Board Foot Calculator
For metric: Convert cm to inches first (1 cm = 0.393701 inches) then use the same formula.
Easily calculate the board feet of lumber for any woodworking or construction project. Save time, avoid waste, and plan with precision.
What is a Board Foot?
A board foot is a unit of volume used in the lumber industry to measure hardwood and softwood. It represents a piece of wood that is:
- 1 foot long
- 1 foot wide
- 1 inch thick
So, if you’re buying or cutting lumber, calculating board feet helps estimate how much wood you need — and how much it might cost.
Board Foot Formula
The standard formula is:
Board Feet = (Thickness × Width × Length) / 12
Where:
- Thickness is in inches
- Width is in inches
- Length is in feet
You can also use:
Board Feet = (T × W × L) ÷ 144
→ if all dimensions are in inches
🔧 This calculator handles both! Just choose your preferred unit system.
How to Use the Board Foot Calculator
- Select the unit (inches or feet)
- Enter:
- Thickness
- Width
- Length
- Enter the quantity of boards (optional)
- Click Calculate
The calculator instantly shows:
- Total board feet
- Optional: cost estimate (if price per board foot is entered)
Example
You have a board that is:
- 2 inches thick
- 6 inches wide
- 10 feet long
Board Feet = (2 × 6 × 10) / 12 = 10 board feet
Why Use This Calculator?
- Avoid overbuying or underestimating materials
- Simplify budgeting with cost estimation
- Ideal for woodworkers, carpenters, contractors, and DIYers
- Useful for ordering lumber online or at the hardware store
FAQs❓
How many board feet are in a 2×4?
A standard 2×4 that’s 8 feet long has:
(1.5 × 3.5 × 96) ÷ 144 = 3.5 board feet
Can I calculate multiple boards at once?
Yes! Just enter the quantity — the calculator will handle the total.
What’s the difference between board feet and linear feet?
Board feet measure volume; linear feet measure length only.
