Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy method from waist, neck, and height measurements.
What Is the Body Fat Percentage Calculator?
The US Navy body fat formula estimates body composition from waist, neck, and height measurements (plus hip for women). It correlates well with more accurate DEXA scan measurements.
Formula
How to Use
Enter your gender, height, neck circumference, and waist circumference. Women also enter hip circumference. All measurements at natural relaxed positions.
Example Calculation
Male, 180cm tall, 85cm waist, 38cm neck: Body fat ≈ 20%. This falls in the 'Fitness' category (18-25% for men). A naval officer would ideally be below 22%.
Understanding Body Fat Percentage
Body Fat Percentage Calculator is a free online tool that helps you solve real-world problems instantly. Whether you are a student, professional, or curious learner, this calculator provides accurate results with clear explanations.
Our tool uses proven mathematical formulas and algorithms to deliver precise calculations. All computations happen in your browser — no data is sent to any server.
Bookmark this page for quick access whenever you need to perform body fat percentage calculator calculations.
Frequently Asked Questions
How accurate is the Navy method?
Within ±3-4% of DEXA scan results for most people. It is less accurate for very lean athletes and obese individuals.
Where do I measure waist?
Measure at the navel for men. For women, measure at the narrowest point of the torso.
What are healthy body fat percentages?
Essential fat is 2-5% (men) or 10-13% (women). Athletes: 6-13% / 14-20%. Fitness: 14-17% / 21-24%. Average: 18-24% / 25-31%.