What to know
Body mass index (BMI) is a calculated measure of weight relative to height. For adults, BMI is categorized into underweight, healthy weight, overweight, and obesity. Obesity is further subdivided into three classes. This BMI calculator is for adults 20 and older.
Adult BMI Calculator
This calculator provides BMI and the corresponding BMI category for adults 20 and older. For children and teens 2 through 19 years, use the BMI Calculator for Children and Teens.
BMI is one potential health indicator and should be considered with other factors when assessing an individual's health. These factors may include a patient's medical history, health behaviors, physical exam findings, and laboratory findings. Read more About BMI. Persons may consider seeking advice from their health care providers about their BMI. This calculator is not a substitute for professional medical advice.
Adult BMI Calculator
Note: this calculator uses JavaScript. If you have JavaScript turned off or have problems using the calculator, use the formula for calculating BMI on About BMI.