BMI calculator
Calculate your body mass index from your height and weight, in metric or imperial units, with the standard adult categories.
Enter your height and weight to see your BMI.
Runs in your browser. Nothing you enter is sent anywhere.
Good to know
BMI is weight in kilograms divided by height in meters squared. It’s a quick screening number, and the categories above are the standard ones for adults.
BMI doesn’t measure body fat directly or account for muscle, age, sex or ethnicity, so it’s a starting point for a conversation with your clinician — not a diagnosis.