Body mass index, or BMI, gives an indication of your body size.
BMI is calculated using your weight and height (your weight divided by your height squared). Along with several other factors, like your blood pressure and cholesterol, BMI can help estimate your risk of a heart attack or stroke.
BMI has several limitations though and isn’t accurate in some people. Your GP and an Accredited Practising Dietitian can help you to achieve and maintain a healthy weight.
Last updated17 January 2025
Last reviewed19 November 2024