Body Mass Index or BMI is a body size measurement concerning your weight and height. It is more of an indicator to determine if the weight is healthy and compatible for a particular height.
In simple terms, your BMI range estimates your total body fat based on overall weight and height. The higher your BMI, the more overweight you are. However, BMI fails to tell if your overall weight is water, muscle, or fat. Therefore, you cannot consider it a diagnostic tool for body fat percentage.
Despite being used since the 1840s, the concept of bmi calculator has some drawbacks. The first problem is that BMI as a measure is not representative of all demographics. It considered data involving Europeans to determine the range.
Demography plays a role in determining optimum body weight. Also, it does not consider body fat percentage, muscle mass, or body fat distribution, which produces an inaccurate BMI reading.
BMI measure cannot distinguish between fat and muscle. Since muscle tissue is more dense than fat, the density and distribution do not reflect in BMI calculation.
For example, the high BMI reading of weight trainers and athletes show as overweight or obese, even when they’re not. Thus, muscular people can be of healthy weight even though their BMI range falls in the obese category.

Ideal BMI for Children and Teenagers
The BMI calculation is different when it comes to children and teenagers. In adults, body mass index considers weight and height only. However, the BMI interpretation uses age and gender for children and teens.
To get accurate BMI in children and young adults, the health professional considers specific percentile and growth charts. Factoring in age and gender is essential because children and teenagers tend to gain weight and grow height too slowly or too quickly. The BMI range for them is as follows.
First and foremost, the Body Mass Index is only a guide. A quick, relative index that allows us to make a rough assessment of our body weight. The calculation of the Body Mass Index only takes into account the total body weight.
The bmi calculator does not give any information about the distribution of body fat and does not distinguish between fat mass, water and muscles. Therefore, it should not only be related to age and gender. The physique, sports activities and other individual factors should definitely be taken into account.
This is especially true for children and teenagers. They are still growing, so it is difficult to determine a meaningful BMI for children. But here, too, a healthy diet in combination with sporting activities is ideal.
The German Nutrition Society recommends consuming at least 30g of dietary fibre per day from whole grain products, vegetables, legumes and fruit. In addition to whole grain cereal products, potatoes are also a possible source of carbohydrates.