Nominal to Actual Lumber Size
Reference common nominal lumber sizes and their actual surfaced dimensions for layout and estimating.
2 × 3 nominal =
1.5 in × 2.5 in
Representative value from the Nominal to Actual Lumber Size reference table.
Predefined Value Pages
This conversion has 21 predefined value pages for programmatic SEO coverage.
Nominal to Actual Lumber Size Lookup
Select a nominal board size to see the corresponding actual surfaced dimensions.
Actual Dimension Result
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Reference Table
Use this complete table for quick lookup and internal linking to specific value pages.
| Nominal Size | Actual Size | Actual Area (in²) | Area Reduction |
|---|---|---|---|
| 1 × 2 nominal | 0.75 in × 1.5 in | 1.125 | 43.75% |
| 1 × 3 nominal | 0.75 in × 2.5 in | 1.875 | 37.5% |
| 1 × 4 nominal | 0.75 in × 3.5 in | 2.625 | 34.38% |
| 1 × 6 nominal | 0.75 in × 5.5 in | 4.125 | 31.25% |
| 1 × 8 nominal | 0.75 in × 7.25 in | 5.4375 | 32.03% |
| 1 × 10 nominal | 0.75 in × 9.25 in | 6.9375 | 30.63% |
| 1 × 12 nominal | 0.75 in × 11.25 in | 8.4375 | 29.69% |
| 5/4 × 4 nominal | 1 in × 3.5 in | 3.5 | 30% |
| 5/4 × 6 nominal | 1 in × 5.5 in | 5.5 | 26.67% |
| 2 × 2 nominal | 1.5 in × 1.5 in | 2.25 | 43.75% |
| 2 × 3 nominal | 1.5 in × 2.5 in | 3.75 | 37.5% |
| 2 × 4 nominal | 1.5 in × 3.5 in | 5.25 | 34.38% |
| 2 × 6 nominal | 1.5 in × 5.5 in | 8.25 | 31.25% |
| 2 × 8 nominal | 1.5 in × 7.25 in | 10.875 | 32.03% |
| 2 × 10 nominal | 1.5 in × 9.25 in | 13.875 | 30.63% |
| 2 × 12 nominal | 1.5 in × 11.25 in | 16.875 | 29.69% |
| 3 × 4 nominal | 2.5 in × 3.5 in | 8.75 | 27.08% |
| 4 × 4 nominal | 3.5 in × 3.5 in | 12.25 | 23.44% |
| 4 × 6 nominal | 3.5 in × 5.5 in | 19.25 | 19.79% |
| 6 × 6 nominal | 5.5 in × 5.5 in | 30.25 | 15.97% |
| 8 × 8 nominal | 7.25 in × 7.25 in | 52.5625 | 17.87% |
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