Body Fat Calculator

Precision measurement using the U.S. Navy Method. Tracking body composition is a more accurate indicator of fitness progress than weight alone.

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Input Metrics

male MALE female FEMALE

HEIGHT (CM)

WEIGHT (KG)

WAIST (CM)

NECK (CM)

HIPS (CM) — FEMALE ONLY

monitor_weight

Estimated Body Fat

— %

Comparison Scale

ESSENTIALATHLETICFITNESSAVERAGEOBESE

LEAN MASS — kg

FAT MASS — kg

DATA PRECISION

Why the Navy Method?

Developed by the U.S. Navy Personnel Research Center, this algorithm is widely considered the gold standard for tape-based body fat estimation. While not as precise as a DXA scan, it provides a consistent baseline for tracking long-term body composition changes with minimal equipment.

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No expensive equipment
Requires only a flexible measuring tape.
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Consistent tracking
Eliminates fluctuations caused by water weight in traditional scales.
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Proven formula
Validated by research and used by military fitness programs worldwide.