How Is BMI Calculated?

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BMI, or body mass index, is calculated by taking a person's body weight, multiplying it by 703 and dividing that result by the person's height in inches squared. Discover why BMI is not always an accurate gauge of body composition with help from a fitness trainer in this free video on exercises and working out.

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Video Transcript

Hi right now we are going to talk a little bit about how to calculate your Body Mass Index otherwise known as BMI. Now before you do this just keep in mind that Body Mass Index is not proven necessarily to be an accurate gage of your body composition or your overall body composition. It kind of depends on the dimensions of the person you are talking about and other factors that we won't get into. For equation's sake what you need to figure out your BMI, your Body Mass Index. You need to plug in figure into the following equation, your body weight in pounds, times, multiplied by 703 and then you divide that result by your height in inches squared. So for me would take the figures of 200 pounds and multiply that by 703 then you would divide all of that by my height which is 74 inches and you would square that or you square the 74 inches and divide those two figures. I have precalculated mine and mine came up to 25.68 rounded up to the nearest hundred. Now again as I mentioned BMI is not always an accurate gage of body composition. For my particular body I am, I have had a physical and doctors say I am in great health. Now if you go by BMI numbers I am not healthy because that 6'2" my body mass index should be lower. But again it depends on your body composition. I happen to be more lean muscle than fat so you have to take many many factors into consideration when calculating your BMI. Make sure you consult a doctor and a fitness professional to get some guidance on how to look at those figures and that is how to calculate your BMI.


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