How is BMI calculated? How is BMI interpreted for adults? Is BMI interpreted the same way for children and teens as it is for adults? How good is BMI as an indicator of body fatness? If an athlete or other person with a lot of muscle has a BMI over 25, is that person still considered to be overweight? What are the health consequences of obesity for adults? To receive email updates about this topic, enter your email address.
Email Address. What's this? Division of Nutrition, Physical Activity, and Obesity. Related Topics. Links with this icon indicate that you are leaving the CDC website. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. You will be subject to the destination website's privacy policy when you follow the link.
CDC is not responsible for Section compliance accessibility on other federal or private website. Cancel Continue. For children and young people aged 2 to 18, the BMI calculation takes into account age and gender as well as height and weight. If you want to calculate your BMI, try our healthy weight calculator. BMI takes into account natural variations in body shape, giving a healthy weight range for a particular height.
As well as measuring your BMI, healthcare professionals may take other factors into account when assessing if you're a healthy weight. Muscle is much denser than fat, so very muscular people, such as heavyweight boxers, weight trainers and athletes, may be a healthy weight even though their BMI is classed as obese.
Your ethnic group can also affect your risk of some health conditions. Back to Healthy weight. Use this calculator to check your body mass index BMI and find out if you're a healthy weight. Or you can use it to check your child's BMI.
Being underweight could be a sign you're not eating enough or you may be ill. If you're underweight, a GP can help. Find out more in underweight adults. Keep up the good work! For tips on maintaining a healthy weight, check out the food and diet and fitness sections. The best way to lose weight if you're overweight is through a combination of diet and exercise.
The BMI calculator will give you a personal calorie allowance to help you achieve a healthy weight safely. The best way to lose weight if you're obese is through a combination of diet and exercise, and, in some cases, medicines. See a GP for help and advice. Black, Asian and other minority ethnic groups have a higher risk of developing some long-term chronic conditions, such as type 2 diabetes.
Measuring your waist is a good way to check you're not carrying too much fat around your stomach, which can raise your risk of heart disease, type 2 diabetes and stroke.
You can have a healthy BMI and still have excess tummy fat, meaning you're still at risk of developing these conditions.
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