Body Fat Percentage Calculator (Navy Method)
Calculate your body fat percentage using the U.S. Navy circumference method
About this calculator
The Body Fat Percentage Calculator using the U.S. Navy Method provides an accurate estimate of your body fat percentage through simple circumference measurements. This scientifically-validated method was developed by the U.S. Navy as a practical alternative to expensive body composition testing equipment. Unlike BMI calculations that only consider height and weight, this method accounts for body shape differences by measuring specific body circumferences. It's particularly useful for fitness tracking, health assessments, and monitoring body composition changes over time without requiring specialized equipment or professional testing.
How to use
Measure your neck circumference at the narrowest point and waist at the widest point (men) or waist and hips (women) using a flexible measuring tape. Enter your measurements along with height, weight, age, and gender into the calculator. The tool will instantly compute your body fat percentage using the Navy's proven mathematical formula.
Frequently asked questions
How accurate is the Navy body fat calculator?
The Navy method is typically accurate within 3-4% of professional body composition tests like DEXA scans, making it reliable for general fitness tracking.
Why do men and women use different measurements?
Men and women store fat differently. Women require hip measurements because they typically store more fat in the hip area than men.
What's considered a healthy body fat percentage?
Healthy ranges are typically 10-22% for men and 20-32% for women, varying by age and fitness goals. Athletes often have lower percentages.