US News -- About 1 in 3 adults has high blood pressure, but many people don’t do a good job of controlling the problem because medications can be pricey. And doctors may not be doing all they can, either. According to new research, released last week during the annual meeting of the American Heart Association’s Council for High Blood Pressure Research, many doctors fail to follow national guidelines that call for treating people above the 120/80 level. Here, then, is an online calculator from the American Heart Association that will help you calculate your risk, as well as five low-cost ways to lower your blood pressure.