Body Composition Analysis
Understand What Your Weight Is Actually Made Of
Body composition refers to the ratio of fat to lean muscle tissue in the body, typically expressed as a percentage of total body weight. It's a more complete picture of your health than the number on a scale alone, which can't tell you how much of your weight comes from fat versus muscle.
Understanding your body composition can be a useful starting point when thinking about your weight loss goals and overall wellness.
Calculate
Calculate Your Body
Fat Percentage
Enter your measurements below for an estimated body fat percentage. This takes just a few minutes and can help give you a clearer starting point as you consider your next steps.
What is Body Mass Composition?
Body mass composition is the amount of fat versus lean muscle tissue in the human body. This is commonly expressed as a percentage of a person's total weight. Body weight alone is not a clear indicator of good health because it does not distinguish how many pounds are from fat and how many are from lean body mass.
Calculate Your Body Fat Percentage
Estimated body fat
Fat mass
Lean mass
Results are estimates and are not a substitute for professional medical evaluation. Please consult your healthcare provider with any questions about your health.
Optimal Body Fat Ranges By Age
Men
20-29 yrs
7-17%
30-39 yrs
12-21%
40-49 yrs
14-23%
50-59 yrs
16-24%
60+ yrs
17-25%
Women
20-29 yrs
16-24%
30-39 yrs
17-25%
40-49 yrs
19-28%
50-59 yrs
22-31%
60+ yrs
22-33%
Source: “What is Body Composition.” WebMD, 17 May 2026, www.webmd.com/fitness-exercise/what-is-body-composition