Free Body Fat Calculator
Estimate your body fat percentage using the US Navy method. No signup needed.
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Frequently Asked Questions
What is the US Navy body fat method? +
The US Navy method estimates body fat percentage using circumference measurements of the neck, waist, and hips (for women), along with height. It was developed by the US Navy as a reliable field method for assessing body composition without specialized equipment.
How accurate is the US Navy body fat formula? +
The US Navy method is generally accurate within 1-3% of more precise methods like DEXA scans. It's one of the most reliable circumference-based methods and is widely used by military and fitness professionals.
What is a healthy body fat percentage? +
For men, essential fat is 2-5%, athletes 6-13%, fitness 14-17%, average 18-24%, and obese is 25%+. For women, essential fat is 10-13%, athletes 14-20%, fitness 21-24%, average 25-31%, and obese is 32%+.
Where should I measure my waist for this calculator? +
Measure your waist at the navel (belly button) level. For the neck, measure just below the larynx (Adam's apple). For hips (women only), measure at the widest point. All measurements should be taken on bare skin with a flexible tape measure.
Is my data stored or sent anywhere? +
No. All calculations happen entirely in your browser. Your measurements are never sent to any server or stored anywhere. Your privacy is fully protected.
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