Body Fat Calculator

US Navy body fat percentage from neck, waist and hip measurements.

Biological Sex

Height (cm)

Weight (kg)

Neck (cm)

Waist (cm)

Body fat

14.5%

Fitness

Fat mass11.6 kg

Lean mass68.4 kg

175 available

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About this calculator

US Navy body fat estimate from height, neck, waist (and hips) tape measurements with gender-specific categories, fat and lean mass.

How accurate is the Navy method?

Within ~3–4% of DEXA for most people when measurements are honest and consistent.

Where to measure the waist?

At the navel, relaxed, tape horizontal — same spot every time.

What is a healthy percent?

Roughly 18–24% for men and 25–31% for women is the average range; athletes sit lower.