Unlike body mass index (BMI), which only compares total weight to height, a body fat percentage calculator distinguishes between metabolically active muscle tissue and adipose fat mass.
The US Navy Circumference Method
The US Department of Defense developed logarithmic formulas based on tape measurements:
- Men: Uses Height, Neck circumference, and Waist circumference.
- Women: Uses Height, Neck circumference, Waist circumference, and Hip circumference.
Body Fat Categories for Men & Women
| Classification | Men (% Fat) | Women (% Fat) |
|---|---|---|
| Essential Fat | 2% – 5% | 10% – 13% |
| Athletes | 6% – 13% | 14% – 20% |
| Fitness | 14% – 17% | 21% – 24% |
| Average / Acceptable | 18% – 24% | 25% – 31% |
| Overweight / Obese | 25%+ | 32%+ |
To calculate tracking changes in your body measurements, use our Percentage Change Tool.