However, your BMI may vary if you are pregnant, muscular or aged. So, if you are above the age of 20 and your BMI is either less than 18.5 or higher than bmi 30, then you are probably underweight or overweight. As per this table by the world health Organisation, the ideal BMI for an individual irrespective of gender range between 18.5 and 25. The table given above is for any adult above the age of 20 years. So, while height is the main factor for analysing body mass, the gender of the person also matters. Now, if you are comparing your normal bmi range with a person of another gender, then the same will vary again. You can check the exact bmi index in the chart above according to your weight and height. On the other hand, you being the taller one, you are still not obese like your friend as your BMi is somewhere around 27-28. This means, even though your friend is lower weight than yours but her bmi index is higher at bmi 30 (approximately) as her height is short. Suppose you have a height of 5’7” while your friend is 5’. You need to consider the height as well to analyse whether you two are overweight or not. It may feel at first instance that you are overweight but that is not the right approach. Suppose, you and your friend went for a weight measurement and found out that you are weighing 80 Kg while your friend is weighing 70 kg. Let’s take an example to understand this better.

Gaining weight doesn’t necessarily mean that a person is becoming overweight. BMI or Body Mass Index or bmi index can be referred to as a metric to measure or evaluate whether a person’s body weight is accurate according to that person’s height or not.

Bmi calculator for women with age