A body mass index (BMI) formula is a tool used to calculate an individual’s BMI, a measure of body fat based on height and weight. For instance, a person weighing 150 pounds and standing 5 feet 9 inches tall would have a BMI of 23.9.
BMI is widely used in medical settings and health research to assess nutritional status and potential health risks associated with body weight, such as obesity and underweight. Its development in the 19th century marked a significant advancement in the field of human body measurements.