Conventional medicine is the type of medicine that the people who control the medical education system have deemed to be the most appropriate system of medical care. In the United States, conventional medicine consists primarily of drugs and surgery, which are the most widely used treatment modalities.
There are common established heights for table/counter surface and seating combinations. They are: Table height: 30in (750mm), with a chair at 18in (450mm). Counter height: 36in (900mm), with stools at 24 in (600mm). Standard bar height: 42in (1050mm), stools at 30in (750mm).
Although you can expect your bar stool to be approximately 28 to 30 inches, you should realize that ultimately it is determining the stool's best height in relation to the bar itself that matters.