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.

Browse all predefined value pages · View full HTML sitemap

Nominal to Actual Lumber Size Lookup

Select a nominal board size to see the corresponding actual surfaced dimensions.

Actual Dimension Result

Reference Table

Use this complete table for quick lookup and internal linking to specific value pages.

Nominal to Actual Lumber Size Reference
Nominal SizeActual SizeActual Area (in²)Area Reduction
1 × 2 nominal0.75 in × 1.5 in1.12543.75%
1 × 3 nominal0.75 in × 2.5 in1.87537.5%
1 × 4 nominal0.75 in × 3.5 in2.62534.38%
1 × 6 nominal0.75 in × 5.5 in4.12531.25%
1 × 8 nominal0.75 in × 7.25 in5.437532.03%
1 × 10 nominal0.75 in × 9.25 in6.937530.63%
1 × 12 nominal0.75 in × 11.25 in8.437529.69%
5/4 × 4 nominal1 in × 3.5 in3.530%
5/4 × 6 nominal1 in × 5.5 in5.526.67%
2 × 2 nominal1.5 in × 1.5 in2.2543.75%
2 × 3 nominal1.5 in × 2.5 in3.7537.5%
2 × 4 nominal1.5 in × 3.5 in5.2534.38%
2 × 6 nominal1.5 in × 5.5 in8.2531.25%
2 × 8 nominal1.5 in × 7.25 in10.87532.03%
2 × 10 nominal1.5 in × 9.25 in13.87530.63%
2 × 12 nominal1.5 in × 11.25 in16.87529.69%
3 × 4 nominal2.5 in × 3.5 in8.7527.08%
4 × 4 nominal3.5 in × 3.5 in12.2523.44%
4 × 6 nominal3.5 in × 5.5 in19.2519.79%
6 × 6 nominal5.5 in × 5.5 in30.2515.97%
8 × 8 nominal7.25 in × 7.25 in52.562517.87%