Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method and BMI-based formula. Compare results from two methods.
Frequently Asked Questions
How accurate are body fat estimates?
The U.S. Navy method is accurate within 1-3% for most people. The BMI-based method is less accurate as it does not account for muscle mass. For the most accurate results, consider a DEXA scan or hydrostatic weighing.
What is a healthy body fat percentage?
For men: 10-20% is fitness range, 14-17% is ideal. For women: 18-28% is fitness range, 21-24% is ideal. Essential fat (below which health risks increase) is 2-5% for men and 10-13% for women.
How do I measure for the Navy method?
Waist: measure at the navel level, relaxed. Neck: measure just below the larynx (Adam's apple). Hip (women only): measure at the widest point of the hips. Use a cloth tape measure against bare skin.