A person's BMI, or body mass index, is based on height and weight. It's often used to determine if a person is underweight, normal weight, overweight, or obese. But BMI doesn't consider muscle mass. Follow the links below to find WebMD's comprehensive coverage about how BMI is calculated, what it means, how to measure it with our innovative BMI Plus Calculator tool, and much more.
Body Mass Index (BMI)-Topic Overview
Your body mass index (BMI) and waist size affect your risk of type 2 diabetes,high blood pressure,high cholesterol,and coronary artery disease. The following table shows the risk. Body mass index (BMI) and the risk for diseases 1 Classification BMI Waist size and relative risk Men: less than 40 in. (102 cm) Women: less than 35 in. (88 cm) Men: 40 in. (102 cm) or more Women: 35 in. (88 ...
What Is Body Mass Index?
Learn how to use body mass index (BMI) to determine whether you are overweight.
Obesity-Exams and Tests
Along with a regular medical checkup, you may have some tests to monitor your health. Your doctor may want to do blood tests to check for type 2 diabetes, thyroid or liver problems, and high cholesterol or high triglyceride levels. Your doctor will check your blood pressure, ask about any medicines you are taking and discuss your medical history and your family's medical history. He or she will ..
Measuring Body Fat With a Caliper
Picture of using caliper to measure body fat; Using a high-quality professional tool called a caliper,a trained tester typically measures body fat at 3 to 9 sites on the body. The tester first pinches the skin and the fat that lies under the skin and pulls the skin and fat away from the muscle. The tester then places the caliper above or below the pinch and reads the measurement from the caliper dial. Usually about two or three ...
BMI, Waist Size, and Other Ways to See if You're Overweight
Read about BMI, waist size, and other measurements -- and why some fall short in gauging obesity.
Need to Lose Weight? Questions to Ask Your Doctor
When you're setting out to lose weight, your doctors can help. But they may not talk about it much until you bring it up. Use these questions to start the conversation.
How Accurate Is Body Mass Index, or BMI?
Is BMI still the best way to measure fatness? Some experts aren't so sure.
Jean's Story: Ice Hockey and a Healthy BMI
A woman's true story on weight loss success.
Slideshows & Images
Body Fat Distribution
Picture of apple-shaped and pear-shaped body fat distribution; Body fat distribution varies. Some people may be apple-shaped and carry most of their excess body fat around the stomach. Other people may be pear-shaped and carry most of their excess body fat around the hips,buttocks,and thighs. You can check to see if you are apple- or pear-shaped by dividing your waist measurement by your hip measurement. This will give you your waist-to-hip ratio. ...