Please note the following. Der Body Mass Index (BMI) Calculator offers a first approach to weight control, which, however, has only limited significance. shorter people are classified as overweight with a higher proportion of muscle mass often, while leaner people, who eat unhealthy (Fatty degeneration of the body) are classified as overweight ideal. Therefore, it is recommended to use other measurement methods such as e.g.. the bioelectrical impedance analysis with electrodes, the DEXA scan, hydrostatic weighing, or infrared measurements.