What BMI range is considered healthy?

Adults: 18.5–24.9 is normal weight. Below 18.5 is underweight, 25–29.9 is overweight, 30+ is obese. BMI alone is not a full health assessment.

Does BMI work for athletes?

Not well. Muscle weighs more than fat, so athletes often show high BMI despite being fit. Use body fat percentage instead.

Use pediatric BMI percentiles, not the adult formula. This tool is designed for adults 18+.

Both. Toggle between kg/cm (metric) and lb/ft (imperial) — the result is always calculated correctly.

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What BMI range is considered healthy?: Adults: 18.5–24.9 is normal weight. Below 18.5 is underweight, 25–29.9 is overweight, 30+ is obese. BMI alone is not a full health assessment.
Does BMI work for athletes?: Not well. Muscle weighs more than fat, so athletes often show high BMI despite being fit. Use body fat percentage instead.
Does BMI work for children?: Use pediatric BMI percentiles, not the adult formula. This tool is designed for adults 18+.
Metric or imperial?: Both. Toggle between kg/cm (metric) and lb/ft (imperial) — the result is always calculated correctly.