Understanding Body Fat Percentage
Body Fat Percentage is the total mass of fat divided by total body mass, multiplied by 100. It distinguishes between your "fat mass" and your "lean mass" (muscle, bone, organs, and water). This distinction is critical because two people with the same weight and height can have vastly different health profiles.
Healthy Ranges
Healthy fat ranges vary significantly by biological sex and age:
For Men:
- Athletes: 6–13%
- Fitness: 14–17%
- Average: 18–24%
- Obese: 25%+
For Women:
- Athletes: 14–20%
- Fitness: 21–24%
- Average: 25–31%
- Obese: 32%+
Essential vs. Storage Fat
Not all fat is bad. Essential fat is necessary for life and reproductive functions (3-5% for men; 10-13% for women). Storage fat is the accumulation of adipose tissue that protects internal organs and provides energy.
How to Measure Body Fat
There are several methods, ranging in accuracy and cost:
- DEXA Scan: The gold standard for clinical accuracy.
- Hydrostatic Weighing: Measuring displacement in a water tank.
- Skinfold Calipers: Requires a skilled technician.
- Bioelectrical Impedance (BIA): Common in smart scales (often inconsistent).
- US Navy Method: Uses circumference measurements (highly accessible).
Why It Matters
High body fat levels, particularly visceral fat (fat around the midsection), are strongly linked to metabolic syndrome, heart disease, and chronic inflammation.
Estimate your body fat percentage now using the US Navy Method Calculator.