Adult BMI thresholds don't apply to teenagers. The CDC uses age- and sex-specific percentile charts because kids grow at different rates.
Under 5th percentile: underweight. 5th–85th: healthy. 85th–95th: overweight. 95th+: obese.
Your pediatrician plots the numbers on a growth chart — that's the source of truth, not adult BMI.
Sleep, protein at every meal, daily movement, and family meals drive lifelong outcomes far more than teen dieting.
Adults 18+ can use our target-zone tool.
Quick Target Weight →
BMI can label muscular athletes as overweight or obese. Here's when BMI misses the mark and what to use instead.
The clearest waist guideline for women, based on the NHS and Ashwell Waist-to-Height ratio — no charts, just one rule.
How age changes your healthy weight range, and the simple WHO/CDC formula that answers "how much should I weigh?".