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🧍 Body Fat Calculator

Estimate body fat percentage with the US Navy method using height, neck, waist, and hip measurements, then get a quick, private result for fitness tracking.

Body Fat Calculator

Estimate your body fat percentage using the US Navy circumference method. Enter your measurements in centimeters.

Sex

Height (cm)

Neck (cm)

Waist (cm)

16.9%

Fitness

This is an estimation. For medical accuracy, consult a professional.

Why track body fat?

Monitor progress when strength training or pursuing a weight loss programme.
Compare results against general health guidelines tailored to your sex.
Pair the estimate with circumference data in fitness apps or coaching plans.

Measurement tips

Use a flexible tape and measure first thing in the morning for the most consistent results.
Record values to the nearest 0.5 cm—tiny differences can shift the calculation noticeably.
Re-run the calculator monthly and store the copied output to chart trends over time.

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