Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy method — just waist, neck, and hip (women) measurements. Shows fat mass, lean mass, category, and a visual gauge. No calipers needed.
Reference Ranges (male)
| Essential Fat | < 6% |
| Athletic | 6–13% |
| Fitness ◀ You | 14–17% |
| Average | 18–24% |
| Obese | ≥ 25% |
How to measure (US Navy Method)
Waist: Measure at navel level. Neck: Below larynx, sloping down slightly. Hip (women only): Widest point. All measurements in a relaxed, normal breath.
How it works
This body fat percentage calculator runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.
Frequently Asked Questions
How accurate is the US Navy body fat method?
The US Navy method has an error of ±3–4% compared to DEXA (gold standard). It's significantly more useful than BMI for fitness tracking.
What body fat percentage is considered healthy?
For men: Athletic 6–13%, Fitness 14–17%, Average 18–24%. For women: Athletic 14–20%, Fitness 21–24%, Average 25–31%.