How to Calculate Board Feet
What is Board Feet?
Board Feet Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
Formula
Board Feet = (Thickness × Width × Length) / 144 (inches) or /12 (if mixed)
Step-by-Step Guide
- 1Enter lumber dimensions in inches, calculate board feet
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
Worked Examples
Input
2 × 6 × 12 lumber
Result
BF = (2 × 6 × 144)/144 = 12 board feet
Common Mistakes to Avoid
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
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