Lumber Size Converter
Find the actual dimensions of standard finished lumber based on its nominal name.
Nominal to Actual Chart
In the US and Canada, "Nominal" size refers to the wood's dimensions before it is dried and planed.
Why the Difference?
Lumber is cut at the "nominal" size while wet. As it dries, it shrinks. Finally, it is planed (surfaced) to create smooth, consistent surfaces, further reducing its size.
Measurement Tip
When building structures, always use the **actual** dimensions for your calculations to ensure precise fitting and structural integrity.
Nominal to Actual Lumber Sizes
Instantly find the actual dimensions of standard finished lumber based on its nominal (2x4, 4x4) description.
Select Nominal
Choose the common name like 2x4 or 2x6.
See Actual
The tool shows the exact dressed dimensions after drying and planing.
Frequently Asked Questions
2x4 is the 'nominal' size before the wood is planed and dried. Dressing the lumber reduces its size.
Related Tools
View allRebar Size Converter
Convert rebar numbering to diameter and weight.
Word Counter
Count words and chars.
Unit Converter
Convert length, weight, etc.
Lorem Ipsum
Generate placeholder text.
Device Information
See your device specs.
QR Code Generator
Create QR codes.
Last updated on