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Body Fat Percentage Calculator

Estimate body-fat % with the U.S. Navy tape method from a few measurements.

Built by the ZelsawCalc team · Medically reviewed by Dr. Ryan Patel, MD · Updated July 2026

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Measure your neck and waist (plus hip for women) to estimate body fat.

This tool is for general informational and educational purposes only and is not medical advice. It does not diagnose, treat, or replace care from a qualified professional. Always consult a physician or other qualified healthcare provider about your individual health.