🏠 Home & DIY

Board Foot Calculator

Calculate board feet of lumber and its cost.

in
in
ft
$

Results

Board feet
80.00
Total cost
$320.00

📊 Board Foot Calculator chart

How the board feet changes as the pieces varies. The orange dot marks your current value.

What is the Board Foot Calculator?

Calculate board feet of lumber and its cost. Order the right amount the first time. These construction and DIY calculators estimate materials for common home projects and include sensible waste allowances.

Board Foot Calculator – free online home & diy tool illustration
Board Foot Calculator — free, exact and private.

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

Board feet = T (in) × W (in) × L (ft) ÷ 12

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.

Tips for better results

  • Add 5–15% for waste, cuts and breakage depending on the material.
  • Measure twice and round up when buying — returns are easier than second trips.
  • Coverage figures vary by product, so check the label or spec sheet.

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

Frequently asked questions

What does the Board Foot Calculator do?

Calculate board feet of lumber and its cost.

How is it calculated?

The Board Foot Calculator uses this method: Board feet = T (in) × W (in) × L (ft) ÷ 12.

Can you show an 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.

Is the Board Foot Calculator accurate?

It uses standard published formulas and is tested against known values, but results are estimates for guidance. Material estimates are approximate. Follow local building codes and manufacturer instructions.

Is this tool free and private?

Yes — the Board Foot Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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