Medically reviewed by Suzanne Fisher, RD Key Takeaways Body mass index (BMI) is a calculation used to estimate your body fat.

BMI, also referred to as Body Mass Index, is a method used in screening one’s body fat. This is done by measuring the height and weight of a person and converting it into their equivalent BMI.

Add Yahoo as a preferred source to see more of our stories on Google. For these reasons as well as the influence of environmental, hormonal, and mental factors, “your body size is not a very good ...