickness in inches
- For irregular pieces, measure at the narrowest point
- Always use actual dimensions, not nominal sizes
Do I need to add extra for waste?
Yes, it's recommended to add 10-15% to your calculated board feet to account for:
- Cutting waste
- Possible defects in lumber
- End trimming requirements
- Potential mistakes during construction