Body Fat Calculator

US Navy body fat estimate from measurements.

Units

Sex

Age (optional) (years)

years

Height (cm)

Height (ft)

Height (in)

Weight (kg)

For fat / lean mass & BMR

Weight (lb)

For fat / lean mass & BMR

Neck (cm)

Just below the larynx

Neck (in)

Just below the larynx

Waist (cm)

Navel (men) / narrowest (women)

Waist (in)

Hip (women) (cm)

Widest point

Hip (women) (in)

Frequently asked questions

What does the Body Fat Calculator do?

US Navy body fat estimate from measurements. Enter your values and get an instant estimate in your browser — free, with no signup.

Is the Body Fat Calculator free to use?

Yes. OpenCalcy calculators are free to use, work on mobile, and keep favorites privately in your browser.