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About the Body Fat Calculator
This calculator estimates your body fat percentage using the measurement method you select. You enter your numbers and receive an estimated body fat percentage you can track over time.
For tape measurements it applies the U.S. Navy circumference method, which uses height, neck, waist, and hip for women, along with age and sex. In skinfold mode it converts caliper readings in millimeters with standard Jackson-Pollock equations. In bioelectrical impedance mode it works from an impedance value. Take each measurement at the same time of day and repeat it once to reduce error.
- Choose your measurement method: tape, skinfold, or bioelectrical impedance.
- Enter your age, sex, height, and weight, then add the required measurements.
- Read your body fat percentage and compare it with standard fitness ranges.