Body Fat Calculator
Estimate your body fat percentage using the US Navy method
What is Body Fat Percentage?
Body fat percentage is the proportion of fat mass relative to total body weight. Unlike BMI, which only considers height and weight, body fat percentage provides a more accurate picture of body composition by distinguishing between fat mass and lean mass — including muscle, bone, organs, and water. Tracking your body fat percentage over time helps you assess changes in body composition more effectively than weight alone.
This calculator uses the US Navy method, which estimates body fat percentage using circumference measurements at key body landmarks. Developed by the U.S. Navy, this method is widely used for its simplicity and reasonable accuracy — requiring only a measuring tape and basic measurements. While not as precise as DEXA scans or hydrostatic weighing, the US Navy method offers a practical and accessible way to estimate body fat percentage at home.
The American Council on Exercise (ACE) categorizes body fat ranges to help interpret your results. These ranges account for biological differences between males and females, as women require higher essential fat for reproductive health. Use your body fat percentage as one of several indicators of health and fitness, alongside other metrics like strength, endurance, and overall well-being.
Disclaimer: This calculator is for informational purposes only and is not a substitute for medical advice. Always consult a qualified healthcare provider before making decisions about your health.