Home / Normal Body Mass Index

Normal Body Mass Index

normal body mass index

BMI Classification (International Standard)
As we can see here, a BMI of 26.41 would fall into the Overweight category. The following graph will show the varying BMI values depending on height and mass. Notice that people with different height and mass may have the same BMI.

Body mass index (BMI) is a value derived from the mass (weight) and height of a person. The BMI is defined as the body massdivided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres.


The BMI may also be determined using a table or chart which displays BMI as a function of mass and height using contour lines or colours for different BMI categories, and which may use other units of measurement (converted to metric units for the calculation).

The BMI is a convenient rule of thumb used to broadly categorize a person as underweightnormal weightoverweight, or obesebased on tissue mass (muscle, fat, and bone) and height. That categorization is the subject of some debate about where on the BMI scale the dividing lines between categories should be placed. Commonly accepted BMI ranges are underweight: under 18.5 kg/m2, normal weight: 18.5 to 25, overweight: 25 to 30, obese: over 30.

BMIs under 20.0 and over 25.0 have been associated with higher all-cause mortality, increasing risk with distance from the 20.0–25.0 range. The prevalence of overweight and obesity is the highest in the Americas and lowest in Southeast Asia. The prevalence of overweight and obesity in high income and upper middle income countries is more than double that of low and lower middle income countries


The interest in an index that measures body fat came with observed increasing obesity in prosperous Western societies. Keys explicitly judged BMI as appropriate for population studies and inappropriate for individual evaluation. Nevertheless, due to its simplicity, it has come to be widely used for preliminary diagnoses. Additional metrics, such as waist circumference, can be more useful.

The BMI is universally expressed in kg/m2, resulting from mass in kilograms and height in metres. If pounds and inches are used, a conversion factor of 703 (kg/m2)/(lb/in2) must be applied. When the term BMI is used informally, the units are usually omitted.

BMI provides a simple numeric measure of a person’s thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients. BMI was designed to be used as a simple means of classifying average sedentary (physically inactive) populations, with an average body composition. For such individuals, the value recommendations as of 2014 are as follows: a BMI from 18.5 up to 25 kg/m2 may indicate optimal weight, a BMI lower than 18.5 suggests the person is underweight, a number from 25 up to 30 may indicate the person is overweight, and a number from 30 upwards suggests the person is obese. Lean male athletes often have a high muscle-to-fat ratio and therefore a BMI that is misleadingly high relative to their body-fat percentage.

Normal weight ranges: Body mass index (BMI)

Body mass index, or BMI, is a way to help you figure out if you are at a healthy weight for your height. BMI is a number based on your weight and height. In general, the higher the number, the more body fat a person has. BMI is often used as a screening tool to decide if your weight might be putting you at risk for health problems such as heart disease, diabetes, and cancer.

BMI is used to broadly define different weight groups in adults 20 years old or older. The same groups apply to both men and women.

most accurate BMI about Healthy:


Body Mass Index (BMI) is a measure of relative mass based on one’s height and weight. Originally named the Quételet Index after Belgian astronomer, mathematician, statistician and sociologist Adolphe Quételet.


Of months the measurements that are used in it are ( treatment body mass or body mass index ) (BMI)

a mathematical formula dependent on the height, weight and more measurements common Ashle

Treatment of body mass or body mass index (BMI)=Weight in kilograms / (height in meters)X (height in meters)

normal body mass index

most accurate BMI about Healthy:

Body mass index is a measure of the relationship between weight and height. It is very easy to calculate the body mass index.

Is first, weight and height measurements, and then matching the results on your table calculates the body mass index. And by knowing the ideal body mass index you can determine a healthy weight for anyone to have the same height and physical you have.

Treatment body mass index:
Body mass index = weight in kilograms/square of height in meters
Should be the ideal body mass index between 18.5 and 25.

Body mass index less than 18.5
If your BMI is less than 18.5 it means that weight less than you should, and check with your doctor to address this topic.

normal body mass index

Knowing your weight and height is enough to calculate your body mass index.

most accurate BMI about Healthy:

Body mass index of 18.5-24.9
If the BMI ranges between 18.5 and 24.9, the result here is perfect.

Body mass index of 25-29.9
The result here means that you have overweight, you need to take steps to reduce the excess weight.

Body mass index of 30-40
This means that you are suffering from obesity, must take steps to reduce the excess weight. It is known that obesity is one of the risk factors that may cause cardiovascular disease and other.

Body mass index of 40 or more
This result means obesity and increases weight seriously. If the result is high like this, you urgently need to see a specialist to reduce your excess weight.

Is BMI the best measure of obesity?

Firstly, it is a quick and easy way of working out whether you are in the healthy category by using two simple measures – weight and height.

Most doctors say it is the best method they have, it’s pretty accurate, can be measured simply in clinic and is acceptable to patients.

Does BMI actually measure fat?

It can’t measure how much excess fat we have in our bodies – as opposed to muscle and bone – because that would require some pretty complicated and expensive medical procedures, which just aren’t practical to carry out on the whole population.

What it does do is give a healthy weight range for a particular height, taking into account variations in body shape – and it provides a good starting point for the majority of people.

It also doesn’t measure how fat is distributed throughout the body (some fat is ok; too much in the wrong place is

a risk).

Research shows that people who carry a lot of fat around their waists are at higher risk of health problems than those with more fat around their thighs and buttocks.

They are more likely to have fat stored in their abdomen around key organs, which could increase the risk of heart disease, stroke and type 2 diabetes.

So waist size may be a better way to monitor your health than BMI. That’s why our calculator included an option for giving your waist size too.

How to measure your waist

  • find the bottom of your ribs and the top of your hips
  • wrap a tape measure around your waist midway between these points
  • breathe out naturally before taking the measurement

Regardless of your height or BMI, you should try to lose weight if your waist is:

  • men – 94cm (37ins) or more.
  • women – 80cm (32.5ins) or more.

We asked five experts: is BMI a good way to tell if my weight is healthy?

Staying a healthy weight can be a challenge, and knowing what weight is healthy for you can be too. Most people rely on the body mass index, or BMI, which is a measure of our weight in relation to our height.

Many experts have criticised this fairly limited measure of the health of our weight, yet it still remains the most popular way for most people to judge a healthy weight.

We asked five experts if the BMI is a good indicator of a healthy weight.

Modified body mass index

Within some medical contexts, such as familial amyloid polyneuropathy, serum albumin is factored in to produce a modified body mass index (mBMI). The mBMI can be obtained by multiplying the BMI by serum albumin, in grams per litre

Optimized with PageSpeed Ninja