4x6 Actual Size
Find the actual thickness, width, and metric dimensions of a standard 4x6 lumber board.
4x6 Actual Dimensions
| Measurement | Actual Size |
|---|---|
| Nominal Size | 4 × 6 inches |
| Actual Thickness | 3.5 inches |
| Actual Width | 5.5 inches |
| Metric Size | 89 × 140 mm |
What Is the Actual Size of a 4x6?
A commonly sold dry 4x6 board has an actual finished size of approximately 3.5 inches thick × 5.5 inches wide.
The name 4x6 refers to the nominal size of the lumber rather than its final finished dimensions.
Why Is a 4x6 Not Actually 4 by 6 Inches?
Lumber is typically cut larger than its final dimensions and then dried and surfaced. Planing and finishing reduce the dimensions, which is why a nominal 4x6 is commonly about 3.5 × 5.5 inches after finishing.
4x6 Size in Millimeters
The commonly referenced metric dimensions are approximately 89 × 140 mm.
Actual dimensions can vary depending on lumber grade, moisture condition, manufacturer, and product specifications.
Common Uses for 4x6 Lumber
4x6 lumber is commonly used for beams, posts, supports, landscaping structures, decks, and other construction applications.
Related Lumber Sizes
FAQ
How thick is a 4x6?
A commonly sold dry 4x6 is about 3.5 inches thick.
How wide is a 4x6?
A commonly sold dry 4x6 is about 5.5 inches wide.
What is a 4x6 in millimeters?
The commonly referenced metric size is approximately 89 × 140 mm.