Body mass index calculator centimeters how to#
If the height is available in centimeters, it is divided by 100 to obtain the height in meters. Use our instant online body mass index calculator to find your current BMI measurement and learn how to measure your waist circumference. Then the weight in kilograms is divided by the result (square of height in meters). The height in meters is first multiplied by itself (squared). This is called the Imperial BMI Formula.īody Mass Index is measured using kilograms and meters with this given equation:īMI = (weight in kilograms/(height in meters x height in meters)). This gross result is again multiplied by 703 to arrive at the final result which is nothing but the BMI. The weight in pounds is then divided by the result (square of height in inches). The height in inches is first multiplied by itself (squared). This is again simply possible because all that is needed is the height and weight of a person.Imperial Body Mass Index (BMI) Formula: Body Mass Index is measured using pounds and inches with this given equation:īMI = (weight in pounds/(height in inches x height in inches)) x 703 Another major reason the BMI is still used is that it has the ability to compare many groups of people and even entire countries by their BMI.
Since then it has spread across the world and has thus already has amassed a great deal of data, not just people’s BMIs’ but in scholarly articles that use the simple BMI to link it to different health problems and diseases. The body mass index was developed in the 1800’s and has been widely used after World War 2 when it was used to link body weight with cardiovascular disease. Not only that but the fact that there are many different indices and formulas for these methods, it makes comparing them more difficult as well. Since each and every health index has its limitations, the BMI is still used because it is the broadest and by far simplest index to calculate: just weight divided by height squared.Įven though different health indices exist such as Body Fat Percentage that are more accurate in predicting whether a certain person has a healthy body weight or not, the problem with those is that they require slightly more effort in obtaining the appropriate measurements for each individual. These same limitations still arise in many different health indices and frankly will always have limitations, to different degrees, because for the simple reason that every person is different and thus no single index can comprise all people. Why is the BMI still used?ĭespite all the downfalls and limitations shown above that come with the body mass index, ironically those same limitations play a role in why it is still widely used. However, if the wrist size is more or less than 7 inches, you add or subtract 10 of ideal body weight respectively. If the wrist is 7 inches, the IBW remains the way it is. Women: Ideal Body Weight (in kilograms) 45.5 kg + 2.2 kg for each inch over 5 feet. This means that for bodybuilders and very fit people, sometimes it’s better being "overweight" because to them the BMI is stating they are heavier than "normal" people, which is in fact the goal most bodybuilders want to obtain. Men: Ideal Body Weight (in kilograms) 48 kg + 2.7 kg for each inch over 5 feet. One last thing to remember is that the "overweight", "underweight" readings shown in this BMI Calculator are relative to a pre-defined average "normal" body weight. Thus it is important to take all this into account when trying to understand your BMI reading and also speak with a doctor or nutritionist before undergoing any new fitness routine or diet.
Basically the BMI assumes a "normal" body weight for men and women of average height and average fitness or activity level. It is important to note that the Body Mass Index is to be used as a general tool for determining a healthy body weight.
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