Let us first see what BMI is, its significance and current relevance. Thereafter also study other different indices to measure health of a person.(1)BMI: Body Mass Index (BMI) is a person's weight in kilograms (or pounds) divided by the square of height in meters (or feet). For example if body weight of a person is 95 kg and height is 5 feet and 9 inch equal to 1.75 meter.BMI= 95/1.75×1.75=95/3.06=31.04BMI is 31.04Category:Obese BMI is 31.1 indicating person weight is in the Obesity category for adults . BMI is a screening measure and is not intended to diagnose disease or illness.