This calculator should only be used by adults (pregnant or breastfeeding women should not rely on this BMI reading) and no action should be taken based on its values other than consulting a qualified person such as a doctor.
The calculator will give you an idea of how your weight compares to the general value. Body mass index (or BMI) is calculated as your weight (in kilograms) divided by your height (in meters) or BMI = Kg/M².