Standard conventions support the 42 inch bar height.
Standard bar counter height and depth.
Not too deep the standard depth of wet bar countertop takes a couple of.
A counter height table usually measures 34 to 36 inches and can be paired with chairs or stools at with a seat height of 24 to 26 inches.
Obviously your bar can be any height.
Counter height tables are slightly higher than the standard dining table.
For example you might want to match a counter height in a nearby kitchen.
Most standard bar stools are between 24 to 32 inches high to be used with bars in the 41 to 43 inch height range.
The depth of the back bar is anywhere from 24 to 30 inches and 36 to 42.
The standard height of a finished bar which includes the countertop material and the body of the bar should be 42 inches.
The bottom bar is 30 inches high.
The 42 inch height factors in the 29 to 32 inch height of standard bar stools plus a clearance of 10 to 13 inches from the top of the stool seat to the countertop.
Most pre made backsplashes are four to six inches tall.
A commercial bar is usually about 42 inches high according to hardwoods incorporated.
When that height is added to the standard countertop height the backsplash can slip underneath the overhang of the finished bar top for a smooth transition.