## What does 2 by 4 inches mean?

2. That measures two inches by four inches, two feet by four feet, etc.

**What is a 2 by 4 in inches?**

A 2×4 is actually 3-½ inches by 1-½ inches.

### Are 2×4 really 2×4?

DIMENSIONAL LUMBER: In the past, when a timber was called a 2×4 [or “two-by-four”], it actually measured 2 inches by 4 inches. Because of this extra milling, a 2×4 no longer measures a full 2 inches by four inches. Instead, a 2×4 is really only 1 1/2″ by 3 1/2″.

**Are 2×6 really 2×6?**

In North America, the 2×6 size is actually referring to the lumber’s “nominal” dimension. A 2×6’s real or true dimension is 1.5″ x 5.5″ – within the industry it is referred to as its “actual” size. The nominal size is used when discussing lumber nearly 100% of the time! Same for 1×4, 2×4 and 4×4 etc.

#### What’s the actual size of a 2×6?

Nominal vs. Actual Measurements of Dimension Lumber

Nominal Size | Actual Size |
---|---|

2 x 3 | 1 1/2 x 2 1/2 inches (38 x 64 mm) |

2 x 4 | 1 1/2 x 3 1/2 inches (38 x 89 mm) |

2 x 6 | 1 1/2 x 5 1/2 inches (38 x 140 mm) |

2 x 8 | 1 1/2 x 7 1/4 inches (38 x 184 mm) |

**Why are wood dimensions wrong?**

The “nominal” cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The nominal measurement is made before the lumber is surfaced.

## Why do they call them 2×4?

The ubiquitous lumber product known as the 2×4 does not, in fact, measure two inches thick by four inches wide. The naming of this building material is the result of compromise between forestry technology, species’ properties, forest composition, transportation efficiency, construction speed, and price competition.

**What is the price of a 2 by 4?**

Lumber Prices

Board | Stud* | 12′ |
---|---|---|

2×3 | ||

2×4 | $5.17 | $9.13 |

2×6 | $8.82 | $13.76 |

### What is the true measurement of a 2×10?

Nominal vs. Actual Measurements of Dimension Lumber

Nominal Size | Actual Size |
---|---|

2 x 8 | 1 1/2 x 7 1/4 inches (38 x 184 mm) |

2 x 10 | 1 1/2 x 9 1/4 inches (38 x 235 mm) |

2 x 12 | 1 1/2 x 11 1/4 inches (38 x 286 mm) |

4 x 4 | 3 1/2 x 3 1/2 inches (89 x 89 mm) |