Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method, which uses circumference measurements.

Sex

Height (cm)

Neck Circumference (cm)

Measure just below the larynx (Adam's apple)

Waist Circumference (cm)

Measure at the navel (belly button) level

Hip Circumference (cm)

Measure at the widest point of the hips/buttocks

Your Results

How It Works

This calculator uses the U.S. Navy body fat formula, which estimates body fat percentage from circumference measurements of the neck, waist, and (for women) hips, along with height.

Formula (men): 495 / (1.0324 − 0.19077 × log₁₀(waist − neck) + 0.15456 × log₁₀(height)) − 450

Formula (women): 495 / (1.29579 − 0.35004 × log₁₀(waist + hip − neck) + 0.22100 × log₁₀(height)) − 450

References: U.S. Navy. NAVPERS 15909C: Physical Readiness Program. Hodgdon JA, Beckett MB. Prediction of percent body fat for U.S. Navy men and women. NOSC Technical Report TR 84-29, 1984.

Disclaimer: This calculator is for informational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider before making health decisions.