Body Mass Index Explained


Body mass index (BMI) is a calculation that compares weight against height and is commonly used as a screening tool for obesity.

The average body mass index is rising in the USA. Compared to the 1970s, a far greater number of people now fall into the obese BMI category of over 30kg/m2 ( 1 ). Between 1999 and 2018, obesity prevalence increased from 30.5% to 42.4% of the population in the USA ( 2 ).

In this article, we will explain how body mass index is calculated, what the score means, and its relevance in relation to your overall health risk.