Fitness
Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy circumference method.
Body Fat %
β
How It Works
Uses the US Navy circumference method: BF% = 86.010 Γ log10(Waist β Neck) β 70.041 Γ log10(Height) + 36.76 (for men). Measure waist at navel, neck below larynx. Accuracy is Β±3β4%.
Example
Waist 34", Neck 15", Height 70" β estimated body fat β 17%.
Frequently Asked Questions
What is a healthy body fat percentage?
For men: 6β17% is fit/athletic, 18β24% is acceptable. For women: 16β24% is fit/athletic, 25β31% is acceptable. Above 25% (men) or 32% (women) is considered obese.
Is this calculator accurate?
The Navy method is accurate within Β±3β4% for most people. DEXA scans are the gold standard. Hydrostatic weighing and skinfold calipers are also more precise.
How do I lower body fat?
A caloric deficit through diet is most effective. Resistance training preserves muscle mass during fat loss. Cardio increases the deficit. Consistency over weeks and months is key.