Body Fat Percentage Calculator
Enter neck and waist (plus hip for females) along with your height.
Body fat %
23%
Average
How it works
The US Navy method plugs body measurements into a logarithmic formula to estimate body fat with reasonable accuracy, faster than DEXA scans.
Formula
Male: 86.010·log10(waist−neck) − 70.041·log10(height) + 36.76
Worked example
Male, 178cm, neck 38, waist 85 ≈ 16%.
FAQ
- Healthy ranges?
- Male: 10–20% healthy. Female: 18–28%.
- Accurate?
- Within ±3% vs DEXA for most people.
- Where to measure?
- Neck below larynx, waist at navel, hip at widest point.