Body Fat Calculator

Estimate your body fat percentage and lean mass using the scientifically recognized US Navy method.

Measure at navel level.
Measure below larynx.
Body Fat Percentage 18.5% Fitness
Fat Mass 33.3 Pounds (lbs)
Lean Body Mass 146.7 Pounds (lbs)

The US Navy Body Fat Method

The US Navy Method is an established algorithm used to estimate body fat percentage without expensive clinical equipment. It relies on the relationship between circumference measurements and total body volume.

  • How to Measure: For the most accurate results, use a soft tape measure. Ensure the tape is level around your body and tight enough to stay in place, but not so tight that it compresses the skin.
  • Body Fat Categories (Male):
    • Essential Fat: 2-5%
    • Athletes: 6-13%
    • Fitness: 14-17%
    • Average: 18-24%
    • Obese: 25%+
  • Body Fat Categories (Female):
    • Essential Fat: 10-13%
    • Athletes: 14-20%
    • Fitness: 21-24%
    • Average: 25-31%
    • Obese: 32%+

Medical Disclaimer: This calculator provides estimates based on circumference formulas. Factors such as extreme muscle mass (bodybuilders) or specific medical conditions may cause inaccurate results. Body fat percentage is only one metric of health. Consult with a healthcare professional before making significant changes to your diet or exercise routine.