Body mass index (BMI)
From Longevity Wiki
Body mass index (BMI) is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m2, resulting from mass in kilograms (kg) and height in metres (m). The BMI is expressed in kg/m2, resulting from mass in kilograms and height in metres. If pounds and inches are used, a conversion factor of 703 (kg/m2)/(lb/in2) is applied.
BMI = masskg/height2m2 = 703 x masslb/height2in2