What this calculator does
This tool turns your measurements into a consistent planning estimate you can review before pricing or starting work. It is useful during early takeoffs, option comparisons, and on-site checks where transparent math matters.
How the calculation works
Formula
Board feet = thickness (in) × width (in) × length (ft) × quantity ÷ 12.Worked example
Ten boards measuring 2 in × 6 in × 8 ft equal 80 board feet.
How to measure
- 01Use nominal or actual dimensions consistently for your estimate.
- 02In metric mode, enter thickness and width in mm and length in mm.
Common mistakes to avoid
- Confusing board feet with square feet
- Mixing nominal and actual dimensions
- Forgetting quantity or waste
Limits of this estimate
Board-foot pricing and grading practices differ by supplier. This tool measures volume, not structural capacity.
Frequently asked questions
What is one board foot?
A volume equal to a board 1 inch thick, 12 inches wide, and 1 foot long.
Can metric lumber be converted?
Yes. Metric dimensions are converted internally, and the result remains in board feet.