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.
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 Detailed ResultsBased on the information entered, your body mass index (BMI) is 0, indicating your weight is in the category for adults of your height. Obesity is sub-divided into 3 classes, and your BMI falls into Class 0, also called Severe Obesity.
BMI Category Ranges Table BMI Category BMI RangeUnderweight
Below 18.5
Healthy Weight
18.5 to 24.9
Overweight
25.0 to 29.9
Obesity
30.0 or greater
Class 1 Obesity30.0 to 34.9
Class 2 Obesity35.0 to 39.9
Class 3 Obesity
(Severe Obesity)
40.0 or greater
Maintaining a BMI in the Healthy Weight range is one way to support overall health as you age. Discuss your BMI with your healthcare provider as BMI may relate to your overall health and well-being. For more information about lifestyle approaches, visit Healthy Weight and Growth. BMI is a screening measure and is not intended to diagnose disease or illness.
Discuss your BMI category with your healthcare provider as BMI may relate to your overall health and well-being. Your healthcare provider might determine possible reasons for underweightoverweightexcess weight and recommend support or treatment. BMI is a screening measure and is not intended to diagnose disease or illness.
For more information, visit About BMI or BMI Frequently Asked Questions.
The calculated BMI appears to be out of range. Please check the accuracy of the information you entered.
Please wait while your BMI is calculated...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.
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