The FitScience Body Fat Estimator — a fast, easy, and scientifically-backed tool to body fat calculator for your body fat percentage using the U.S. Navy Method. Designed for lifters, athletes, and fitness enthusiasts, this calculator uses key measurements like neck, waist, height, and (for women) hips to deliver a reliable estimate of your body composition in seconds. With accuracy within ±3–4% of clinical methods, it’s a powerful tool for tracking progress, planning cut/bulk cycles, and optimizing your physique. No calipers, no guessing — just real data to fuel real results.
