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health.body-fat Calculator
Estimates body fat percentage using the US Navy method from neck, waist, and hip circumferences (and height), which correlates well with DEXA at typical body compositions. Navy method accuracy is ±3–4% for most people — DEXA is the gold standard but costs ~$100.
Inputs
Waist Cm
Waist circumference. Elevated waist circumference is a risk factor for metabolic disease independent of total weight.
Neck Cm
Reference formula or conversion factor shown for context.
Height Cm
Vertical measurement. For health calculators, typically standing height without shoes.
Hip Cm
Reference formula or conversion factor shown for context.
Results
body fat
The value at the specified point or condition.
fat category
The classification bucket this result falls into based on the computed value and the applicable reference scale.