The average body fat percentage for American men is roughly 23% in the late teens and climbs to about 31% by age 60 to 79. For women, averages range from about 32% in childhood to around 42% in that same older age bracket. These numbers come from DXA scans (the gold standard for body composition measurement) of more than 22,000 people in a nationally representative CDC survey.
Those averages are higher than most people expect, and they’re well above what fitness charts label as “ideal.” Understanding where you fall relative to the population, and what actually matters for health, requires a closer look at how body fat varies by sex, age, and activity level.
How Sex and Age Shape Body Fat
Women carry significantly more body fat than men at every age. This isn’t a lifestyle difference. It’s biological. Women need more essential fat for reproductive and hormonal functions: roughly 12% of body mass, compared to about 3% for men. Essential fat lives in nerve tissues, bone marrow, organ membranes, and (in women) breast tissue. You cannot lose it without compromising basic body functions.
Body fat also rises steadily with age regardless of sex. After age 30, people gradually lose lean tissue. Muscles, the liver, kidneys, and other organs all lose cells through a process called atrophy. Because lean mass shrinks while fat mass tends to increase, older adults can have nearly one third more fat than they carried in their twenties, even if their weight on the scale hasn’t changed much. Fat also redistributes with age, shifting away from just under the skin and building up deeper in the body, around internal organs.
What Counts as a Healthy Range
There’s no single “healthy” number. The clinical thresholds that researchers use to define excess body fat are higher than many fitness infographics suggest. A large study referenced by Harvard Health defined overweight as 25% body fat or higher for men and 36% or higher for women. Obesity was defined at 30% for men and 42% for women. By those standards, a man at 20% or a woman at 30% would fall within a normal, healthy range.
Competitive athletes sit well below population averages. In a study of more than 700 athletes across 18 sports, the average body fat was 18.2% for men and 27.1% for women, both around age 21. Male basketball players averaged the lowest at about 15%, while female runners came in around 23.5%. Non-athletes of the same age averaged 21.6% (men) and 31.7% (women). The data suggest that the practical floor for healthy, training athletes is roughly 10% for men and 16% for women. Going below those levels doesn’t appear to support the demands of regular training.
Why the Type of Fat Matters
Not all body fat carries the same health risk. Subcutaneous fat, the layer you can pinch under your skin, is relatively benign in moderate amounts. Visceral fat, which surrounds your internal organs deep in the abdomen, is the type linked to cardiovascular disease, insulin resistance, and metabolic problems. A healthy target is for visceral fat to make up no more than about 10% of your total body fat.
You can’t easily measure visceral fat at home, but waist circumference is a rough proxy. People who gain weight primarily around the midsection tend to accumulate more visceral fat than those who carry weight in their hips and thighs. This is one reason why body fat percentage alone doesn’t tell the whole health story, and why two people with the same overall percentage can have very different metabolic risk profiles.
How Body Fat Is Measured
The method you use to measure body fat matters more than most people realize. DXA scans (a type of low-dose X-ray) are the standard used in large research studies and clinical settings. They provide the most reliable full-body composition breakdown, separating fat, muscle, and bone.
Bioelectrical impedance devices, including the scales you can buy for home use, send a small electrical current through your body and estimate fat based on resistance. They’re convenient but can swing several percentage points depending on your hydration, when you last ate, and whether you’ve exercised recently. Skinfold calipers, where a trained person pinches skin at specific sites, have a standard error of about 3.5% and work best for leaner individuals. For tracking trends over time, any consistent method works. For an accurate snapshot of where you stand, DXA is the most trustworthy option.
Global Variation
Body fat levels vary considerably across regions. While direct body fat data by country is limited, overweight prevalence offers a window: in 2022, 67% of adults in the Americas were classified as overweight, compared to 31% in Southeast Asia and Africa. Genetics, diet patterns, physical activity norms, and food availability all contribute to these differences, which means “average” body fat depends heavily on which population you’re comparing yourself to.