Basically, BMI is your weight in kilograms divided by the square of your height in meters. According to the CDC, a high BMI can indicate high body fatness, and is a commonly used method of screening for weight category, such as underweight, normal or healthy weight, overweight, and obese. BMI is an inexpensive, easy to use calculation that clinicians rely on for the general public, since it only requires height and weight measurements. Used alone, BMI isn’t a diagnostic indicator for health risk; this is why your healthcare provider should perform additional assessments to determine this, such as skinfold thickness measurements, evaluations of diet, physical activity, and family history.