Body Fat Calculator - LeanFuel

Most protein calculators use your total body weight — so at 220 lbs, they tell you to eat 220g of protein a day. That's wrong, and you know it. LeanFuel uses the U.S. Navy Method to calculate your actual body fat percentage from simple tape measurements. Then it gives you a protein target based on your lean body mass — the muscle you actually need to fuel. HOW IT WORKS 1. Enter your measurements (neck, waist, height, weight) 2. Get your body fat %, lean mass, and fat mass instantly 3. Receive a personalized daily protein target 4. Log your protein and hit your goal every day SMART PROTEIN TARGETS Your target adjusts based on your fitness goal and activity level: - Build Muscle: higher protein to fuel muscle growth - Lose Fat: extra protein to preserve lean mass in a deficit - Maintain: moderate protein for steady body composition - Recomp: optimized for simultaneous fat loss and muscle gain TRACK YOUR BODY RECOMPOSITION - Body fat % over time (watch it go down) - Lean mass over time (watch it go up) - Protein target history with each measurement - Real body recomp data — not just the scale DAILY PROTEIN LOGGING - 100+ built-in foods with verified protein values - Quick-log in one tap or add your own custom foods - Track daily grams vs. your target - Watch your protein ring fill up throughout the day STAY MOTIVATED - Earn XP for logging, hitting targets, and measuring - Level up through 15 ranks from Beginner to Recomp Master - Unlock 19 achievement badges for streaks and milestones - Maintain daily log streaks and target streaks BUILT FOR YOUR LIFESTYLE - Beautiful dark mode design - BMI calculator included - Metric and imperial units - 30 languages supported - No account required — your nutrition data stays on your device Try LeanFuel free for 7 days. Then continue with a weekly ($4.99/week) or yearly ($29.99/year) subscription to unlock unlimited measurements, full charts, and all features. --- LEGAL: Privacy Policy: http://www.jakubl.com/privacy.html Terms of Use (EULA): http://www.jakubl.com/terms.html SUPPORT: support@jakubl.com X: @jakublaszczyk