📊 Body Fat Calculator
Estimate your body fat percentage using the US Navy method — just a few simple body measurements needed.
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Calculate Body Fat %
What Is Body Fat Percentage?
Body fat percentage is the proportion of your total body weight that consists of fat tissue. Unlike BMI, which only uses height and weight, body fat percentage gives a more direct picture of body composition — the ratio of fat to lean mass (muscle, bone, water, organs).
This calculator uses the US Navy method, which estimates body fat from circumference measurements. It is one of the most practical and reasonably accurate methods available without specialized equipment.
Healthy Body Fat Ranges
| Category | Men | Women |
|---|---|---|
| Essential Fat | 2 – 5% | 10 – 13% |
| Athletic | 6 – 13% | 14 – 20% |
| Fitness | 14 – 17% | 21 – 24% |
| Average | 18 – 24% | 25 – 31% |
| Obese | 25%+ | 32%+ |
How to Measure Correctly
- Waist: Measure horizontally at the narrowest point of your torso, usually at or just above the belly button. Exhale normally before measuring.
- Neck: Measure just below the larynx (Adam's apple), sloping slightly downward at the front.
- Hips (women only): Measure at the widest point of your hips and buttocks, keeping the tape horizontal.
Note: The US Navy method has a margin of error of ±3–4%. For more accurate body fat measurement, DEXA scan or hydrostatic weighing is recommended. These results are estimates for general reference only — not for clinical use.