Calculate lumber volume and buying quantity from thickness, width, length, count, waste factor, and price per board foot. Built for hardwood shopping and small shop quoting.
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One board foot is a volume equal to 12 inches by 12 inches by 1 inch. Length is entered in feet, so the formula divides by 12.
board feet = thickness in x width in x length ft / 12Waste accounts for milling loss, defects, end checks, grain selection, and layout mistakes.
The Board Foot Calculator applies the canonical formula for this domain using validated reference equations. Inputs are type-checked and unit-normalized before evaluation.
Result = f(input₁, input₂, …)Updated: July 2026
Enter each board size and add a waste factor so you do not run short after milling.
Combine board feet and price per board foot to estimate material cost before labor.
A professional uses the Board Foot Calculator during client work to produce accurate numbers quickly without opening a spreadsheet.
Measure actual thickness and width after milling or use supplier listed dimensions.
Add at least 10% waste for clean stock and more for knots, checks, or grain matching.
Estimate hardwood volume before buying stock. Enter actual board dimensions, count, waste factor, and price to get board feet and material cost.