A standard 4x4, which typically refers to a piece of lumber, is 3-½ inches by 3-½ inches.
Understanding 4x4 Dimensions
When you hear the term "4x4" in the context of construction or woodworking, it usually refers to a specific size of lumber. The number "4x4" is the nominal dimension, which is the size of the lumber before it has been dried and milled (planed smooth). The actual size is smaller due to these processes.
According to common lumber standards, as referenced, while the nominal size is 4 inches by 4 inches, the actual size of a finished 4x4 piece of lumber is:
- Width: 3-½ inches
- Thickness: 3-½ inches
This difference between nominal and actual size is standard across most common lumber dimensions, such as 2x4s or 1x4s. For example, a 1x4 piece is actually ¾ inches by 3-½ inches.
Nominal vs. Actual Lumber Sizes
It's important to know the difference between the nominal and actual sizes when planning projects. Here's a quick comparison for common sizes mentioned:
| Nominal Size | Actual Size |
|---|---|
| 4x4 | 3-½" x 3-½" |
| 2x4 | 1-½" x 3-½" |
| 1x4 | ¾" x 3-½" |
This standardized sizing helps ensure consistency in building projects. So, while you ask for a "4x4," you receive a piece measuring 3-½" x 3-½".
