Body fat percentage measures the proportion of your weight that is fat. Unlike BMI, it distinguishes between fat mass and lean mass (muscle, bone, water).
Healthy Ranges
| Category | Men | Women |
|---|---|---|
| Essential fat | 2–5% | 10–13% |
| Athletes | 6–13% | 14–20% |
| Fitness | 14–17% | 21–24% |
| Average | 18–24% | 25–31% |
| Obese | 25%+ | 32%+ |
How to Measure
Methods include skinfold calipers, bioelectrical impedance scales, DEXA scans (most accurate), and the Navy method (using neck and waist measurements).
Why Body Fat % Beats BMI for Individuals
Two people with identical BMI can have very different body compositions — one carrying more muscle, the other more fat. Body fat percentage directly measures what BMI only estimates indirectly, which is why athletes, bodybuilders, and anyone tracking body recomposition typically rely on body fat % rather than BMI alone.
Accuracy Trade-offs by Method
DEXA scans are considered the gold standard (±1–2% margin of error) but require a clinical visit. Bioelectrical impedance scales are convenient but can swing several percentage points based on hydration level alone. Skinfold calipers, done consistently by the same trained person, offer a reasonable middle ground for tracking trends over time.