This is also going to depend on the type of seating you choose and what kind of overhang is recommended so that your guests can sit comfortably at the bar with enough leg room.
Typical bar counter depth.
The standard depth of wet bar countertop takes a couple of factors into consideration.
There are a few factors that determine these standard depths.
The standard depth for a kitchen island without a breakfast bar is 27 inches deep.
What factors determine the standard depths of countertops.
Average bar overhang is between 8 and 12 inches for leg room.
The top bar is around 18 to 24 deep and the bottom where the bartender works is usually 22 to 26 inches with a total depth of 28 to 38 inches.
This depth of a countertop with a breakfast bar will vary depending on the size of a breakfast bar.