How To Calculate Body Mass Index

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How To Calculate Body Mass Index
How To Calculate Body Mass Index

Video: How To Calculate Body Mass Index

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Among the various ways to calculate your ideal weight, the calculation of the body mass index, or, as it is also called, the Quetelet index, is probably one of the most reliable and convenient. The advantage of this method is not only that it shows what your condition is at the moment, but also allows you to accurately determine the scope of the optimal weight, taking into account the individual physique.

How to calculate body mass index
How to calculate body mass index

It is necessary

  • - calculator;
  • - note paper;
  • - pen or pencil;
  • - scales.

Instructions

Step 1

Calculating your body mass index is not difficult at all. You just need to stock up on a calculator, a piece of paper and a pencil. In addition, you need to know your height in meters and weight in kilograms. If you are not sure about their exact values, measure them again. Always weigh yourself barefoot, preferably in the morning after waking up and with a minimum of clothing.

Step 2

In order to measure your height, you can use the jamb of any door. Take your shoes off and lean your back against it tightly so that your heels, calves, back, and the back of your head are touching the surface of the jamb. Then ask someone else to put a piece of heavy paper on your head and make a pencil mark on the jamb. Then measure the resulting height - you will get your height in centimeters.

Step 3

To calculate your BMI, divide your weight in kilograms by your height squared in meters. If you had difficulties with mathematics at school and it is difficult for you to imagine this formula, just divide your weight by your height in meters, and divide the resulting figure again by the same height. For example, your height is 168 cm and your weight is 55 kg. Take a calculator and divide 55 by 1, 68, and then again by 1, 68. You get: 55: 1, 68: 1, 68 = 19, 4869. Round up to the second digit after the decimal point and get 19, 5. According to with the Quetelet index, your weight is at the lower limit of the optimal one and you do not need to lose weight at all.

Step 4

When calculating BMI (body mass index), a coefficient in the range from 19.5 to 24.9 is considered the norm. A result below this figure is excessive thinness. If the coefficient is from 25 to 27, 9 is overweight, 28-30, 9 - first degree obesity, 31-35, 9 - second degree obesity, 36-40, 9 - third degree obesity. If the indicator is more than 41, this is fourth degree obesity, which requires urgent treatment under the supervision of a doctor.

Step 5

Using the inverse formula, you can easily calculate the lower and upper bounds for your optimal weight. To calculate the lower limit, the height in meters squared, multiply by the index 19, 5. The resulting number is your optimal minimum weight in kilograms. Height squared x 24.9 is the upper limit of your optimal weight.

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