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Lumber Board Feet Estimate
113.33 BF across 2 board types
Generated
7/8/2026
Total board feet
113.33 BF
Across 2 board types.
Lumber stack visualization (relative cross-sections)
10 × 2″ × 4″ × 8ft = 53.33 BF
5 × 2″ × 6″ × 12ft = 60.00 BF
Cross-sections drawn to scale (max width = 6″, max thickness = 2″). Lengths abbreviated.
Step-by-step calculation
Formula
Board feet = (thickness × width × length) ÷ 12, where thickness and width are in NOMINAL inches and length is in feet. Quantity multiplies through.
- 11 board foot = a piece 1 inch thick × 12 inches wide × 1 foot long = 144 cubic inches.
- 2Use NOMINAL dimensions (a '2×4' is sized as 2 × 4, NOT the actual 1.5 × 3.5).
- 310 × (2″ × 4″ × 8ft) ÷ 12 = 5.333 × 10 = 53.33 BF
- 45 × (2″ × 6″ × 12ft) ÷ 12 = 12.000 × 5 = 60.00 BF
- 5Total: 113.33 board feet.
Why nominal vs actual? A "2×4" piece of dimensional lumber is actually 1½" × 3½" after planing and drying. Lumber yards charge by NOMINAL board feet (the original rough-sawn dimensions), so always calculate with the nominal numbers (2 × 4, not 1.5 × 3.5).