Body Fat Calculator (US Navy Formula)

Calculate your body fat percentage using the US Navy method. Input your height, waist, neck, and hip circumference (for females) to estimate your body fat percentage. This calculator is designed for adults and runs entirely in your browser - no data is sent to any server.

Male

Female

Height (cm)

Waist Circumference (cm)

Neck Circumference (cm)

Hip Circumference (cm) — Required for females

Category	Men	Women
Essential Fat	2-6%	10-13%
Athletes	6-14%	13-21%
Fitness	14-18%	21-25%
Average	18-25%	25-32%
Obese	>25%	>32%

The US Navy body fat formula is a method developed by the US Navy to estimate body fat percentage. It uses measurements of height, waist, neck, and hip (for females) to calculate body density, which is then converted to body fat percentage. It is more accurate than BMI for reflecting body composition, offering a good balance between simplicity and accuracy.

Healthy body fat ranges: Men 14-18%, Women 21-25%. Athletes typically have lower ranges (Men 6-14%, Women 13-21%). Above 25% (men) or 32% (women) is considered obese. Body fat percentage varies with age, gender, and exercise habits.