Calculate ideal weight by age. Body mass index (BMI) calculator. BMI norm in men: the meaning of indicators

BMI is an abbreviation for English language Body Mass Index, which translates as " body mass index". BMI is the ratio of body weight to height, which determines that a person is insufficient, normal or overweight body.

BMI is one of the important methods for determining physical condition, but, unfortunately, it is not always enough. An important addition to the body mass index is the determination of the amount of fat in abdominal cavity- too much can mean dangerous abdominal obesity, even with a normal BMI. In addition, paradoxically, studies show that people with a slightly elevated index tend to be healthier and live longer than those who have it in the normal range (have " normal weight"). There is even speculation that perhaps the WHO threshold for overweight (25) is too low.

BMI calculation

The formula is very simple:

BMI = body weight in kilograms divided by height in meters squared.
For example, for a person with a height of 1.82 m and a weight of 76 kg, the BMI will be:
76 kg: (1.82 m)² = 76: (1.82 x 1.82) = 22.9

With the Body Mass Index Calculator, it is easy to determine the presence of fat in the body. Just enter your height in centimeters and weight in kilograms.

BMI calculator online

“Health” is already a concept for medicine, and doctors have long developed a special formula by which any person can easily calculate the maximum acceptable weight in terms of health. Schoolchildren are taught this when they undergo medical examinations. The normal weight of a person and by years, ages, the table shows how much body weight changes over time.

People are both full, and thin, and average. Of course, women try to find their ideal weight and maintain it. But first you need to figure out what it actually looks like. The normal weight of a person and by years, ages, the table was developed by doctors, they look more at healthy parameters, uniform, full development, than at beauty. So, ?

• Ideal weight - where is it
• Calculation methods
• Lorenz's dream
• Quetelet index

Ideal weight - where is it

Perfect - flawless, the best, chic, beautiful. Who doesn't want to hear such compliments about themselves? Of course, girls strive more for the ideal. They watch tabloids, follow the news, involuntarily comparing their figure and famous stars.

By the way, many screen divas are constantly engaged, carefully monitor their own nutrition. why they look great at 30, 40 and even 60 years old. The figures are beautiful, fit. Of course, sometimes they resort to plastic surgery, but apart from sports, there is little that can pull up a figure. However, people have their own height, age, and 30-year-olds cannot be compared to 50 or 60-year-olds.

A person has his own ideal mass size. Doctors advise looking at growth, metabolism, health status. if you look at the very concept of “ideal weight”, then most women will answer that this is the weight that they had by the age of 17-18, young, lovely nymphs.

It is advisable, of course, to keep it later, but if you still have come off the former ideal, then you should not immediately rush into diets, starvation, in an attempt to immediately and irrevocably return there, to youth.

Scientists have proven that the body gradually slows down the internal rhythm by 8-10% approximately every 8-10 years. The metabolism decreases, the processes of natural fat burning slow down, so an increase of 5-7 kg is a normal, healthy phenomenon.

It is also necessary to lose fat, if any, gradually, focusing on those 8-10% of the already existing weight, but for a year. And for a healthy, developed figure, there is no need to remember the 18-year-old weight, but to navigate according to a simple formula known since school days:

For men: the ideal weight will turn out \u003d (factory height-100) * 1.15;
For women: the ideal weight will be = (factory height-110) * 1.15.
Then: a woman with a height of 170 cm \u003d (170-100) * 1.15 \u003d 69 kg.

In a more familiar version, the number 1.15 did not yet exist. This is an improved version. The early formula required everyone to become real fitness models, and it doesn’t matter how heavy a person’s bones are, whether they have large muscles, how pronounced a woman’s hips or breasts are. Therefore, scientists have worked a little on the formula for.

What body types currently exist:

Hypersthenics - people who have shortened arms, short legs, also a short neck, but broad shoulders.
Normostenik - most people with average speed their metabolism.

Asthenic - people whose metabolism, on the contrary, is increased, narrow shoulders, also long legs, arms.

How to identify your body type?

It is not necessary to view in a growth mirror. Right hand, using your thumb and forefinger, grasp the wrist of the second, left hand in the place where the bone is felt.

It was not possible to connect the fingers - hypersthenic;
It turned out, only with difficulty - normosthenic;
It came out easily - asthenic.

Features of formation, weight growth, of course, also depend on gender. It is believed that a man is heavier than a woman, larger than her (in the majority). This is also conceived by nature, although in humans, gender differences are not so pronounced. Women still have breasts, hips are more pronounced, while men, on the contrary, have more developed muscles. All this of course will also affect the weight.

There are many ways to determine your ideal weight.

Calculation methods

Electronic scales - they probably met such high ones, they immediately reveal growth. You need to get close to the vertical scale, barefoot, then wait a few seconds. The result is announced, in addition, the machine determines the value of the optimal weight;

Tables are ready-made, developed by doctors. Everything is reflected there: height, for men, women, and also for children, separate tables indicating the maximum ideal weight. It is enough to weigh yourself, measure your height and then find the parameters in the table;

There are tables for schoolchildren, doctors regularly measure their parameters in order to correct them if possible and monitor developmental norms. Of course, the concept of “standard” is not very applicable to adolescents, for example, boys often mature later than girls, and children of the same age are different in height, and the difference is quite large. illustrative example- any class.

This difference is visible from childhood. At 6-7 years old, children are about the same, that boys and girls, then their bodies develop, each grows in its own way. Therefore, there is no need to rely 100% only on the data of the tables. A height-weight formula is best. external indicators, dynamics of development.

As for babies, their weight is of course monitored, and the first months are almost weekly. It is important for doctors to watch the rate of weight gain, how the child eats, what problems with digestion. After all, in infants, the gastrointestinal tract system, metabolism is only getting better. The body grows and any underweight is then reflected in health.

Therefore, most parents take with a crib, diapers and other “newborn kit” also special scales with a convenient tray where the baby is placed. And tables help doctors track the dynamics of weight gain. It is believed that on a good, nutritious diet, with proper care and without problems with the gastrointestinal tract, newborns should add certain grams of weight every day.

For men own weight, of course, it is worth following, although they are not chasing the ideal so much. "Beer belly" or common big mass brings a lot of problems, especially in terms of health. constant shortness of breath, heaviness, weight always presses on the bones, spine. If the pressure is too great, they hurt, sprains often occur.

Formulas - calculation systems are easily applicable, the main thing is to know the parameters. Measure actual height, weigh yourself. And arm yourself with a calculator. Modern electronic scales are capable of measuring weight to the smallest gram, which sometimes upsets and pleases those who are losing weight. Brokk's formula has already been discussed above, this is the application of 1.15 to the result of weaning 100 from the existing growth. How else can you "fold" "divide" yourself?

Lorenz's dream

For a woman = (actual height, centimeters -100) - (actual height, centimeters - 150) / 2

Then, for example, it will be: for a woman where the height is somewhere around 165 cm = (165-100) - (165-150) / 2 = 57.5 kg will become that ideal weight!
True, such a formula is really only for women, it is not designed for the stronger sex! The value is quite expected. For 165 cm - 57 kg is normal.

Although some believe that the formula, on the contrary, is more demanding, wanting to “return” the hostess to her 18-year-old ideal weight, but for BMI (that body mass index) it is quite suitable. By the way, for women who are taller than 175cm, this formula is also not applicable, so you should be careful here. Otherwise, get 20 or 100 kg.

Quetelet index

This method is perfect for texture. The ability to assess your existing weight. Not bad! After all, most methods of measuring only for the future, suggest what you should strive for later. And here - assess the situation now. According to the method, you need not only to weigh yourself and then find the result in the table, but to find out the features of your physique.

Stand directly in front of a large, full-length mirror, pull in your stomach as you can. Then attach the two middle rulers (you can palms) to the last two lower ribs. It can be seen that they form their own angle:

Obtuse - a large physique (above 90 degrees);
Almost straight - normal;
Sharp - thin.

True, another table is required here, but this method will take into account both age and the existing body type. easy to use for any height, the main thing is to honestly evaluate the physique.
According to the index, doctors can more easily determine the actual situation. There is obesity or vice versa, underweight.

For some reason, most assume that the problem of obesity is a real evil that needs to be removed immediately. Here, the weight "left" 10-15 kg more than the maximum indicated by the table, that's it, it's time to lose weight, and urgently. Women are especially worried, although men also want to look beautiful.

Before starting any actions, you need to accurately determine the current weight, learn more about the figure, body type. Metabolism, existing diseases are already clarified by the doctor, separately. He will need, in addition to a visual routine examination, more tests.

There are individual specialists who just help people identify the problem of excess or lack of weight, then eliminate it without putting much pressure on the body at all. Indeed, in addition to obesity, there is also excessive thinness, it is also dangerous. And sometimes gaining weight becomes much more difficult than throwing it off. Removing the existing one is really easier if you know how.

The details of the measurements were studied in schools, either by the school nurse, or by the children themselves at some lesson. Girls are especially familiar with measurement systems. Waist or hips, chest volume for sewing skirts or aprons. Okay, sewing, but how do you figure out your ideal weight? After all, the growth of people is different, the metabolism is also different, the weight of the bones is also different.

The total mass, after all, is made up of not only fat:

Bone weight;
Weight of all fabrics;
Muscle weight;
Organ weight;
skin weight;
Hair weight (yes, hair has weight too, especially long hair)
A couple of grams falls on clothes;
Weight of fluid, whole, and blood and intracellular fluid and lymph, everything;
Weight of food, nutrients;
Fat weight.

Most of the % of the actual mass of any weighing person is a useful mass that can no longer be removed. Fat is 10-20% and then from the last weight gain. Those who recently gained weight or lost weight sharply had previously had one weight for many years.

Women are more likely to gain weight, for example, after childbirth. The child "takes" part of the gained kilograms with birth, the rest of the mother has to shed later herself. Some women complain that it is extremely difficult to return to the former, girlish figure. True, there are cases when mothers, on the contrary, lost weight a couple of months after giving birth, and became even slimmer than they were before pregnancy.

Doctors always attribute such “weight jumps” to hormonal changes that have occurred inside the body since the onset of pregnancy. A plus, future mom ate more high-calorie, rich in minerals, vitamins food, trying for the child. Not everything “left”, some calories “settled” with extra pounds.

The BMI was developed by the statistician and sociologist Adolphe Quetelet in the 19th century.

To calculate the body mass index, the following formula is used - body weight in kg is divided by height in meters raised to the second power.

For example, for a person of height 180 cm and weight 85 kg BMI calculation is as follows: (85/(1.8x1.8))=26

The World Health Organization (WHO) has proposed the following classification of BMI values:

• below 18.5- there is a lack of mass. Usually, a lack of mass is associated with chronic diseases, malnutrition, nervous ailments, as well as anorexia;
• from 18.5 to 25 is the normal weight. Normal body weight characterizes a healthy weight necessary for the full functioning of the body;
• from 25 to 30- excess body weight. Excess body weight increases the risk of cardiovascular disease and increases the load on all organs. With this BMI, it is advisable to stick to a diet and get aerobic exercise to bring BMI to normal values;
• over 30- obesity. Obesity can be accompanied by a whole series of diseases, such as arthritis, diabetes, various tumors. Obesity increases the risk of death from cardiovascular diseases by 30%. For the treatment of obesity and weight stabilization, you must consult a doctor.

There is also a table for calculating BMI:

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Body mass index for men and women

The above classification of BMI is not related to the gender of a person and is designed for the age of 22-45 years.

Normal body weight is characterized by a BMI of 19-24 for women and 20-25 for men.

You also need to take into account the various features of the physique. A heavily muscled person may have an “overweight” BMI, but will not be obese because muscle heavier than fat.

With age, the value of normal BMI gradually increases. BMI indicators for children differ from those of adults, because children have different body proportions, respectively, a different amount of adipose tissue.

Calculation of BMI taking into account age leads to the following results:

• The normal BMI, depending on the age in children, ranges from 15 before 18 ;
• 19-24 years old: normal BMI is 19,5 in women and 21,4 in men;
• 25-34 years: BMI is normal 23,2 in women and 21,6 in men;
• 35-44 years: The normal BMI is 23,4 for women and 22,9 in men;
• 45-54 years: BMI is normal 25,2 in women and 25,8 in men;
• after 55 years: The normal BMI is 27,3 in women and 26,6 in men.

Degrees of obesity by BMI

Index BMI over 30 talking about obesity. There are three degrees of obesity:

• BMI 30-35 speaks of the first degree of obesity;
• 35-40 - the second degree of obesity;
• over 40 - third degree.

Obesity can be the cause of many dangerous diseases. The consequences of obesity include diseases such as:

• arterial calcification;
• arthrosis of a different nature;
• blood clotting disorders, the risk of blood clots;
• high blood pressure;
• diabetes;
• metabolic disorders of a different nature;
• diseases of the cardiovascular system;
• oncological diseases of the kidneys, liver, stomach, mammary glands;
• increased susceptibility to depression.

Obesity is a condition that requires medical intervention. Obesity is treated with a strict diet, appetite suppressant drugs, psychotherapy, and regular classes sports.

Currently, BMI is rarely used to diagnose obesity and as a universal measure of physical health.

The results of recent medical studies show that obesity is not always accompanied by diseases, and underweight, on the contrary, is more dangerous to health.

According to studies, about 35% of patients with a very high BMI (more than 40) have an absolutely normal metabolism. And 8% of people with a normal BMI have metabolic problems.

As a result, this group of patients has an increased risk of getting diseases that are more common in people with obesity. In addition, scientists have discovered a yet unexplained phenomenon, which they called the "obesity paradox".

This phenomenon is that people who are overweight are less likely to die from heart disease than people who are normal or underweight.

A large-scale experiment showed that people with a BMI less than 18 are three times more likely to die from heart disease. All these data suggest that BMI, despite the simplicity of calculation, is not a correct measure of health, because when it is calculated, a large number of factors that affect human health are missed.

For example, the types of body fat, the ratio of fat and muscle, age, gender, race, hereditary predisposition are not taken into account.

The study showed that at present there is a need to develop a more accurate method for assessing the health of people, especially those who are overweight or underweight.

Many people strive to lose weight by adhering to their own ideal standards. However, in pursuit of the parameters of the figure of a top model or actress, you can overdo it and harm the health of the body. Remember that the optimal body weight of a person is always calculated individually. Therefore, it is important to calculate correct weight body. There are several formulas for this, and there is also a special weight and height calculator for men and women.

Before we talk about how to calculate the ideal weight, we note that each of us has an individual genetically predetermined value of the optimal body weight. It depends on the innate characteristics, the structure of the body. Therefore, any calculation of the norm of weight is conditional.

What determines the ideal weight of a person

Before moving on to the ideal body weight formula, it is important to understand what criteria affect the definition of a person's ideal weight. First, it is the gender of the person. A woman has a greater amount of fat by nature. Secondly, body type (normostenic, hypersthenic and asthenic). Thirdly, height and age play a significant role in calculating ideal weight. For example, it is much more difficult for people over 40 to lose weight due to the ongoing restructuring of the body.

The hereditary factor also plays an important role. If at the genetic level there is a predisposition to fullness, get rid of extra pounds much more difficult. If we discard this factor, you can find out the weight norm for men and women using various formulas, we will consider each of them in more detail.

Body weight formulas for men and women

There are various weight and height calculators for adults and teenagers, but the easiest and surest way is to calculate the ideal weight by height yourself. There are many formulas developed by scientists that allow you to find out weight by height.

Brock's formula

The French physician Paul Brock developed the formula for the ratio of weight and height, which is still considered one of the most universal. The formula takes into account not only height, but also physique (lean, normal, stocky) and age.

Brock's ideal weight formula looks like in the following way: height - 100. If a person has a thin physique, you need to subtract 10%, and if there is a stocky one, add 10%.

If the height is less than 165 cm, subtract 105, if above 175 cm, subtract 110. Age should also be taken into account. People between 20 and 30 years old need to reduce the figure you get by 10-12%. If you are over 50, increase it by 5-7%.

Lorentz method

Calculation of the optimal weight for women: (height - 100) - 0.25 x (height - 150).

Ideal weight formula for height and age

Weight norm for women by age and height: 0.9 × (50 + 0.5 × (Height, cm - 150)) + 0.5 × (age - 20)

Weight and height formula for men: 1 × (50 + 0.5 × (Height, cm - 150)) + 0.5 × (age - 20)

Tables of normal weight and height

In addition to special formulas, there are weight and height tables for men and women.

Quetelet index

We present a table of norms of weight and height for adults from 20 to 65 years. Please note that this calculation of weight and height for undergrowth, pregnant women, athletes and the elderly from 65 years of age is not suitable.

The result obtained must be compared with the height and weight table for girls and men:

Video

Calculation of the ideal body weight of an adult Quetelet

This author has another table perfect height and weight, taking into account the age and physique of the person. To find out the ratio of weight, height and physique, divide the weight in grams by the height in centimeters. Compare the result with the parameter in the specified cell, relative to your physique. The main criterion is to be honest with yourself when evaluating the physique.

Example: we calculate the normal weight with a height of 175 cm, age 25, weight 60 kg and normal build: 60,000 / 175 = 342.8. This is a normal index for this person.

Table of weight and height of an adult Egorov-Levitsky

To calculate the weight for a man and a woman using this table, you just need to compare the data. Be careful, this is not the ideal weight for men and women, but the maximum. Also remember that the table shows the height and weight of an adult from 20 to 69 years old.

To "blind" perfect figure would require a significant amount of time and effort. However, before embarking on this difficult task, go to the mirror and look at yourself critically, but with love. You can take a centimeter and measure all your circumferences, just don't draw any gloomy conclusions if you don't get 90-60-90.

Most likely, it really will not work out, but there is no tragedy in this. First, there are many things that can be fixed. Secondly, a lot of things may not need to be corrected.

Type of constitution

For example, anthropologists distinguish three main types of constitution (not to mention numerous transitional and intermediate variants). These three types are called: normosthenic, hypersthenic and asthenic.

A person with a hypersthenic constitution, most often of average or below average height, broad-boned, with relatively short arms and legs and a wide chest. Asthenik is tall, long-legged, with a narrow chest, as if directed upwards. Normostenik means “normal”: growth is average and everything else too.

You can quite accurately determine your constitutional type by the so-called intercostal angle, which is formed by the lowest costal arches. Stand in front of a mirror with your stomach in and out chest, and see what your intercostal angle is (you can even take a large protractor and measure).

If it is approximately 90 degrees, then you are normosthenic. If this angle is sharp, less than 90 - you are asthenic, and if obtuse - hypersthenic. AT last case, in particular, successful weight loss can lead to a not very successful result: thinness will not decorate the hypersthenic, and some “extra” weight, on the contrary, will round out the somewhat square outlines of the figure.

Ideal weight is not a number on the scale, but an integral important component of your life.

Ideal weight

Your weight is ideal if:

• It does not cause health problems (or potential risks);
• It does not restrict you Everyday life, desires and needs;
• You are satisfied with your body as it is, and at the same time you do not feel embarrassed;
• You like your body and don't compare yourself to the people around you (or actors, singers, athletes, etc.).

There are various indicators and formulas that can determine the approximate weight range in which you may begin to develop health problems, as well as the weight you need to strive for in order to minimize or completely eliminate these problems.

Methods for determining excess weight

1. Determination of excess weight using scales

The simplest (and most approximate): height (in centimeters) minus 110. The resulting number (in kilograms) is the ideal weight. However, this does not mean that “everything else” is superfluous.

There is the easiest and most accurate way to determine if you are overweight: just measure the crease on your stomach. Among women allowable rate- 2-4 cm, but for men a little less - 1 - 2 cm. Experts say that from 5 cm or more - obesity. True, unfortunately, in this case we will not see the exact result of how much we need to lose. This is just a kind of hint that it's time to sit down at the simulators and on a diet.

3. BMI - body mass index (Body Mass Index)

The so-called body mass index (BMI) has received general recognition. His calculation: Divide your weight in kilograms by your height in meters squared. Example: BMI \u003d 68kg: (1.72m x 1.72m) \u003d 23. This formula is good because it works for both “kids” and “giants”.

The following BMI values ​​are distinguished:

less than 15- acute weight loss;
from 15 to 18.5- weight deficit;
from 18.5 to 24 - normal weight;
from 25 to 29- overweight;
from 30 - 40- obesity;
over 40- severe obesity.

4. Online ideal weight calculator

5. Scales that determine the percentage of body fat

But BMI does not speak about the distribution of kilograms on the body. Physique matters. With the same height and weight, one person will be slim and strong, the other full and loose. The ratio of muscle and fat is important, how many percent of the total body weight is fat mass, how much is muscle and bone, how much is water. The normal proportion of fat in the body of men is 12-18%, women - 18-25%.

Recently, devices have appeared to determine the percentage of body fat. In the process of bioelectrical analysis, a weak, absolutely safe electric current is passed through the body. The principle of analysis is based on the fact that electrical impulse passes more easily through muscle and water than through fat. Now scales have appeared that include this technology, you can use them to regularly and more or less accurately measure at home not only your weight, but also the percentage of fat.

6. The formula for determining the realistically achievable weight

The formula is applicable for cases when a person begins to lose weight with a fairly large weight.

The calculation is carried out in two stages:

1. First determine your weight, as if you were the owner of a normal metabolism:

(45 kg) + (1 kg for each centimeter of height over 150 cm) + (0.5 kg for each year over the age of 25, but not more than 7 kg).

2. Then carry out a correction for a slow exchange:

Add from 4.5 to 7 kg;

Add another 4 to 7 kg (with an initial weight of about 90 kg);

A few more kilograms are added (with the initial weight, greatly exceeding 100 kg).

An example for a fifty-year-old lady with a height of 158 cm, weighing 90 kg today:

45 kg + 1 kg (158 cm - 150 cm) + 7 kg + 7 kg + 7 kg = 74 kg.

If our lady manages to bring herself up to 60 kg, then she is provided with all sorts of health troubles and an inevitable quick return to her original weight, plus a certain number of cheerful kilograms.

How does body weight affect health?

What does the number on the scale really mean? How does it relate to all the reasons why you want to lose weight? Perhaps you want to look more attractive, improve your health, fit into your favorite jeans or put on a beautiful dress that has been hanging in the closet for many years, improve your physical form, return to youth, or is it just more comfortable for you to live with fewer kilograms? The number on the scale is not what determines your success or failure. There are so many ways to measure progress and success besides constantly monitoring the scale.

There is only one reason to talk about "normal" or "ideal" weight and that reason is your health.

Which can later lead to serious illness or even death. Although your specific weight may not be the cause of any diseases, it is absolutely known that people whose weight is above or below the “normal” are much more susceptible to various health problems.