Misconceptions of Lumber Sizes

You often hear about lumber sizes such as 1×2. However, these are not the exact sizes of the lumber you are buying. Listed below are some examples demonstrating the difference in the name of lumber sizes to the actual size.

All sizes are in inches

What it is called Actual Size
1×2 3/4″ x 1 1/2″
1×3 3/4″ x 2 1/2″
1×4 3/4″ x 3 1/2″
1×6 3/4″ x 5 1/2″
1×8 3/4″ x 7 1/4″
1×10 3/4″ x 9 1/4″
1×12 3/4″ x 11 1/2″