Lumber Size Guide

Lumber is sold by nominal (stated) size, but actual dimensions are smaller due to drying and milling. Use the actual dimensions for your calculations.
Nominal Size Actual Size (in) Actual Size (mm)
1ร—23/4 ร— 1-1/219 ร— 38
1ร—43/4 ร— 3-1/219 ร— 89
1ร—63/4 ร— 5-1/219 ร— 140
1ร—83/4 ร— 7-1/419 ร— 184
1ร—103/4 ร— 9-1/419 ร— 235
1ร—123/4 ร— 11-1/419 ร— 286
2ร—21-1/2 ร— 1-1/238 ร— 38
2ร—41-1/2 ร— 3-1/238 ร— 89
2ร—61-1/2 ร— 5-1/238 ร— 140
2ร—81-1/2 ร— 7-1/438 ร— 184
2ร—101-1/2 ร— 9-1/438 ร— 235
2ร—121-1/2 ร— 11-1/438 ร— 286
4ร—43-1/2 ร— 3-1/289 ร— 89
4ร—63-1/2 ร— 5-1/289 ร— 140
6ร—65-1/2 ร— 5-1/2140 ร— 140

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