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Home/Calculators/Board Foot Calculator

Board Foot Calculator

Calculate lumber board feet, waste allowance, and project cost by board size. This free board foot calculator is private and needs no signup.

Lumber dimensions

Enter thickness and width in inches, and length in feet.

Board size 1

Line total: 4.00 board feet

Total to purchase

4.40

board feet

Net lumber

4.00 bd ft

Waste added

0.40 bd ft

Formula

Thickness (in) x width (in) x length (ft) / 12 x quantity

About Board Foot Calculator

The Board Foot Calculator is one of Intellure's free tools for estimating rough and hardwood lumber in standard US measurements. Enter the thickness and width in inches, length in feet, and quantity for each board size to calculate total board feet for an entire project. Add a waste allowance for cuts and defects, then enter a price per board foot to estimate your lumber cost in US dollars. This browser-based lumber calculator is useful for woodworkers, cabinetmakers, sawmills, builders, and DIY projects, with no upload, account, or signup. It also shows the board foot formula clearly so you can check an estimate before ordering wood. Intellure's managed AI employee can handle the wider customer work by answering questions, following up with leads, and booking appointments 24/7.

Frequently Asked Questions

How do you calculate board feet?
Multiply thickness in inches by width in inches by length in feet, then divide by 12. Multiply that result by the number of identical boards. For example, one board that is 2 inches thick, 6 inches wide, and 8 feet long contains 8 board feet.
What is a board foot of lumber?
A board foot is a US lumber volume equal to a board 1 inch thick, 12 inches wide, and 1 foot long. It equals 144 cubic inches. It measures volume, not length, so boards with different dimensions can contain the same number of board feet.
Should I use nominal or actual lumber dimensions?
Use the dimensions that match how the seller prices the lumber. Rough hardwood is often priced from its nominal thickness before surfacing, while finished construction lumber has smaller actual dimensions. Check the supplier's measurement and pricing policy before placing an order.
How much extra lumber should I add for waste?
A 10% waste allowance is a practical starting point for straightforward projects. Increase it to 15% or 20% for complex cuts, grain matching, defects, or uncertain plans. Expensive figured wood may require a board-by-board layout before you decide how much extra to buy.
Can Intellure help a lumber or woodworking business follow up with customers?
Yes. This free board foot calculator handles a quick material estimate, while Intellure's managed AI employee can answer customer questions, handle sales and marketing conversations, follow up with quote requests, and book appointments 24/7 across WhatsApp, Instagram, and your website. Flexible monthly plans are built around each business's budget.

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FROM LUMBER LIST TO BOOKED PROJECT

You measured every board. Intellure catches every customer.

Woodworking and lumber customers ask about stock, custom cuts, quotes, and lead times before they buy. Intellure gives your business a managed AI employee on a flexible monthly plan built around your budget that answers customers, handles sales and marketing, follows up with leads, and books consultations 24/7 across WhatsApp, Instagram, and your website.

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