BMI Calculator - Body Mass Index This BMI calculator is an effective tool to know whether you are overweight, underweight , or just right. Your weight alone doesn't suffice to tell the difference, since an impressive, slim person could be more than a woman who is short and slim. Body mass index or BMI provides an answer to this issue by finding a ratio that is a comparison of your weight and height and calculating the same number. This number is a perfect choice for a classification in the BMI intervals, which are classified as underweight normal overweight, obese and underweight. To work out your body mass index by yourself, and to know what this number means to you, you'll have to be aware of the following: How to calculate BMI. Normal BMI. What the various BMI ranges are. What is the best way to calculate BMI Let's look at the formula: Then divide your body weight (in kgs) with your length (in inches). Dividing the result...