Body Fat Percentage Calculator (Body Fat %)

Estimate your body fat percentage using the U.S. Navy Method. This simple tool uses a few body measurements to give you insight into your fitness and body composition.

Body Fat Calculator Form

Unit System:

Gender:

Age (years):

Height (cm):

Neck circumference (cm):

Waist circumference (cm):

Hip circumference (cm):

How It Works

The U.S. Navy formula estimates body fat based on circumference measurements:

Men: Neck, Waist, Height
Women: Neck, Waist, Hip, Height

* Always measure in centimeters (cm). For best results, take measurements in the morning before eating or exercise.

Example

Male - Age: 30, Height: 175 cm, Neck: 40 cm, Waist: 90 cm

Estimated Body Fat ≈ 20.6%

Female - Age: 28, Height: 165 cm, Neck: 34 cm, Waist: 75 cm, Hip: 95 cm

Estimated Body Fat ≈ 26.4%

What Does It Mean?

10–20% = Lean/Fit (men)
20–30% = Healthy (women)
30%+ = High body fat / consider weight loss

* Imperial values (inches) are automatically converted to cm for internal calculation.