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🧍 Body Fat Calculator

Estimate body fat percentage using height, neck, waist (and hip). Quick, offline.

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.

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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