Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Total board feet
40.00
Total lumber cost
$260.00
Board feet per piece
4.000
Cost per piece
$26.00
Total linear feet
80.0
Total cubic inches
5760
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter thickness (in).
- 2Enter width (in).
- 3Enter length (in).
- 4Enter number of pieces.
- 5Enter price per board foot ($).
- 6Read your total board feet on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
A board foot is 144 cubic inches of lumber. Hardwood is priced by the board foot, which is why thickness matters more than face size when you buy.
Worked example
Using the values the calculator loads with:
Inputs
- Thickness: 1 in
- Width: 6 in
- Length: 96 in
- Number of pieces: 10
- Price per board foot: 6.5 $
Results
- Total board feet: 40
- Total lumber cost: $260.00
- Board feet per piece: 4
- Cost per piece: $26.00
- Total linear feet: 80
- Total cubic inches: 5,760
What each field means
Inputs
- Thickness (in)
- The thickness used in the calculation, measured in in. Starts at 1 in so you have a working example on load.
- Width (in)
- The width used in the calculation, measured in in. Starts at 6 in so you have a working example on load.
- Length (in)
- The length used in the calculation, measured in in. Starts at 96 in so you have a working example on load.
- Number of pieces
- The number of pieces used in the calculation. Starts at 10 so you have a working example on load.
- Price per board foot ($)
- The price per board foot used in the calculation, measured in $. Starts at 6.5 $ so you have a working example on load.
Results
- Total board feet
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total lumber cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Board feet per piece
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Cost per piece
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total linear feet
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total cubic inches
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the board foot & lumber cost calculator work?
A board foot is 144 cubic inches of lumber. Hardwood is priced by the board foot, which is why thickness matters more than face size when you buy. The underlying maths is: BF = thickness (in) × width (in) × length (in) ÷ 144.
What do I need to enter?
5 values: thickness, width, length, number of pieces, and price per board foot. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the total board feet result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Board Foot Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/board-foot
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/board-foot" target="_blank" rel="noopener">Board Foot Calculator — RevenueLab</a> (2026).</p>
Source: [Board Foot Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/board-foot) (2026).