Calcolo BMI

The Body Mass Index (BMI) is one of the most widely used screening tools in modern preventive medicine. By dividing your weight in kilograms by the square of your height in meters, it produces a single number that broadly categorises your weight status — whether underweight, healthy, overweight or obese. While BMI is not a perfect diagnostic tool and does not account for muscle mass or body fat distribution, it remains a valuable first checkpoint endorsed by the World Health Organization and the NHS alike.

Understanding your BMI is most meaningful when combined with other health metrics. For example, after you calculate your BMI here, visit our Calorie Calculator to discover how many calories your body genuinely needs each day based on your weight, age and activity level. The two tools together give you a far more actionable picture of your health than either can alone.

It is also worth noting that BMI should always be interpreted alongside lifestyle factors. Our Daily Water Intake Calculator can help you determine the optimal hydration level for your body weight — a factor that directly influences both metabolism and weight management. Small, consistent changes informed by data are the cornerstone of lasting well-being.

Cos'è l'IMC e come si calcola?

L'Indice di Massa Corporea si calcola dividendo il peso in chilogrammi per il quadrato dell'altezza in metri: IMC = kg ÷ m². L'OMS definisce quattro categorie: Sottopeso (sotto 18,5), Normopeso (18,5–24,9), Sovrappeso (25–29,9) e Obesità (30 e oltre). La formula fu sviluppata dal matematico belga Adolphe Quetelet nel 1832.

Perché l'IMC da solo non basta

L'IMC non distingue tra massa grassa e massa muscolare. Per una valutazione completa si combina con la circonferenza vita (rischio elevato oltre 88 cm nelle donne e 102 cm negli uomini). Il nostro Calcolatore di Calorie e il Calcolatore di Idratazione completano la valutazione.