Board Foot Calculator
Calculate board feet for lumber using thickness, width, and length. Supports quantity and optional price per board foot.
Formula
Board feet = thickness (in) × width (in) × length (ft) ÷ 12.
Assumptions
- Thickness and width are in inches; length can be in feet or inches.
Limitations
- Does not apply species-specific grading or moisture corrections.
Worked example
1 in × 6 in × 8 ft board
Board feet = (1 × 6 × 8) ÷ 12 = 4 board feet.
Frequently asked questions
What is the difference between nominal and actual lumber dimensions?
Nominal sizes (e.g., 2×4) are traditional names; actual dimensions are smaller after planing. Board-foot calculations use the dimensions you enter.
Last reviewed: 2026-07-22
Category: Construction & Materials
Results are provided for informational purposes only and may not reflect real-world policies, fees, or individual circumstances.