Body Fat Calculator

Estimate body fat percentage from circumference measurements using the U.S. Navy method, with the BMI-based Deurenpeng formula as a cross-check. Reports fat mass, lean mass, and an ACE category. Choose metric or U.S. units. Everything runs locally; nothing is uploaded.

Height

Neck

Waist

Hip

Weight

Age

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Enter measurements.

Category	% range

Navy method uses circumference measurements; the BMI formula (Deurenpeng) needs weight, height, age, and sex. Estimates are heuristic — for clinical measurement use calipers or DEXA. Runs locally.