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What Is Bmi

What Is Bmi | Body Mass Index

 

What is body mass index (BMI)? And how is it calculated?

Body mass index (BMI), also known as Quetelet's index is an index used by health professionals amongst others to find a healthful body weight for humans based on the ratio of their bodies' weight to the square of their height. That means that a healthful weight is directly related not only to your weight but also to your height. For example, If you are 6 feet tall and you weight 200 pounds, you are considered to have a healthful body weight. However, if you weigh 200 pounds, but you are only 5 feet tall, you are not.

To have a healthful body weight, your Bmi index value should fall between 18.5 and 30. Anything outside this range is considered unhealthy. Your body mass index offers an essential clue to your state of health. Scientific studies have shown that a person's risk for type two diabetes, elevated blood pressure, cardiovascular disease as well as other health conditions increase largely when the body masss index is over the value of 30. On the flip side, having a really low Body mass index, understood to be a value below 18.5, is likewise connected with higher potential for health conditions and even loss of life.

Now to answer the second question from the top of the page, we can calculate the body mass index by using the following formula:

BMI= weight (kg)/ height (m)²

Where 1 kilogram is equivalent to 2.2 pounds, and 1 meter is equivalent to 3.28 ft.

Let us use the example we mentioned earlier to find out the body masss index of a six feet man tall weighing 200 pounds, and the body mass index of a 5 feet tall man weighing 200 pounds. First we convert 200 pounds to kg, we get 90.90kg, then we convert 6 ft to meters we get 1.83 meters, and the square value of 1.83 would be 3.35, finally we convert 5 feet to meters we get 1.52 meters, and the square value of 1.52 is 2.31, now we can fill in the values in the equation.

BMI of the 6 feet tall man is: 90.90/3.35 = 27.12

BMI of the 5 feet tall man is: 90.90/2.31 = 39.35

As you can see from the results, the BMI value of the 6 feet tall man falls within the healthy range (between 18.5 and 30), while the BMI of the 5 feet man does not (above 30).


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