Body Fat Percentage Calculator
Calculate your body fat percentage using the US Navy method with accurate measurements and comprehensive analysis
Body Fat Calculator
Ready to Calculate
Enter your measurements to calculate your body fat percentage and get health recommendations.
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How to Use the Body Fat Percentage Calculator
Choose Your Measurement Units
Select between metric (cm, kg) or imperial (inches, lbs) units based on your preference. This ensures accurate calculations regardless of your measurement system.
Enter Your Personal Information
Input your height, weight, age, and gender accurately. These baseline measurements are essential for the US Navy method calculation and proper body composition analysis.
Take Precise Body Measurements
Measure your waist and neck circumference carefully. For women, also measure hip circumference. Use a non-elastic tape measure and follow proper measurement techniques for maximum accuracy.
Calculate and Analyze Results
Click calculate to get your body fat percentage, lean body mass, fat mass, and health category classification. Review the comprehensive body composition breakdown and recommendations.
Track and Monitor Progress
Use the history feature to monitor changes in your body composition over time, export your data for personal records, and observe trends in your health and fitness journey.
Body Fat and Health Tips
The US Navy method provides accurate estimates for most adults but may not be suitable for athletes with high muscle mass or extreme body types.
Body fat percentage is a better indicator of health than BMI alone, as it distinguishes between muscle and fat mass composition.
Essential fat levels are different for men (2-5%) and women (10-13%) due to physiological differences and reproductive health needs.
Regular resistance training can help maintain or increase lean body mass while reducing body fat percentage for improved health outcomes.
Body fat distribution (where fat is stored) can be as important as total body fat percentage for cardiovascular and metabolic health risks.
Consistency in measurement timing and technique is crucial for accurate tracking of body fat changes over time and progress monitoring.
Hydration levels, meal timing, and recent exercise can temporarily affect measurements - take measurements under similar conditions for reliability.
Measure at the same time of day, preferably in the morning before eating, for the most consistent and comparable results.
Use a non-elastic tape measure and apply consistent tension without compressing the skin for accurate circumference measurements.
Healthy body fat reduction should be gradual (0.5-2% per month) to preserve muscle mass and maintain metabolic health during weight loss.