What is a BMI Calculator?

A BMI calculator is an online or offline device that measures your body mass index.
The body mass index or BMI is a measure of how much body mass you have in relation to your height and weight.
Body mass refers not only to the fat within your body but also to muscles and bones.
It is calculated by taking your weight and dividing it by the square of your height.
The BMI figures let you know whether you are within the normal weight range, or if you are underweight or overweight.
Both high BMIs and low ones are known to raise a host of health problems, especially as you age.
However, a high BMI in itself is not always, medically speaking, a cause for alarm. It should be viewed in conjunction with other health parameters.