The free BMI calculator determines the so-called body mass index adult. The freeware allows users to calculate with a few mouse clicks, whether they are prone to under- or overweight. In the surface of the German-speaking Freeware give users basic personal data as a basis for calculation. In addition to age and sex of free helper requires only the current weight and the body size of the user to determine the personal BMI. After clicking on the button "To calculate" BMI calculator calculates the individual BMI value and also determines the personal ideal weight. With the free BMI calculator Windows users calculate below their personal body mass index. The free helper provides meaningful evidence of an objective assessment of its own weight.