Lumber size converter
Enter a US nominal size (2x4) to see actual inches, actual millimeters and the closest common French section.
Inputs
Result
Actual dimensions (inches)
1.5 x 3.5in
Actual dimensions (mm)
38.1 x 88.9mm
Closest French section
Chevron 50x75
Notes
US sizes are nominal: a 2x4 actually measures 38 x 89 mm. The French sections listed here match what you will find at a big-box DIY store.