Body Mass Index (BMI ) is a measurement of a person’s weight with respect to his or her height. It is more of an indicator than a direct measurement of a person’s total body fat. Body mass index ( BMI ) is a value derived from the mass (weight) and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m 2, resulting from mass in kilograms (kg) and height in metres (m). What is the full form of BMI ? The full form of BMI is Body Mass Index. It is a method of measuring through which individuals are classified into the following categories: obese, overweight, normal weight and underweight. It’s the proportion of your weight in kg (kilogram) to the square of your height in m (meters). People who have high BMI have much more body fat or weight for their height. The calculation method of BMI One must have two parameters to measure the BMI : the height of a ... Body mass index ( BMI ) is a screening tool based on your body weight. It’s calculated by dividing your weight in kilograms by your height in meters squared. BMI isn’t an accurate measurement of body composition. So it provides a limited view of your body fat or your overall health.