Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method. Enter measurements for neck, waist, and hips to get your body fat category and lean mass.
Your Measurements
Frequently Asked Questions
How is body fat percentage calculated?▾
Uses the U.S. Navy formula estimating body fat from neck, waist, and hip (women only) circumferences plus height.
What is a healthy body fat percentage?▾
For men, 10-20% is fitness to acceptable. For women, 18-28%. Athletes may be lower.
How accurate is the Navy method?▾
Accurate to within 3-4% of DEXA scan results for most people.
Is my measurement data stored?▾
No. All calculations happen in your browser. No data is ever sent to a server.