Body Fat Percentage Calculator
This tool estimates body fat percentage using the US Navy tape method: neck and waist circumference (plus hip for women) with height. Measure your waist at the navel and neck below the larynx. Results are estimates with roughly 3–4% error; for precise measurement, use body-composition analyzers at a nutrition clinic.
Gender
Medical disclaimer: This tool is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
Frequently asked questions
What is a normal body fat percentage?
Men: 10–20% is good, 20–25% acceptable, above 25% high. Women: 18–28% good, 28–32% acceptable, above 32% high. Athletes usually measure lower.
What is the difference between BMI and body fat?
BMI cannot distinguish muscle from fat, so a muscular athlete may read "overweight". Body fat percentage measures actual composition and gives a more accurate picture.
How do I lower body fat?
A moderate calorie deficit + resistance training to preserve muscle + adequate protein and sleep. Sustainable changes beat crash diets — consult a nutritionist for a personal plan.