body mass index BMI calculations ranges for underweight, healthy, overweight and obesity

Body Mass Index BMI For Obesity


BMI of 30.0 or more is considered obese according to the BMI Obesity Range for Adults. (According to WHO)


All the BMI ranges of Underweight, Healthy, Overweight and Obesity for adults are as follows:

BMI BMI Ranges
18.4 and Below Underweight BMI
18.5 – 24.9 Healthy Weight BMI
25.0 – 29.9 Overweight BMI
30.0 and Above Obese BMI

So the BMI obesity ranges are from 30.0 and Above. It means that a person having a BMI of 30.0 and above is basically Obese.


If you do want to calculate your BMI first, then you can use our BMI calculator. This BMI Calculator is designed and used by CDC (Centers for Disease Control & Prevention, America)



What is BMI?


what is bmi and how to calculate bmi body mass index
Standard Categories & Ranges For BMI


If you want to understand the BMI for obesity, you must know about Body Mass Index (BMI) first.

For those who do not know what BMI is, let me fill you in. It is a calculation that summarizes the percentage of one’s weight to his or her height. It is based on a person’s height and weight and is commonly used by many health organizations and researchers. If you want to know more about what BMI is, then read our blog post on how to calculate bmi.


Is BMI a Correct Measure of Obesity?


The main problem with using BMI is that it has been widely used; hence, it is often used to define obesity. And BMI is also a standard health criterion to join Pakistan Army or any other Armed Forces around the World. Therefore, BMI is a very important concept and application in today’s world.


Because of this, many researchers have questioned whether BMI is the most accurate way to determine obesity. Other researchers have pointed out that there may be some problems with the way BMI is calculated.

Some studies have shown that overweight people may be healthy, whereas those underweight may risk developing diseases such as diabetes and heart problems.


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BMI For Obesity


Many people believe that specific guidelines should be used when determining whether a person is underweight or obese. For example, some researchers do believe that certain points must be there when defining obesity. As there are various factors that can affect your BMI, including your gender, age, genetic predisposition, physical activity level, and body fat percentage.


We know that the prevalence rates of BMI obesity depend on many different factors. However, the underlying basis for classifying these obesity rates is a measure of both the severity and frequency of obesity. In essence, the classification involves assigning a numeric value to each attribute of an individual based on the information provided by a patient’s medical records. This involves subjective judgment and numerical interpretation of data, making it challenging to determine whether the patient meets the predefined definition of BMI obesity.


Several factors contribute to the accuracy of the BMI for obesity definition. The primary factor is the reliability of the source of the data. Most medical databases come from governmental organizations or research institutions that governmental organizations fund. Therefore, these databases contain data that are most likely to yield accurate results. However, these databases may also be biased due to partiality, the potential for which may vary according to the funding source.


Another problem inherent in the use of BMI for obesity is its over sensitivity and under sensitivity. Given this sensitivity, some BMI ranges are overinflated when compared with other similar categories. On the other hand, some BMI ranges understated the probability of obesity compared with different similar types.


Final Thoughts


Well, using the Body Mass Index (BMI) to determine whether a person is obese or not is not enough. It can only be a guide, a reference or a rough estimation.

You can use the BMI calculator to know about your BMI.

But using the Body Mass Index to determine whether someone is obese does not give an accurate assessment of the level of obesity, as it only considers the weight and height of an individual, and it cannot respond to the same degree of fatness among different individuals.


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