The adult body mass index chart is the most common way to measure whether a person is underweight, at a healthy weight, overweight or obese, according to Health.gov. This chart displays a weight range for each height in the categories of healthy weight, overweight and obese.
While used by many doctors as the standard for determining whether or not a patient is at a healthy weight, a BMI chart is not without flaws. It doesn't take muscle mass or bone density into account. A person with strong bones and good muscle tone may have a higher calculated BMI than someone who is less fit, according to NPR.