Calculate your exact Body Fat Percentage, Lean Body Mass (LBM), and Fat Mass accurately using tape measurements based on the official U.S. Navy Fitness Formula.
Log your body measurements, progress photos, and body recomposition trends with our free Fasting Tracker app.
Get Free Fasting Tracker App →The U.S. Navy Body Fat Calculator uses an anthropometric formula developed at the Naval Health Research Center. It estimates body composition using neck, waist, hip, and height measurements with clinical DEXA-level accuracy (within 3-4%).
Studies show it correlates within 3% to 4% of DEXA scans, outperforming basic BMI which cannot distinguish muscle from fat.
Men: horizontally at belly button level. Women: at the narrowest point of the waist midway between the lower rib and hip bone.
Yes! Intermittent fasting triggers growth hormone (HGH) surges and preserves muscle mass when combined with adequate dietary protein.
