Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. You can calculate your BMI to know if you are underweight, overweight, or obese.
Knowing your BMI can help you to monitor your weight and make changes to your diet and lifestyle if necessary. For example, if you are overweight or obese, losing weight can reduce your risk of developing chronic diseases such as heart disease, stroke, type 2 diabetes, and some types of cancer.