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

As an editor and writer who has contributed to many national and local publications, Nicole Gregory enjoys communicating clearly on critical health topics so that readers can make informed choices for ...

Body Mass Index, or BMI, is a number that reflects the relationship between your height and weight. It's widely used in health care and public health to categorize body size and estimate potential ...