A clear result in a few inputs.
- Enter the requested values.Use consistent units and the real values for your scenario.
- Read the main result and breakdown.NumLuma recalculates immediately when an input changes.
- Check the formula and assumptions.Use the supporting context before making a real-world decision.
What this calculator does
A board foot is a lumber-volume unit equal to a board 1 inch thick, 12 inches wide and 1 foot long. NumLuma applies the standard board-foot formula to the nominal dimensions and quantity you enter.
What to know before you use the result
- Thickness and width are entered in inches while length is entered in feet.
- Board-foot pricing is volume-based and does not by itself account for grade or species.
- Actual dressed dimensions can differ from nominal lumber dimensions.
Common mistakes to avoid
- Entering length in inches when the formula expects feet.
- Using actual dressed dimensions when a supplier prices by nominal board feet without checking their convention.
- Treating board feet as the same thing as linear feet.
Where this calculation is useful
Hardwood buyingLumber pricingWoodworkingMaterial takeoffs
Related concepts
board feetlumber volumenominal lumberwood quantity