Athletiq Calcs

Nutrition

Body Fat Percentage Calculator (US Navy)

Estimate your body fat percentage using the US Navy method from simple circumference measurements.

Sex

Age (years)

Height (cm)

Neck circumference (cm)

Waist circumference (cm)

Hip circumference (cm) — females only

Enter your measurements to estimate your body fat percentage.

Related calculators

BMI Calculator
BMR and TDEE

How it works

The US Navy method uses logarithmic equations that combine height and circumference measurements to estimate body fat percentage. It is a practical field method, not a lab-grade measurement.

How to interpret the results

Compare your result with typical ranges for your sex and age. Track changes over time rather than obsessing over a single value. Training consistency and performance trends matter more than one estimate.

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