💪 FitnessUS Navy Formula

Body Fat Calculator

Estimate your body fat percentage using the US Navy circumference method and the BMI method. See your fitness category and ACE body fat guidelines.

Sex

Units

Height

Neck Circumference

Waist Circumference (at narrowest)

Weight (for BMI method)

💪

Enter your measurements

The US Navy method needs height, neck and waist. For women, also hips.

Body Fat Categories (ACE Guidelines)

Category	Men	Women
Essential Fat	2-5%	10-13%
Athletes	6-13%	14-20%
Fitness	14-17%	21-24%
Average	18-24%	25-31%
Obese	25%+	32%+

Note: Body fat calculators provide estimates only. DEXA scans and hydrostatic weighing are the most accurate clinical methods. Consult a healthcare professional for precise measurement.