Calcolatore BMI gratuito: strumenti online NHS e CDC

Calcolatori BMI affidabili e gratuiti:

1. NHS (UK) Healthy Weight Calculator
   https://www.nhs.uk/tools/pages/healthy-weight-calculator.aspx
2. CDC (US) Adult BMI Calculator
   https://www.cdc.gov/healthyweight/assessing/bmi/

Entrambi usano formula BMI standard (peso kg / altezza m²) e forniscono interpretazione categorie.