For instance, the BMI of a person who is 5’3" and weighs 125 lbs is calculated as follows:Multiply the weight in pounds by 0.45 (the metric conversion factor)125 X 0.45 = 56.25 kg 2. Multiply the height in inches by 0.025 (the metric conversion factor)63 X 0.025 = 1.575 m 3. Square the answer from step 21.575 X 1.575 = 2.480625 4.Divide the answer from step 1 by the answer from step 356.25 : 2.480625 = 22.7 The BMI for a person who is 5’3" and weighs 125 lbs is 22.7 or practically, 23. BMI(BODY MASS INDEX) is used as a screening tool to indicate whether a person is underweight, overweight, obese or a healthy weight for their height.
