Body Fat Calculators

BodyFatLab guides

Plain-language answers to body fat calculators questions, written from the same sourced data behind BodyFatLab. Every guide lists its sources and the date it was last updated.

• Updated June 10, 2026

  How does the Navy body fat measurement method work?

  The U.S. Navy method estimates body fat from height, neck, and waist tape measurements using log formulas published by Hodgdon and Beckett in 1984.

• Updated June 10, 2026

  What is a healthy body fat percentage range?

  ACE category bands put screening estimates in context: 14–20% is the athletes band for women and 6–13% for men, with average at 25–31% and 18–24%.