Body Weight

Source: MedlinePlus Health Topics, U.S. National Library of Medicine

Last synced 8/9/2026Status: primary verified

What is body weight? Body weight is the total mass of your body. Keeping track of your weight is one way to check for changes in your health, but it can't tell you the whole story. That's because your weight includes muscle, bone, fat, and water. Also, everyday factors can play a role in your weight, such as your: Diet Activity level Stress level Sleep habits Family history and genetics Age What factors help determine a healthy body weight? A healthy weight is more than just a number on the scale. It's about feeling good, having energy, and lowering your risk of disease. Your health care provider can help you determine a healthy body weight based on several factors. These include your: Body Mass Index (BMI). BMI is a measure of how much you weigh compared to how tall you are. The higher your BMI, the higher your risk for certain diseases. BMI does not distinguish between fat, muscle, and bone mass. It also may overestimate body fat in athletes or those with a muscular build, or underestimate body fat in older persons or others who have lost muscle. Waist circumference. If most of your body fat is around your abdomen (belly) rather than your hips, you may be at a higher risk for heart disease and type 2 diabetes . Health history. Your health care provider will likely consider your risk factors for diseases and health conditions, such as having high cholesterol , in determining your healthy body weight. What are body weight ranges? Having a healthy body weight may lower your chance of developing certain health problems. Carrying too much or too little weight can affect your health. Ranges of body weight include: Underweight. Your weight is lower than it should be for your health. Normal. Your weight is within a healthy range. Overweight. Your weight is greater than it should be for your health. Obese . Your body fat is greater than it should be for your health. Body weight needs can be different at different ages. For children, weight and growth are tracked over time

Educational only

This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.