A body fat percentage calculator estimates the proportion of your body weight that is fat using circumference measurements, waist, neck, and hip (for women), via the U.S.
About this calculator
A body fat percentage calculator estimates the proportion of your body weight that is fat using circumference measurements, waist, neck, and hip (for women), via the U.S. Navy Body Fat Method. This method provides a reasonably accurate estimate without expensive equipment.
Body fat percentage is a more useful health metric than weight or BMI because it distinguishes fat mass from lean mass. The same weight person can have very different health profiles depending on their body composition.
Common uses
- Estimate body fat percentage without gym equipment
- Track body composition changes during a diet or exercise program
- Determine fitness category (essential fat, athletes, fitness, average, obese)
- Set a body fat percentage target for fitness goals
Frequently asked questions
What are healthy body fat percentage ranges?
For men: Essential fat 2–5%, Athletes 6–13%, Fitness 14–17%, Average 18–24%, Obese 25%+. For women: Essential fat 10–13%, Athletes 14–20%, Fitness 21–24%, Average 25–31%, Obese 32%+. Women naturally carry more essential fat than men due to hormonal and reproductive needs.
How accurate is the U.S. Navy body fat method?
The Navy method has an accuracy of approximately ±3–4% compared to DEXA scans (the gold standard). It is less accurate for very muscular or very obese individuals. For best results, take measurements at the same time of day (morning before eating) and average two or three readings.