Board Foot Calculator

What is the Board Foot Calculator?

Calculate board feet of lumber and its cost. Hardwood is sold by the board foot, a volume unit, so this calculation is needed to compare lumber prices and estimate project costs.

How to use the Board Foot Calculator

1. Enter your thickness, your width, your length, your pieces and the remaining fields.
2. Results update automatically as you type; you can also press Calculate.
3. Read the output: board feet, total cost.
4. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

Worked example

With thickness = 2 in, width = 6 in, length = 8 ft, pieces = 10, price per board foot = $4, the Board Foot Calculator returns board feet: 80.00; total cost: $320.00.

Where the Board Foot Calculator helps in real life

You need oak for a tabletop and the yard prices it per board foot. Entering thickness, width and length for each board gives the total volume and cost before you load the truck.

Two suppliers quote differently — one per linear foot, one per board foot. Converting both to board feet shows which is cheaper.

Common mistakes to avoid

• Using actual dimensions when the yard prices nominal sizes, or the reverse.
• Mixing inches and feet in the length field.
• Forgetting extra for defects, knots and offcuts.
• Pricing surfaced lumber at rough-sawn rates.

💡 Practical tip: Thick boards add up fast — a 2-inch board has twice the board feet of a 1-inch board of the same size.

Tips for better results

• Add 15–20% extra for waste on furniture projects.
• Ask whether the price is for rough or surfaced boards.
• Keep a cut list so you buy the right lengths.

⚠️ Material estimates are approximate. Follow local building codes and manufacturer instructions.

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