# Softwood Lumber - Dimensions

## Commercial softwood lumber dimension chart - nominal and actual sizes

*Dimensional lumber* is a term used for lumber that is finished - planed and cut - to a standardized width and depth specified in inches.

Commercial lumber dimensions - American Softwood Lumber Standards - nominal and actual sizes are indicated in the table below.

### General rule converting nominal to actual softwood dimensions

- subtract 1/4 inch for dimensions under 2 inches (51 mm)
- subtract 1/2 inch for dimensions under 8 inches (200 mm)
- subtract 3/4 inch for larger dimensions

Nominal Size(in x in) | Actual Size | ||
---|---|---|---|

(in x in) | (mm x mm) | Weight(lb/ft)Load Calculator! | |

1 x 1 | 3/4 x 3/4 | 19 x 19 | 0.14 |

1 x 2 | 3/4 x 1 1/2 | 19 x 38 | 0.27 |

1 x 3 | 3/4 x 2 1/2 | 19 x 64 | 0.47 |

1 x 4 | 3/4 x 3 1/2 | 19 x 89 | 0.64 |

1 x 6 | 3/4 x 5 1/2 | 19 x 140 | 1.00 |

1 x 8 | 3/4 x 7 1/4 | 19 x 184 | 1.32 |

1 x 10 | 3/4 x 9 1/4 | 19 x 235 | 1.69 |

1 x 12 | 3/4 x 11 1/4 | 19 x 286 | 2.05 |

2 x 2 | 1 1/2 x 1 1/2 | 38 x 38 | 0.55 |

2 x 3 | 1 1/2 x 2 1/2 | 38 x 64 | 0.94 |

2 x 4 | 1 1/2 x 3 1/2 | 38 x 89 | 1.28 |

2 x 6 | 1 1/2 x 5 1/2 | 38 x 140 | 2.00 |

2 x 8 | 1 1/2 x 7 1/4 | 38 x 184 | 2.64 |

2 x 10 | 1 1/2 x 9 1/4 | 38 x 235 | 3.37 |

2 x 12 | 1 1/2 x 11 1/4 | 38 x 286 | 4.10 |

2 x 14 | 1 1/2 x 13 1/4 | 38 x 337 | 4.83 |

3 x 3 | 2 1/2 x 2 1/2 | 64 x 64 | 1.52 |

3 x 4 | 2 1/2 x 3 1/2 | 64 x 89 | 2.13 |

3 x 6 | 2 1/2 x 5 1/2 | 64 x 140 | 3.34 |

3 x 8 | 2 1/2 x 7 1/4 | 64 x 184 | 4.41 |

3 x 10 | 2 1/2 x 9 1/4 | 64 x 235 | 5.62 |

3 x 12 | 2 1/2 x 11 1/4 | 64 x 286 | 6.84 |

3 x 14 | 2 1/2 x 13 1/4 | 64 x 337 | 8.05 |

3 x 16 | 2 1/2 x 15 1/4 | 64 x 387 | 9.27 |

4 x 4 | 3 1/2 x 3 1/2 | 89 x 89 | 2.98 |

4 x 6 | 3 1/2 x 5 1/2 | 89 x 140 | 4.68 |

4 x 8 | 3 1/2 x 7 1/4 | 89 x 184 | 6.17 |

4 x 10 | 3 1/2 x 9 1/4 | 89 x 235 | 7.78 |

4 x 12 | 3 1/2 x 11 1/4 | 89 x 286 | 9.57 |

4 x 14 | 3 1/2 x 13 1/4 | 89 x 337 | 11.28 |

4 x 16 | 3 1/2 x 15 1/4 | 89 x 387 | 12.98 |

*1 lb/ft = 1.48 kg/m**1 in (inch) = 25.4 mm*- Weight vs mass - the difference

Weight is based on dry wood with *35 lb/ft ^{3} (560 kg/m^{3})* actual volume.

**Rough Lumber**- sawn, trimmed and edged - faces are rough with saw marks**Surfaced Lumber (dressed)**- Rough lumber that has been smoothed on one or more sides and edges by a surfacing machine.**Worked Lumber**- Surfaced lumber that has been matched and patterned

Dry lumber is defined as lumber with less than 19% moisture. Unseasoned or green lumber is lumber with more than 19% moisture.