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bmi Calculator

BMI Calculator


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Download BMI Calculator App for Your Mobile, So you can calculate your values in your hand.

android app

A general and smart bmi calculator helps to calculate bmi or body mass index for men, women, teen, and Childs and also corresponding weight status according to given inputs. Bmi calculation becomes easy with this calculator for bmi, this tool shows you whether you are in healthy zone or need to lose excess flab or gain weight. 

Remember that bmi ranges may vary depends on your exercise regime. More you gain weight more will be the body mass index (BMI), but it doesn’t mean that you are obese it may be because of high muscle also.

Give a read to this post to understand what is bmi (body mass index), bmi formula for calculating bmi, bmi chart, scale, range, classification for men and women (adult), and child and teen, and all you need to know about the term of BMI.

Did You Know!

Our accomplished team members provided you with smart and easy ways for performing bmi calculations. In fact, the calculator-online offers you reliable and accurate bmi calculator for all (men, women, teens, and child).

Means, at this page we categorized this calculator for bmi’s into the 4 main populations groups: men and women (adult), kids and teenagers. For each of them, you can try the above general calculator for bmi to get precise figure of your body mass index (BMI). Get all in one at this site page!

  • BMI Calculator For Men
  • BMI Calculator For Women
  • BMI Calculator For Teenagers
  • BMI Calculator For Kids (Children)

So, before knowing about these all calculators for BMI, let’s begin with some generic terms!

What is BMI and Global Health Observatory (GHO) data?

The BMI or Body Mass Index is a statistic that developed by Adolphe Quetelet in the first half of the 19th century for determining body fat. It uses the same bmi equation for male as female and kids.

By simple definition of bmi, a BMI or Body Mass Index is an essential measurement that helps you to monitor whether you are healthy, normal, overweight or obese. According to National Institutes of Health (NIH), Body Mass Index is a prestigious indicator that assists you to track body fat, and these fats are highly related to the risk of death and disease. You can calculate BMI with the ease of body mass index calculator online, and the entire calculation is based on your height and weight, you can enter your weight either in pounds (lbs) or kilograms (kg), and height in feet and inches or centimeters. 

Weight can be entered pounds, stones and pounds, or kilograms. Height can be entered in inches, feet and inches, meters, or centimeters.

Global Health Observatory (GHO) data & BMI:

Situation and BMI Trends:

Minimum 2.8 million people estimated die each year worldwide who are prone to overweight or obese, and also it is estimated that 35.8 million (2.3%) of global DALYs (disability-adjusted life years) are caused by overweight or obesity. Study found that overweight and obesity lead to adverse metabolic effects on blood pressure, cholesterol, triglycerides and insulin resistance. Also, experts depict that risks of coronary heart disease, ischemic stroke, and type 2 diabetes mellitus increase steadily with increasing BMI. Remember that increased body mass index also raises the risk of cancer of the colon, breast, prostate, endometrium, kidney, and gall bladder. The GHO data depicts that mortality rate increase with increasing degrees of overweight, as determined by BMI.

If an individual want to achieve optimum health, then it is suggested that the median body mass index for an adult population should be within the range of 21 to 23 kg/m2, while the aim for individuals must have to be maintain healthy or normal bmi range 18.5 to 24.9 kg/m2. There BMI range 25.0 to 29.9 is associate with the risk co-morbidities and even moderate to severe risk of co-morbidities for BMI greater than 30 BMI range. So, try bmi calculator for adult (male and female).

Prevalence of obesity (Doubled):

In 2008, 35 percent of adults aged 20+ were overweight (BMI ≥ 25 kg/m2) (34% of men & 35% of women). Between 1980 and 2008, prveleance of obesity becomes doubled worldwide. In 2008, 10% of men (adult) and 14% of adult women around the globe were obese (BMI ≥30 kg/m2), compared with 5 percent of adult men and only 8 percent for adult women in 1980’s.The estimations found that around 205 million men and 297 million women over the age of 20 were obese – even a total of more than half a billion adults around all over the globe.

Prevalence of Overweight and Obesity (WHO Regions):

Yes, in the WHO regions of the Americas, the prevalence of overweight & obesity were highest, it is (62% are overweight in both male and female, and 26% for obesity) and the lowest in the WHO Region for South East Asia (14% overweight for both male & female and 3% for obesity). In the World Health Organization Regions including Eastern Mediterranean, Europe, and the Americas over 50 percent of women were overweight. For these three Regions of WHO (World Health Organization), roughly estimations are indicated as the half of overweight women is obese (23% in Europe, 24% in the Eastern Mediterranean, 29% in the Americas). In all World Health Organization Regions women were more likely to be obese than men. Women had roughly double the obesity prevalence of men in all the WHO regions for Africa, Eastern Mediterranean and South East Asia.

bmi overweight percentage

Studies depicted that the prevalence of increased BMI raises with income level of countries up to upper middle income levels. Also, the prevalence of overweight is double in the countries in which the high income and upper middle income than the countries in which low and lower middle income. When it comes to obesity, the difference becomes more than triples from 7 percent obesity in both men & women in lower middle income countries to 24 percent in upper middle income countries. The epidemic of obesity was significantly higher in women’s than men’s, with the exception of countries with high income where it has been similar. When it comes to low & lower middle income countries, approximately the obesity among women was double that among men.

Now, let’s take a look at the bmi formula for (adults) men and (adults) women.

What is BMI Formula and How to calculate it?

Here is the bmi calculation formula that helps you in calculating bmi, swipe down!

English BMI Formula:

For Pounds & Inches:

BMI = Weight (lb) / (Height (in))² x 703

When you considering English measurements or the above bmi equation, pounds should be divided by inches squared. And then, this should be multiplied by 703 to convert from lbs/inches² kg/m²

Metric BMI Formula:

For Kilograms and Meters (or Centimeters):

BMI = Weight (kg) / [Height (m)]²

The above bmi equation is demonstrated weight in kg divided by height in meters squared. If your height has been measured in centimeters, then you ought to divide it by 100 to convert this to meters.

Our bmi calculator for women and men also uses these above formulas to evaluating your bmi or body mass index. Account any one of the above formula to evaluate whether you have a healthy bmi or overweight, underweight, or obese.

How to Calculate BMI?

BMI Examples:

Calculate BMI With English BMI Measurement:

An example of calculating bmi by using the English system for the equation is:

What is my bmi, if:

  • My Weight is 150 lbs
  • My Height is 5’5” (65 inches)

Let’s put the value into the English formula for bmi:

BMI = 150 / (65)² x 703

So, your BMI is 24.96.

Calculate BMI With Metric BMI Measurement:

An example of calculating BMI using the metric measurement for the formula is:

Let’s take a look at an example of calculating body mass index by using the metric measurement for the formula:

Whats my bmi, if:

  • My Height is 165 cm (1.65m)
  • My Weight is 68 kg

Now, you ought to plug-in the values into the metric formula for body mass index:

BMI = 68 / (1.65)²

So, your bmi is 24.98

In general, once you determined your Body Mass Index measurement, you can easily find out if you’re at the risk for BMI Related Disease. Our bmi calculator female and male also uses the same body mass index formula to calculate body mass index for men and women.

Risks of being (high BMI) Overweight & Physically Inactive:

If you’re overweight with a BMI or Body Mass Index over 25kg/m2 and physically inactive, you may develop:

  • Cardiovascular (disease of heart and blood circulation)
  • Gallbladder disease
  • High blood pressure (Hypertension)
  • Type 2 diabetes
  • Osteoarthritis
  • Types of cancer like a colon and breast cancer
  • Certain mental health disorders and depression

Risks of being underweight (low BMI):

If you’re underweight, means your bmi less than 18.5kg/m2, you may be malnourished and develop:

  • Respiratory disease
  • Digestive disease
  • Digestive diseases
  • Cancer
  • Osteoporosis
  • Compromised immune function

BMI Calculator For All Ages (Men, Women, Kids, Teenagers):

BMI Calculator For Men:

Body Mass Index calculator male is a smart tool that calculate bmi men and corresponding weight status while taking the age & weight into consideration. With this body mass index calculator for men, you can obtain more precise data on what’ normal bmi for men!

No doubt, BMI is the factor that assists adult men to understand their overall health, plug-in the values into this calculator to determine your BMI weight status category.

BMI Calculator For women:

Bmi calculator female is smart tool that calculate bmi women and corresponding BMI weight status category in which women fall. BMI women help to judge whether women weight fall in healthy weight category or not. Account this, body mass index calculator for women to know whether you have a healthy BMI for women, or an obese BMI!
Researcher depicted that having a higher bmi can leads to several health problems!

Bmi calculator for kids:

The child bmi calculator is the tool that helps you to calculate BMI for kids and the corresponding BMI for age percentile depends on the CDC growth charts for children (over the age of 2). Because of all the possible rounding errors in age, weight, and height, the outcomes from this bmi percentile calculator may slightly differ from BMI-for-age percentiles calculated within other ways!

The U.S Preventive Services Task Force currently recommends the routine monitoring of Body Mass Index (BMI) in all children over the age of two. This calculator will provided you with CDC BMI chart for kids.

BMI Calculator for teens:

The teen bmi calculator is specifically designed to calculate bmi for teenagers based on clinical growth charts. This bmi percentile calculator not only tells bmi for teens, but also whether teen’s bmi falls into an underweight, healthy weight, overweight, or obese range. However, with this bmi calculation for teen you will better understand how teen’s weight and body fat contribute to current and future health.

So, it does not matter in which age you are, this calculator will assists you to find out Body Mass Index or BMI for all ages.

How do I calculate My bmi Using BMI Calculator:

Want to know bmi for adult men and women, kids, and teenagers, all you need to plug-in the values into the body mass index calculator, it tells you what is the normal bmi for your age and in which one of bmi categories you fall in.

This calculator for bmi is 100% free, all you need to stick to the given steps to perform bmi calculations.

Calculate BMI For Adult (Men & Women):


  • First of all, you have to select the “Adult” men and women option from the field of this bmi calculator for male and female
  • Very next, you have to select “Male” if you want to calculate body mass index for men, and select “Female”, if you want to calculate body mass index for women
  • Then, you have to plug-in your height into the designated field of this calculator for bmi adults, it can either be in feet and inches (ft/in) or centimeters (cm)
  • Now, you have to put your weight into this tool, it can either be in pounds (lbs) or kilograms (kg)


Once you entered into the above fields, this adult bmi calculator for female and male will generates:

  • Your BMI
  • Classification of Weight Status by Body Mass Index (BMI)
  • In which one of BMI Categories you fall in
  • Why BMI Matters
  • Healthy BMI Range
  • Ponderal Index
  • Body Mass Index or BMI Table
  • Body Mass Index or BMI Chart

Body Mass Index is not only the factor that examine your overall health status, after getting the result, this calculator will allows you to measure waist to height ratio.

Calculate BMI for Kids & Teens:


  • First of all, you have to select the “Child & Teen” option from the field of this tool
  • Then, you have to select the “Boy” if you want to calculate BMI for child/teen boy, and select “Girl” if you want to calculate BMI for child/teen girl
  • Very next, you have to enter the “age” into the designated field
  • Now, you have to plug-in the value of “height” into the designated box of this tool, it can either be in ft/in or cm
  • Finally, you have to add you weight into the designated field of this calculator to find bmi for teens or kids


Once you filled all the above fields, this calculator for bmi  children and teenagers calculator will generates:

  • Your Child or Teen BMI
  • BMI-for-age percentile growth charts (Teen and Child Bmi Chart)
  • In which one of BMI Percentile categories you fall in
  • Healthy Weight Range
  • BMI Percentile

This calculator will provides you with precise BMI calculations, and helps to understand what is a healthy bmi range for children or teenager corresponding to their age, gender, and weight.

Well, read on to know the bmi categories and explain the classifications!

How is BMI interpreted for adults (Body Mass Index Categories)?

For adults 20 years old and older, BMI or Body Mass Index is interpreted by using standard weight status categories. Experts depicted that the bmi scale is something that will place you in one of six categories. These categories for BMI are the same for adult men and women of all body types and ages. The given chart is shows the categories of BMI along the BMI score that associated with each category.

Classification Body Mass Index Score
Underweight less than 18.5
Normal Weight 18.5 – 24.9
Overweight 25 – 29.9
Obesity (Class 1) 30 – 34.9
Obesity (Class 2) 35 – 39.9
Extreme Obesity (Class 3) 40+

The given BMI chart allows you to find the bmi score (manually) and even includes a classification of the BMI category that you reside within.

BMI less than 18.5 (Underweight):

A lean Body Mass Index can refer to as your weight maybe too low. You should have to ahead to your MEDICAL PRO to evaluate if you should gain weight as low body mass can lower your body’s immune system, which leads to illness like:

  • Disappearance of periods (women)
  • Bone loss
  • Malnutrition
  • Other health conditions

Remember that the lower your body mass index the greater the health risks become!

Treatment For Underweight BMI:

The recommended way to add extra pound is to increase your intake of carbs, particularly who grain ones. You have to include these foods into your weight gain diet plan:

  • Whole white bread
  • Muffins
  • Pasta
  • Crackers
  • Bagels
  • Legumes
  • Fruits

When it comes to weight gain, all you need to consume more calories. Also, you have to stick to regular exercise and strength training as it prevents gaining extra pounds as fat. You have to set up realistic goals, before adopting any underweight treatment program. Remember that proper and organic nutrition is your first priority, and weight gain is the seconds.

BMI is between 18.5 and 24.9 (Normal Weight or Healthy BMI Range):

Individuals those have BMI between 18.5 to 24.9 possess the ideal amount of body weight, it not only associated with living longest, but also the lowest chances of serious illness, as well as being perceived as more physically attractive than those individuals who have BMI in higher or lower ranges. However, it is a good approach to determine your Waist Circumference and keep it within the suggested limits.

BMI is between 25 and 29.9 (Overweight BMI):

Individuals within this BMI ranges are referred to as the overweight BMI, they would get benefit by determining the healthy and legitimate ways to lower their weight, such as diet and exercise. Remember that such overweight BMI range increased the risk for a variety of illness. If an individual BMI is 27 to 29.99, then his/her risk of health problems becomes higher. Recent studies found an increased rate of diabetes, blood pressure, and heart disease was recorded at 27.8 for men and 27.3 for women. So, try the above body mass index calculator women and men to find the bmi normal range! Also, once you know your bmi overweight, consult to your health care provider!

Treatment For Overweight BMI:

In fact, the weight of an individual body is controlled by the number of calories that he/she use and consume per day. Means, if you intake fewer calories than you burn, you will shed weight within few days. To do so, all you need to stick to physical activity or consume less.

These are the very simple changes that assist to improve your chances of weight loss success:

  • Eliminate red meat
  • Cut out fried foods
  • Start with a fresh salad or a soup
  • Stop sugary beverages
  • Drink plenty of water

BMI is between 30-34.99 (BMI Obese Class 1):

People within BMI 30 to 34.99 are prone to a physically unhealthy condition that puts them at risk for serious illness such as diabetes, high blood pressure, gall bladder disease, heart disease, and certain types of cancer.

Ideally, to reach bmi healthy range, you ought to consult your health care provider and consider reducing your weight by 5% to 10%. This weight reduction is good to reach your ideal bmi for adult men and women.

BMI is between 35-39.99 (BMI Obese Class 2):

If your BMI is fall within range of 35 to 39.99, then experts depicts that the risk of weight-related health problems and even death, is severe. So, immediately consult to your MEDICAL PRO and reduce your weight to reach your good or healthy bmi.

BMI is over 40 (BMI Obese Class 3 : Morbid Obesity):

Studies depicted that if an individual have BMI of 40+, it indicates that he/she have an extremely high risk of weight-related disease and even premature death. In fact, the greatest wealth is health, so you should have to consult to your medical experts to get recommendations according to your BMI ranges!

Treatment For BMI Obese (Class 1, Class 2, Class 3):

The method of treatment is not only depends on the level of obesity, but also your overall health conditions, and even motivation to lose weight.

The treatment includes:

  • Diet
  • Exercise
  • Behavior Modification
  • Weight loss drugs (in some cases)

Also, in the few cases of severe obesity, gastrointestinal surgery may be recommended.

Remember That!

To lower your BMI, here you need to stick to slow weight loss process, means 1 to 2 pounds per week, it is said to be as the safest way to reduce excess flab. Studies found that rapid weight loss can cause you to reduce muscle rather than fat. Apart from it, your chances of developing other health related problems increases that include gallstones and nutrient deficiencies. You ought to make legitimate long-term changes in your eating and stick to physical activities to reach your weight loss goals!

It doesn’t matter whether you’re trying to reduce or maintain your weight; you should have to improve your eating habits. You have to consume a variety of foods, these includes:

  • Pasta
  • Rice
  • Whole meal bread
  • Other whole grain foods
  • Consume fresh fruits and green vegetables

You have to reduce fat intake, and avoid all the dairy products and soft (soda) drinks. Simply, stick to at least 30 minutes physical activity a day and eat healthy to reach healthy BMI range (normal weight).

BMI for Children And Teenagers:

Body Mass Index or BMI for children and teens is said to be as age-and sex specific and typically indicated as BMI for age. You can find bmi for kids and teens by using the above bmi calculator with age and other parameters. For children, a high amount of body fat can leads can leads to certain helath-issues and weight-related diseases. Being underweight can also put your kids at risk for health problems.

Remember that the BMI ranges will remain the same for adults (women and men) throughout their life, but these figures are varying in children as kids are still at growing stage & do so at different rates. As an outcome, Body Mass Index or BMI is said to be a measure of weight for height as compared to the children of the same age. This entire bmi calculation results in BMI percentile. Our bmi percentile calculator works efficiently in determining child’s and teen’s bmi according to CDC growth charts.

For example:

If a kid is 14th year old (boy), his height is 5ft 3 inches tall and weighs 120 pounds, for instance, his body mass index or bmi is 21.3, mean this put him in the 75th percentile (take a look at the above table). This body mass index or bmi is said to be he has healthy weight as the proper range is between 90 and 120 pounds.

You can try our bmi percentile calculator that shows you proper bmi percentile for age chart and tells in which percentile category your teens and children falls.

Let’s take a look at this bmi graph to get a proper idea about BMI percentiles:

bmi chart for kids

BMI Charts:

BMI charts play a crucial role in visualizing the ranges that are associated with each BMI category. Also, you can account them to locate your weight and height to calculate your bmi score and as well as the associated BMI category you fall within. Well, let’s first take a look at the bmi chart for men and women.

BMI Chart for Adults (Men & Women):

bmi chart men and women

Look at the above bmi chart for women to know in which weight category your BMI falls in.

BMI Chart for Kids & Teens (Boys):

bmi chart for kids and teens (boys)

BMI Chart for Kids & Teens (Girls):

bmi chart for kids and teens (girls)

What is a BMI percentile and how is it interpreted?

Once bmi is calculated corresponding to teens and child age, it is expressed as “Percentile”, it does not matter either it is obtained from bmi percentile graph or bmi percentile calculator for kids and teens. These percentiles are measure that is expressed a kid’s bmi or body mass index relative to U.S children; they are participated in the national surveys from 1963-65 to 1988-94. Optimistic studies depict that height and weight change during the growth and development as they both are related to body fatness. Consequently, a child’s body mass index (BMI) should be interpreted relative to the other children of the same age and gender.

In the United States (U.S), the bmi for age percentile growth charts is said to be the most typical used indicator to determine the size and growth patterns of children and teens. Our bmi calculator for children also measure kids and teenagers bmi corresponding to the bmi for age percentile growth charts.

Let’s take a look at the bmi-for-age percentile growth chart:

Weight Status Category Percentile Range
Underweight Less than the 5th percentile
Normal or Healthy Weight 5th percentile to less than the 85th percentile
Overweight 85th to less than the 95th percentile
Obese Equal to or greater than the 95th percentile

Is BMI interpreted the same way for children and teens as it is for adults?

BMI is interpreted differently for the children and teens as it is for adults. In fact, BMI for children and teens need to be age and sex-specific as the amount of body fat changes with age and the amount of body fat differs between boys and girls. The CDC or Centers for Disease Control and Prevention BMI-for-age growth charts take into account these all difference & visually demonstrate BMI as a percentile ranking.

What is the Body Mass Index Used for?

Yes, the BMI is something that was over 150 years old, some major health authorities like the CDC (Centers for Disease Control and Prevention) and National Institutes of Health (NIH) in the U.S still believe that “BMI is reliable indicator of body fatness for most people.” So, the above calculator for body mass index is taken into account to determine bmi for female and male, kids and teens.

Public Health Statistics:

Even current days, Body mass index is used as the official measure of national obesity rates. For instance, for the obesity epidemic, the Union European Union continues to use BMI as a yardstick and even suggests that individuals with higher bmi are a greater risk of diseases that includes hypertension, cancer, and cardiovascular disease.

The Harvard T.H. Chan School of Public Health depicted that your risk of developing conditions like type-2-diabetes increases progressively as your Body Mass Index rises above the range 21. The ranges of bmi kids and teens are varying, to get body mass index chart for kids and teens, simply plug-in the values into the above smart bmi tool and get the results within couple of seconds.

Weight Range Analysis:

Also, the bmi range considered to be an accurate measure of an individual weight range. Thus, if an individual have a bmi of 27, then he/she said to be overweight regardless of what he/she actually weigh and his/her body composition or gender is not taken into account.

Screening Tool for Weight Problems:

If your health care provider calculate a higher than normal BMI, then the very next step is to see if you’re at risk of certain health-related problems. In fact, the basic role of Body Mass Index or BMI is to evaluate whether you’re likely to develop a serious medical problem later in your life.

For instance, in France, BMI is work as a screening tool for child malnutrition. The CDC bmi chart for kids and teen and the BMI scale is said to be an effective means of determining whether the teenagers and children are healthy weight, underweight, overweight, or obese.

Fashion Industry:

When it comes to fashion’s industry, there obsession with exceedingly thin models has ensured that the Body Mass Index calculator for women is the tool that has a permanent home there. The fashion industry is continually under fire for forcing females, typically, to achieve what the UK Women’s Equality party calls “yes, an unattainable level of thinness in females” The party has invited on all the models with a Body Mass Index below 18.5 to be seen by a medical PRO from an accredited list who will decide if than female is enough health to work!

Additionally, there is a law to that has impact in Israel where man and woman models with a BMI below the 18.5 much get a medical certificate of confirming a ‘normal’ BMI reading. For instance, you can take a look at the Kate Moss (one of the most famous models ever), she only had a BMI of just 15 at the height of her fame. By any evaluation, including Body Mass Index, Kate was severely thin!

Global BMI Statistics vs. USA:

No doubt, Body Mass Index or bmi measurements are varying around the world and only few nations have greater ‘obesity’ problems than others according to the bmi scales. Let’s take a look at the global bmi scores, here we are going to complied statistics from 6 regions globally. First of all, here you come to know about the average body mass of individuals in different continents expressed in KGs or kilograms:

Region Average Body Mass (KGs)
Asia 57.7 kg
Africa 60.7 kg
Latin America / Caribbean 67.9 kg
Europe 70.8 kg
Oceania 74.1 kg
North America 80.7 kg
Global Average 62.0 kg

From the above-average body mass KGs Asians people are significantly lighter than Americans while they’re tool shorter on average; it is evident that individuals in North America have a higher BMI figure! Also, try this bmi calculator kg to attain average body mass KGs measurements!

BMI Statistics in USA:

The United States (U.S) has the highest Body Mass Index average around the globe behind Kuwait. America’s 28.8 averages is just behind Kuwait’s 29.5 and even said to be a major problem in the American society.

Average BMI of American Males:

Studies depict that American males have the second highest average Body Mass Index around the globe with 28.5, slightly behind the “Argentina” which is number 1 at 28.7.

Average BMI of American Females:

In the United States, the average bmi of females is even higher than in makes at 29.0 although disturbingly, there are different nations those with higher averages that including Kuwait, Trinidad and Tobago, and Egypt.

Obesity Rates in the USA:

In the USA, estimates for obesity varies but according to the World Obesity Federation (the platform from where we have gleaned obesity statistics from every country on the list), around 41.5 percent of women aged 20 plus were obese, and only 37.9 percent adult males.

Possible Limitations of the BMI:

BMI is said to be a useful tool for determining healthful weight, but experts have depicted uncertainty about BMI’s reliability. Remember that when it comes to analyze body fat, BMI is not an accurate measure!

  • Body Mass Index measures overall nutritional status corresponding to relation of height and weight. However, no mention of body fat percentage or muscle mass
  • Also, BMI is not something that distinguish water weight, bone mass etc
  • BMI is not specific to sex of an individual. For instance, Body Mass Index of female and male is same whereas male contains more muscle mass & female has more fat mass which is not mention in Body Mass Index or BMI Chart

Other Body Fat Measurement Methods:

You can find different methods of assessing the percent of fat and lean mass of a person. These are the methods that said to be as a body composition analysis. Well, some of the most common measurements are mentioned below:

  • Underwater weighing: This procedure is also referred to as hydrodensitometry, no doubt, this method is complex and enough complicated, so it is rarely used
  • Skinfold thickness measurements: This is the method that is taken into account by many experts as this is the simplest method to determine body composition
  • Bioelectrical impedance: The one of the most common methods of assessing body fat percentage that assists to determine total body weight, muscle mass, the percent and amount of body fat, water, and even bone mass. Remember that the readings can be affected by hydration level and different other factors, they fairly provide accurate results over time.

BMI Stages of Development:

Remember that regular BMI cannot accurately indicate the state of an individual’s health at some stages in life.
These are:

  • Pregnancy and Breastfeeding
  • Childhood and Adolescence, (while an individual is still growing)

That’s the reason why bmi calculations are varying for children and teens. These are the measurements that take age and gender into account to calculating bmi. Our bmi percentile calculator also shows the results in percentile CDC growth charts according to age and gender of your child’s or teens.

Also, norm can vary among individuals of certain races and ethnicities.

Making BMI Accurate:

The (NHLBI) or National Heart, Lung, and Blood Institute depicts that an assessment of weight and health risks should incorporate three key measures, these are:

  • BMI
  • Waist Circumference
  • Risk factors for diseases and conditions associated with obesity (Class 1, 2, 3)

Waist circumference:

If fat accumulates around the waist rather than the hips, an individual may have a higher risk of heart disease & type-2 diabetes.

The Centers for Disease Control and Prevention (CDC) reveals that this risk increases with a waist size greater than 35 inches for non-pregnant females or greater than 40 inches for men!

To measure the waist:

  • You ought to place a tape measure around the middle, or just above the hip bones and the navel
  • You have to take the measurements just after breathing out

Weight, obesity, and health risks:

The given information are adapted from the (NHLBI) or National Heart, Lung, and Blood Institute, which may assists indicate the risks associated with Body Mass Index or BMI and waist circumference.

The given chart provides you with the weight categories that are corresponding to BMI, and the along with the effects of higher waist circumference on the risks of cardiovascular disease, hypertension, and type 2 diabetes.

Classification BMI (kg/m2) Obesity class




Men 40 inches or less

Women 35 inches or less

Men: 40 inches or more

Women: 35 inches or more

Underweight 18.4 or less      
Healthful weight 18.5–24.9      
Overweight 25.0–29.9   Increased risk High risk
Obesity 30.0–34.9 I High risk Very high risk
  35.0–39.9 II Very high risk Very high risk
Extreme obesity 40.0+ III Extremely high risk Extremely high risk

Also, the following issues can increase the risk of developing heart disease, for instance:

  • High Blood Pressure (Hypertension)
  • High Levels of low-density lipoprotein (“bad”) cholesterol
  • low levels of high-density lipoprotein (“good”) cholesterol
  • high levels of triglycerides
  • high blood sugar levels
  • A family history of early heart (cardiovascular )disease
  • physical inactivity
  • cigarette smoking
  • a high consumption of alcohol

A MEDCIAL PRO will recommend that an individual consider losing weight if they:

  • have a BMI of 30 or greater
  • have a BMI of 25–29.9 plus two or more risk factors

FAQ’s (Body Mass Index or BMI):

What should my BMI be for my age?

You can take a look at above CDC bmi interpretation chart or use the adult bmi calculator for men and women to know what is a normal bmi corresponding to your age!

What is the best bmi for a woman?

The BMI measurements are varying in every woman:

  • A BMI of less than 18.5 indicate that a woman is underweight
  • A BMI of between 18.5 and 24.9 is indicate ideal bmi for a woman
  • A BMI of between 25 and 29.9 is indicate a overweight BMI for a woman
  • A BMI over 30 is indicates obese BMI for a woman

Furthermore, use the above calculator to understand what is a healthy bmi for women and men!

Is a bmi of 26.6 good?

An individual with a BMI of 26 to 27 is about 20% overweight, which is generally believed to associate moderate health risks. A Body Mass Index or BMI of 30 and higher is said to be obese. Remember that the higher the BMI (Body Mass Index), the greater the risk of developing health-related issues.

What is Ponderal Index?

The Ponderal Index Corpulence Index is said to be a measure of a leanness of an individual that is calculated as relationship between mass and height. In 1921, by Swiss physician Fritz Rohrer, it was the first proposed as the “Corpulence measure” and also known as Rohrer’s Index.

What is a good bmi for all ages?

The first thing is that there is no any specific figure of good bmi, everyone has different BMI number! Simply, plug-in the values into the above bmi calculator for women, men, child, and teens to know your ideal or healthy bmi range!

Is a BMI of 17.5 bad or what is the ideal bmi?

The ADA (American Dietetic Association) reveals that the ideal BMI as between 20 to 25. Therefore, anyone below that range referred to as underweight and people with a BMI from 18.5 to 17.5 are extremely underweight.

Does BMI actually matter?

BMI is the measurement that has been used to give an idea about whether people are overweight or underweight for over 100 years. Simply, it divides a person’s weight by their height (squared). A body mass index or BMI of between 18.5 and 24.99 is said to be as healthy, but some individuals are healthy with other BMIs range!

Should I worry about my BMI?

Optimistic studies reveal that having an unhealthy Body Mass Index (BMI) is associated with the health problems that linked with obesity. For people, simply determining your Body Mass Index or BMI is not something that gives you a complete picture of your health.

What is a normal bmi?

There is no any “normal bmi” figure as everyone is different, but a Body Mass Index or BMI of less than is said to be as healthier.

What BMI is considered morbidly obese?

A Body Mass Index or BMI of 40 or being 100 pounds overweight with health-related problems that constitutes being morbidly obese.

My height 60 inches and weight is 40 kg. What is my BMI?

  • First of all, you should have measurements all in metric or all in imperial
  • 60 inches equals 1.5 meters (60 x 0.025)
  • Now, you have to square that number for your height, so 1.5 x 1.5 = 2.25
  • Very next, you have to divide your weight by your height that would be 40 kg/2.25 m² equals 17.7
  • So, 17.7 is your BMI

What is a normal bmi for men?

Under 25 is indicated as a healthy BMI for men! You can also calculate normal bmi range for men by using the above calculator for BMI men.

How do I calculate my BMI as a kid if I know my height and weight?

There is not any rocket science behind it, if you are a kid, just plug-in the values into our smart bmi calculator for kids, to calculate your child bmi’s.

What do I do if my BMI is high, but I’m underweight?

If your BMI is high, but you are underweight, then it’s likely that you may have performed wrong bmi calculations. You ought to consult to your MEDICAL PRO if you are unsure.

How to maintain a healthy BMI?

Remember that maintaining a healthy BMI takes some work, stick to the following steps, it doesn’t matter whether you’re a starter or on the way:

  • You have to exercise at least 60 to 90 minutes most days of the week
  • Stay hydrated and consume a balanced diet is essential for maintaining a healthy BMI
  • If your BMI is not where it should be, then you may have to reduce your caloric intake and also increase your exercise

When to Consult Medical Pro:

If your Body Mass Index or BMI score is outside of a healthy range, then it’s time to call a your health care provider. Also, you may need to consult to your dietician to achieve your health goals.


The calculator-online makes no claims of the accuracy of the published information and also the results that you get from the above calculator. The results of this tool are just estimations and intended for educational purposes only. The information and result from this tool are not intended to substitute for MEDICAL professional advice, diagnosis, or treatment.


From Wikipedia, the free encyclopedia – History (BMI) – Body Mass Index (BMI) Categories – Children (aged 2 to 20) – International variation (BMI) – Relationship to health and Limitations

The source of ncbi recently updated – PMID: 16189499 DOI: 10.1038/sj.ijo.0803117 – Body mass index or BMI of healthy men compared with healthy women in the United States (US)

Legitimate information from the source of webmd – What Is a Healthy Weight – Body Mass Index – Bmi to figure out the estimated healthy weight – BMI Formula

Get the ease with the livestrong – What Is a Normal BMI for Children -Charting and Comparing BMI – Calculating Your Child’s BMI – Know the Disease Risks – Understanding the BMI Numbers – Pay Attention to Low Numbers


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