Body fat percentage tells you more than the scale. Here are the healthy ranges and what they mean.
Because women carry more essential fat for hormonal health, healthy ranges differ. Broadly, a good range is about 10–20% for men and 18–28% for women. Athletes are often lower; the priority is staying in a healthy band, not chasing the lowest possible number.
A common classification (ACE) for men is: essential 2–5%, athletes 6–13%, fitness 14–17%, average 18–24%, and 25%+ considered obese. For women: essential 10–13%, athletes 14–20%, fitness 21–24%, average 25–31%, and 32%+ obese.
BMI uses only height and weight, so it can mislabel muscular people as overweight and skinny-fat people as healthy. Body fat percentage measures composition directly, which is why it's a better marker of fitness and health than BMI alone.
Options range from quick to precise: circumference-based estimates and smart scales are convenient; skinfold calipers are cheap and decent with practice; DEXA scans and hydrostatic weighing are the most accurate but cost more. Measure under the same conditions each time to track trends.
Reducing body fat comes down to a modest calorie deficit, high protein to preserve muscle, and resistance training. Aim for gradual loss — about 0.5–1% of body weight per week — to keep the muscle you have. Crash diets tend to cost lean mass.