Body mass index

The body mass index (BMI), is the measurement that compares a person's weight and height to determaine the overall shape of the individual. The body mass index calculation does not actually measure the percentage of total body fat, but it is a tool used to estimate what is considered a healthy weight based on a person's height.

Controversially, the body mass index is the most widely used body weight diagnostic tool. It is primarly implemented to identify obesity problems, although the body mass index is an accurate represenation of weight compared to height, it is not considered accurate to determaine obesity and general body health.

The Body mass index is calculated by divinding your body weight by the square of your height. The formula is universally expressed as kg/m2.

Are you overweight or underweight?

Work out your BMI with our BMI calculator, or take a look at our BMI chart, also known as a height and weight chart to see which zone you fall into.

The body mass index relates to both men and women however, its use should only be used as a guide to your ideal weight.  It’s also important to realise the BMI height weight chart isn't a suitable guide to your healthy weight if you are pregnant, young or elderly, or if you have developed muscle mass.

The body mass index was invented in the mid 1900s by a man named Adolphe Quetelet during his research of social physics.

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