Lumber Calculator
Calculate board feet, linear feet, and material costs for your woodworking and construction projects.
Result
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Cost Estimate
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Summary
| Total Volume: | - |
| Waste Factor (10%): | - |
| Total with Waste: | - |
Dimensional Lumber Sizes
| Nominal | Actual (in) | Actual (mm) |
|---|---|---|
| 1x2 | 3/4 × 1-1/2 | 19 × 38 |
| 1x4 | 3/4 × 3-1/2 | 19 × 89 |
| 1x6 | 3/4 × 5-1/2 | 19 × 140 |
| 2x4 | 1-1/2 × 3-1/2 | 38 × 89 |
| 2x6 | 1-1/2 × 5-1/2 | 38 × 140 |
| 2x8 | 1-1/2 × 7-1/4 | 38 × 184 |
| 2x10 | 1-1/2 × 9-1/4 | 38 × 235 |
| 2x12 | 1-1/2 × 11-1/4 | 38 × 286 |
Board Foot Formula
Board Feet = (Length × Width × Thickness × Pieces) ÷ 144
Where all measurements are in inches.
Example: 8ft (96in) × 6in × 1.5in = 864 ÷ 144 = 6 board feet
Project Tips
- Add 10-15% waste for cuts and defects
- Always measure actual lumber dimensions
- Consider moisture content for outdoor projects
- Hardwood is priced by board foot
- Softwood is often priced by linear foot
Project Estimation Guide
Decking (per 100 sq ft)
- Deck boards (6" width): ~200 linear ft
- Joists (16" OC): ~75 linear ft
- Beams: ~10 linear ft
- Posts: 4-6 pieces
Flooring (per 100 sq ft)
- Flooring boards: ~110 sq ft (with waste)
- Underlayment: 100 sq ft
- Subfloor: 4 sheets of plywood
Wall Framing (per 100 sq ft)
- Studs (16" OC): ~100 linear ft
- Top/Bottom plates: ~60 linear ft
- Headers: ~20 linear ft