Body mass index (BMI)

  • Height

  • Weight

Calculate your BMI

Body Mass Index

The body mass index (BMI) is used as a screening tool to indicate whether a person is underweight, overweight, obese or healthy. It uses your height and weight to assess where you stand.

If a person's BMI is out of the healthy BMI range, their health risks may increase significantly.

What’s BMI?

BMI compares your weight to your height, and is calculated by dividing your weight (in kilograms) by your height (in metres squared). It gives you an idea of whether you’re 'underweight', a 'healthy' weight, 'overweight', or 'obese' for your height. BMI is one type of tool to help health professionals assess the risk for chronic disease. Another important tool is waist circumference. It is also important to understand your other risk factors.

Waist measurement

Waist circumference is a simple check to tell if you are carrying excess body fat around your middle.

Where your fat is on your body can be an important sign of your risk of developing ongoing health problems. Carrying excess body fat around your middle is more of a health risk than if weight is on your hips and thighs.

Did you know?

The Quetelet Index was devised by Adolphe Quetelet, a Belgian mathematician, astronomer and statistician, in 1832. It was later termed "body mass index" in 1972 by Ancel Keys.

One must keep in mind that factors such fat percentage and muscle mass are not accounted for in BMI. But a higher BMI is a fairly good indicator of a higher fat percentage.

BMI values are age-independent and the same for both sexes.