Body composition metrics turn height, weight and waist measurements into useful screening numbers: BMI for the population-level screen, body fat percentage to account for muscle, and waist ratios to flag central adiposity. The Composite Health Index folds the four most useful metrics into one 0-100 score.
BMI Calculator
CDC adult categories and healthy weight range.
Composite Health Index
One 0-100 score for BMI + waist + body fat, with radar chart.
Body Fat Calculator
Navy-method body fat estimate.
Waist-to-Height Ratio
Central adiposity screening (0.50 threshold).
Waist-to-Hip Ratio
WHO central-obesity thresholds.
Four-Metric Comparison
BMI vs waist vs body fat side by side.
Lean Body Mass
LBM estimate from height and weight.
Ideal Body Weight
Hamwi / Devine reference formulas.
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All tools provide educational health metric estimations only — not medical advice, diagnosis, or treatment.