Body Fat Calculator

US Navy (girth) method & BMI estimate. Choose units, enter measurements, and calculate percentage, fat & lean mass.

Sex Male Female

Age (years)

Units Metric (kg, cm) Imperial (lb, in)

Weight

Height

Neck circumference

Waist circumference

Hip circumference (female)

Method

US Navy (girth) BMI Estimate

Notes: US Navy formula requires neck & waist for men; neck, waist & hip for women. BMI estimate formula uses BMI + age + sex. These are estimates — for clinical measurement consult a professional.