Child weight and height calculator. Reasons for underweight. WHO Child Height and Weight Calculator Body Mass Index 13 years old

Each child at birth is checked for compliance with the weight and height parameters, the norms of which are presented in the corresponding centile tables developed by the World Health Organization. Another way to check data is to use online calculators. They usually include parameters that children should have from birth to 12 years old. For parents, these numbers are of particular importance, as they are a sign of normal growth and development of the child or signal deviations from standard indicators.

Height and weight calculator

Child height and weight calculator is special program, designed to determine the norm of weight and height of the child in accordance with his age (from 0 to 12 years). In addition to the existing this moment parameters, the calculator allows you to predict future growth and weight. To do this, you need to fill in additional fields.

On a note. In each individual case, the development of the baby occurs individually, as a result of which the dynamics of growth and weight gain may differ from the average parameters.

To make sure that the baby is developing normally, it is useful to check the standards set by WHO from time to time, as well as to get information about the predicted numbers. If the parents' concerns about the child's health are confirmed, it is necessary to find the cause of the deviations and choose the appropriate way to eliminate the defect.

The result of calculations in the calculator is given in the following options:

• According to centile tables;
• In the form of a ratio of weight and height of the child.

For example, consider the following option. The boy is 9 years old. The height of the child is 148 cm, weight - 33 kg. If we compare the obtained data with generally accepted standards presented in centile tables, we get:

• Growth is high, since at the age of 9 years, 126-136 cm is considered the norm;
• Weight is overweight, since data in the range of 25.6-31.5 kg are the norm.

If we consider the weight of the boy in accordance with his height, then the indicator is low - the normal body weight with a height of 148 cm is 35-38 kg.

So, the weight of the child is above average, while the growth of the boy is even more higher than the norm, therefore, the weight to a certain extent lags behind the growth parameters. Based on the data of the centile tables, the child's weight is overweight for the standard, while at the same time insufficient for the boy's height.

Important! All data obtained using the calculator, including predicted figures, must be analyzed. If there are obvious deviations from the norm, you should consult a doctor for advice.

The technique for using the online application is as follows:

1. Select the gender and age of the baby. The program will give the parameters that the child must meet according to the generally established standard.
2. Click "Calculate".
3. Measure the child's height and weight.
4. Compare the result with the parameters of the calculator.

Interesting. The weight of a newborn is the main indicator that determines the vital activity of the crumbs. That is why babies in the hospital are weighed every morning. The normal weight of a newborn should be between 2.5-4.5 kg. A discrepancy with the lower limit indicates malnutrition, which can be caused by serious developmental disorders. Exceeding the upper limit indicates overweight of the baby, in this case it is recommended to change the feeding regimen.

Modern child development standards are based on the fact that breast-feeding is a biological norm. The standard is a healthy full-term baby who has no problems with weight and is on breastfeeding. The old standards, unlike the new ones, were based on the parameters of both breastfed and formula-fed children.

To establish standards, experts examined about 9,000 babies that meet all the necessary parameters. The data obtained was used to plot the weight and height of children aged 0 to 10 years and by gender.

Child information

To get the initial data to check them in the calculator, you need to correctly measure the height and weight of the child. To determine growth rates at home, you can use a centimeter tape or height meter. The child is placed barefoot on the floor with his back to the ruler. It is important that the baby stands straight, his arms are lowered along the body, his knees are unbent, and his feet are shifted. The head of the child should be positioned so that the edge of the lower eyelid and the upper edge of the ear are on the same line. During the procedure, the baby should touch the plane with heels, buttocks and shoulder blades.

An anthropometer is also used to determine the height of a child. During the procedure, the doctor asks the baby to stand up straight and turn his right shoulder to him. The device is placed vertically in front of the child. Hold a bar with a scale right hand, the movement of the measuring ruler is carried out with the left. As a result, the value at the top of the ruler is considered. The error is approximately 1 mm.

Good to know. If you want to set the length of the body of a small child, then you must use a height meter for babies. In this case, measurements are taken in the supine position. After 2 years, height is measured in a standing position.

If we talk about body weight, then this parameter is determined using weights. It is best to use an electronic scale for this. The child during the measurement process should stand on the central part of the device. The position in which the baby is (sitting, lying or standing) during the procedure depends on the age.

On a note. If the baby is weighed in a diaper, then the weight of the diaper is subtracted from the result. Measurements are carried out in the morning, when the child has not yet eaten, but has already gone to the toilet.

Result and evaluation

Using the calculator, you can determine the normal weight, height, BMI in accordance with the age of the child, and also get an analysis of the identified indicators. The result might be:

• Very low;
• Reduced;
• Below the average;
• Moderate;
• Above average;
• High;
• Elevated.

A very low growth rate indicates a significant lag in development and (often) the presence of extra pounds. In this case, a medical examination is required to establish the cause and further treatment.

A low indicator indicates a slight developmental delay, which can also lead to the appearance excess weight. A visit to a specialist is recommended. Below average means that it is within the normal range. Average - the most common value that is typical for healthy children.

Above average is also within the normal range. High is rarely determined and most often has a hereditary character. It is not a sign of developmental disabilities.

A very high growth rate may be the norm if the parents have similar parameters. In other cases, a similar result indicates an endocrine disorder, then it is advisable to visit a doctor.

As for weight, the definition of this parameter does not allow an objective assessment of the development of the child. However, indicators such as very low or elevated indicate a deviation and are a reason to visit a doctor.

Calculator scores look like this:

• Very low - indicates the likelihood of exhaustion of the body. Need medical help;
• At low rates, exhaustion is also possible;
• Below average - is within the normal range, but it is desirable to review the diet and diet;
• Medium - the optimal value for healthy children;
• Above average - within the normal range, however, it is recommended to carry out an assessment taking into account the child's BMI, the calculator will do an excellent job of this task;
• Elevated - also requires a BMI assessment.

The weight of the baby can change under the influence of various factors, which include:

1. Heredity;
2. Malnutrition;
3. Poor quality of food;
4. Stress (in mother or child);
5. Bad ecology;
6. Mother smoking.

These factors most often lead to malnutrition, with the exception of the first - heredity can cause both underweight and excess weight equally.

Other reasons:

1. Energy imbalance. It occurs as a result of receiving more or less calories than the body needs.
2. Internal pathologies. The most common reason is a change in the hormonal background, which leads to metabolic disorders.
3. Gender (boys weigh more than girls: 3.2-3.5 kg and 3.0-3.25, respectively).
4. Pregnancy health.
5. Nutritional quality of a pregnant woman.
6. Control of the breeding process. It is important to do an ultrasound in a timely manner, checking the health of the baby in the womb.
7. Binge eating. It is the result of overfeeding, when the baby is forced to eat against his will.

On a note. According to centile tables, normal for a healthy full-term baby are indicators from "below average" to "above average". The weight of the baby at birth is not importance, as the same indicator in terms of its compliance with the gestational age.

How to calculate the BMI of a child up to a year

To assess excess weight World Organization health care uses BMI - body mass index. This parameter is based on the ratio of height and weight and further calculation of the proportion of fat mass in the child's body. The author of the method was A. Quetelet.

To determine the parameter, you can use the BMI calculator using the Quetelet formula. Since the weight gain and growth of the child's body is very active, the BMI of the child can change significantly over a short period of time. Therefore, the standard BMI assessment intended for adults is not suitable for babies.

To obtain a correct estimate of BMI, experts examined the ratio of height and weight of several thousand children. Thanks to the revealed values, it is now possible to compare the BMI of an individual child with the averages of a huge number of other children in the same age group. The data obtained when measuring BMI falls into one of the following categories:

• Underweight (BMI is below the 5th average);
• Normal weight (the value is between the 5th and 85th indicator);
• Overweight (the parameter is in the range between the 85th and 95th value);
• Obesity (the index falls within the range of 95 and above).

On a note. To obtain more accurate data in relation to children under 2 years of age, special charts of the ratio of height and body weight are used, and a thorough medical examination is also carried out.

BMI is not an ideal way to check body fat. Sometimes these studies can be misleading. For example, a teenager with a strong physique and developed muscles may have a high BMI, but not be obese (muscle, not fat, in this case, increases body weight). In addition, the index can be difficult to assess during puberty, as adolescents go through stages of active growth and development at this time.

There is also a formula for calculating BMI, which includes 3 main steps:

• Measure the height of the baby in meters;
• Square this value;
• Divide the child's body weight by the resulting figure.

On a note. BMI is individual for each person. At the same time, there are a number of reasons that affect the decrease or increase in this parameter.

Growth and weight standards for boys

Normal indicators of height and weight of boys up to a year are as follows.

Growth and weight standards for girls

Normal indicators of height and weight of girls up to a year are as follows.

The ratio of height and body weight

The table of the ratio of the weight and height of the child is as follows.

The child's weight and height calculator allows you to calculate the weight range that is ideal for the specified height. These parameters are calculated based on medical statistics.

The calculator for the growth and weight of the baby, as well as an older child, will allow you to control the development of the baby, determine how much he weighs and what his height is at the moment, predict these indicators and identify possible deviations from the norm in time.

Video

Very short: W significant growth retardation, may be accompanied by excess weight. An examination by a specialist is necessary to determine the cause and eliminate the stunting. Undersized : Oh stunted growth also sometimes leads to excess weight. It is recommended to consult a doctor. Below average : N Small child, but growth within the normal range.. Medium : U the child is of average height, like most healthy children. Above average : Tall child, growth is within the normal range. High : T This growth is rare, mostly hereditary and cannot indicate the presence of any abnormalities. Very high : T Such growth can be both the norm, in the presence of tall parents, and a sign of an endocrine disease. We recommend consulting with experts. Growth does not match age : Height does not correspond to age - perhaps an error when entering indicators. Please check the data and use the calculator again. If the data is correct, this is a clear deviation from the norm. A detailed examination by a specialist is required.

Baby weight

By itself, weight without taking into account height and other data does not provide a deep assessment of the development of the child. However, the "Low Weight" and "Extremely High Weight" scores are sufficient for a doctor's consultation (see centile weight tables for more details).

Possible weight estimates:

Strong underweight, extremely low weight : It is highly likely that the child suffers from exhaustion of the body. An immediate examination by a doctor is necessary. Underweight, low weight: Probably, the child's body is exhausted, a specialist examination is necessary. Less than average: The weight is in the lower limits of the normal weight for the indicated age. Average : The child has an average weight, the same as most healthy children. Larger than average : Extra large : When obtaining this estimate, weight should be estimated based on BMI (body mass index) data. Weight does not match age : There may have been a data entry error. If all the data is correct, the child most likely has problems developing height or weight (see height and BMI estimates). Be sure to consult with an experienced doctor.

Body mass index

To assess the harmonious development of a child, it is customary to look at the ratio of height and weight - Body Mass Index (BMI). This indicator allows you to most accurately determine the deviations in the weight of the child, or, conversely, shows that the weight of the child in relation to height for his age is normal.

It should be understood that this BMI indicator for each age of the child is different and even more different from the indicators of an adult, therefore this calculator must take into account both the height and the age of the child for a correct calculation (see)

Body mass index estimates:

Severe underweight : Great exhaustion of the body. Diet needs to be adjusted as directed by a physician. Underweight : Exhaustion. Diet needs to be adjusted as directed by a doctor. Reduced weight : The lower limit of the norm. The child has less weight than most of his peers. Norm: Optimal ratio of height and weight. Increased weight: The upper limit of the norm. The child is somewhat heavier than most of his peers. In the future, there is a risk of gaining excess weight. Overweight : The child is overweight. It is recommended to correct the diet as prescribed by the doctor. Obesity : It is necessary to adjust the diet as prescribed by the doctor and increase the physical activity of the child. Can't be assessed : BMI readings are much higher than normal, you may have made a mistake when indicating height and weight. If the data is correct, then the child is probably severely obese and the help of an experienced doctor is needed.

Body mass index, or BMI, is a measure of body size. It combines a person's weight with their height. BMI measurements can give an idea of ​​whether a person has correct weight for your growth.

BMI is a screening tool that can indicate whether a person is underweight or healthy weight, overweight or obese. If a person's BMI is outside the healthy range, their health risks can increase significantly.

Carrying too much weight can lead to various health conditions such as high blood pressure and cardiovascular problems.

Too little weight can increase the risk of malnutrition, osteoporosis, and anemia. The doctor will give appropriate recommendations.

BMI does not directly measure body fat and does not take into account age, gender, ethnicity, or muscle mass in adults.

However, it uses standard weight status categories that can help clinicians track weight status in a population and identify potential problems in individuals.

BMI in adults

Calculating BMI involves measuring a person's height and body weight.

Metrics

• To calculate BMI in metric units, use the following method: BMI = kg/m2
• So, to calculate the BMI of adults: Divide their weight in kilograms (kg) by the square of their height in meters (m2)

Since most people measure their height in centimeters (cm), divide your height in centimeters by 100 to get your height in meters.

Imperial

• When using imperial units, the formula is: BMI = lb x 703/in2
• In other words: multiply the person's weight in pounds (lbs) by 703. Then divide by their height in inches squared (in2)

To avoid using math, a person can use a calculator or chart to find out their BMI.

You can use the BMI calculator.

BMI charts

People can also determine their BMI using a graph. Click to see the diagram provided National Institute heart, lung and blood (NHLBI).

Find your height in inches on the side of the chart and then look at it to find your weight in pounds. Scan upward to see if the result is normal weight, overweight, or obese.

Understanding the Results

The following table lists the standard weight status categories associated with adult BMI ranges.

BMI less than 18.5
A BMI of less than 18.5 indicates that you are underweight, so you may need to put on some weight. It is recommended to consult a doctor or nutritionist for advice.

BMI 18.5–24.9
A BMI of 18.5-24.9 indicates that you are at a healthy weight for your height. By maintaining a healthy weight, you reduce your risk of developing serious health problems.

BMI 25–29.9
A BMI of 25-29.9 indicates that you are slightly overweight. You may be advised to lose weight for health reasons. You are advised to consult your doctor or dietitian.

BMI over 30
A BMI over 30 indicates that you are overweight. Your health may be at risk if you are not losing weight. You are advised to consult your doctor or dietitian.

BMI in children and adolescents

In adults, BMI values ​​are not related to age and are the same for both sexes.

However, measuring BMI in children and adolescents is somewhat different. Girls and boys develop with different speed and have different amounts of fat in different ages. For this reason, BMI measurements in childhood and adolescence are adjusted for age and gender.

Doctors and other healthcare professionals do not classify children into healthy weight ranges because:

• they change every month
• male and female body types change at different rates
• they change as the child grows

Doctors calculate BMI for children and teenagers the same way they do for adults by measuring height and weight. They then determine the BMI number and age of the person on the BMI chart based on gender. This will indicate if the child is within the healthy range.

Calculator and graphs for children and adolescents BMI

The Centers for Disease Control and Prevention (CDC) has developed a calculator that provides BMI and the corresponding BMI percentile for age on the CDC Growth Chart for Children and Teens.

Calculator on the Ru site, and a calculator on the English site. Use the one that is comfortable for you.

Use the calculator first, then use the charts to see if the child's weight is appropriate for their age.

Charts for children and teenagers:

What do the results mean?

How Doctors Use BMI

BMI is not accurate enough to be used as a diagnostic tool, but it can track potential in adults and children.

If someone has a high or low BMI, a doctor or other healthcare professional may consider other factors, such as:

• skinfold thickness measurements that show how much body fat is in adults and children
• diet and physical activity assessments
• discuss any family history of cardiovascular disease and other health problems
• recommend other suitable medical examinations

Based on these results, a doctor or healthcare professional can make recommendations for.

Health risks of being overweight

Excess weight has the following effects on the body:

• This increases how hard the heart has to work.
• Raises blood pressure, blood cholesterol and triglyceride levels.
• It lowers high-density lipoprotein (HDL) or good cholesterol levels.
• This can make diabetes and other health problems more likely.

According to , carrying excess weight can increase the risk of the following conditions:

• hypertension or high blood pressure
• dyslipidemia, which includes high LDL cholesterol, low cholesterol, or high triglycerides
• cardiac ischemia
• Stroke
• gallbladder disease
• osteoarthritis
• sleep apnea and breathing problems
• certain types of cancer, including endometrial, breast, and colon cancer

Carrying extra weight during childhood or adolescence can also pose significant health risks in both childhood and adulthood.

As in adulthood, childhood obesity increases the risk of various health problems, including cardiovascular disease, diabetes, and sleep apnea.

The American Heart Association (AHA) notes that children with a high BMI also have a higher risk of:

• asthma
• low self-esteem and

Healthy Weight Benefits

In addition to reducing the risk of disease, maintaining a healthy weight offers additional benefits:

• less joint and muscle pain
• increased energy and ability to engage in more activities
• improved regulation of body fluids and blood pressure
• reducing the load on the heart and circulatory system
• sleep improvement

Other Healthy Body Measures

BMI is a useful tool, but it cannot tell if a person's weight is made up of muscle or fat.

For example, an athlete with a lot of muscle tissue may have a higher BMI than someone who is not very active. But this does not mean that the athlete is overweight or unhealthy.

Also, high blood pressure is more common in people who have extra fat - known as visceral fat - around their midsection rather than their hips.

Other measures of body size include waist-to-hip ratio, waist-to-height ratio, and body composition, which measures body fat and lean body mass. These measuring systems are more focused on the amount of fat and its distribution throughout the body.

Together with BMI, these additional measures can help to more accurately assess the health risks associated with a person's weight.

Outcome

BMI can be a useful screening tool for predicting certain health risks. However, people should use it with caution as it does not take into account other factors such as activity levels and body composition.

For children and teenagers, it is important to consider their age and gender when measuring BMI because their bodies are constantly changing as they develop.

BMI - body mass index- reflects the state of human health. This indicator depends on the fat resources of the body and may correspond to the norm, be excessive or deficient. Many people have a body mass index that is far from optimal. No wonder BMI appeared in medical records as a key risk factor for morbidity and began to be taken into account in the diagnosis.

What is your body mass index?

According to the WHO, half of the people on the planet die today not from dangerous infections like in past eras. Fast food, overeating, stress, "sedentary" work and "couch" leisure have become the main enemies of man.

A whole generation of obese people has grown up and are doomed to type 2 diabetes, cardiovascular disease, osteochondrosis and many other dangerous ailments. The asymptomatic period of these pathologies can drag on for years, during which the body's strength will slowly but surely be undermined. About the destructive activity of a hidden disease and will warn an increased body mass index.

In turn, a lowered BMI will signal another deviation from the norm - the painful exhaustion of a person. This state of affairs should also cause concern. An organism with an insufficient mass of body fat is not able to normally cope with its functions and resist diseases. Lack of adipose tissue may be a sign diabetes Type 1, osteoporosis, digestive disorders, breathing or mental problems.

In any case, the body mass index will allow you to catch yourself in time and start recovery. physical form. Of course, on the path to perfection, you will need to pull yourself together, get rid of bad habits, sacrifice destructive addictions. However, the game is worth the candle, because the most precious thing is at stake - your life.

How to calculate body mass index?

To find out this indicator, you need to determine your weight (in kilograms) and measure your height (in meters). Then the number indicating the weight should be divided by the number obtained by squaring the numerical expression for height. In other words, you need to use the formula that conveys the ratio of body weight to height:

BMI = M / R 2

(M - body weight, P - height in meters)

For example, your weight is 64 kg, your height is 165 cm, or 1.65 m. We substitute your data into the formula and get: BMI \u003d 64: (1.65 x 1.65) \u003d 26.99. Now you can turn to official medicine for the interpretation of BMI values:

• it does not take into account the ratio of muscle and fat mass, so BMI will not be able to adequately reflect the state of health of a bodybuilder involved in building muscle potential: once he calculates the body mass index using the Quetelet formula, and according to the results, he will be in the company of loose fat men;
• these calculations are not suitable for older people: for 60-70-year-old pensioners, somewhat overweight is not considered dangerous to health, so the BMI range for them can be extended from 22 to 26.

If you are not an elderly person and not a bodybuilder, then the Quetelet formula will quite cope with the assessment of the balance of your parameters. The magnitude of the error in this case does not interfere with understanding whether you are normal or not.

It should be borne in mind that the understanding of the medical community about the BMI norm may change over time. It already happened on the threshold of the third millennium, when the BMI index recommended by doctors dropped from 27.8 to 25. But Israeli scientists proved that a body mass index of 25-27 is optimal for men: with this index, they are provided with the greatest life expectancy.

How to calculate body mass index online?

Our online calculator is your quick and accurate BMI calculator. You don't have to manually multiply and divide. The automatic program of the electronic calculator will save you from this puzzle.

Its working principle is simple and clear. You only need to take three steps:

1. Enter your gender (for physiological reasons, BMI for women is usually lower than for men).
2. Record your height (in centimeters) and weight (in kilograms).
3. Enter the full number of your years in the appropriate field.

After filling out the entire form of the calculator, you should click the "Calculate" button. Having accepted the data from you, the program will immediately give the correct result with recommendations from experts.

You will learn what to do if your index is far from optimal or starts to move away from it. Even if you still have a normal BMI, do not neglect the wishes outlined here. Then in the future you will not have health problems.

IN tables "Height and weight of the child" given below, you will see scores from 1 to 8, and percentages are the score that doctors put when examining a child. The so-called centile corridor.

Values ​​25% 50% 75%— Norma

10% to 125% or 75% to 90%- Minor deviations from the norm.

3% to 10% or 90% to 97%- It is necessary to pay attention to the health of the child and conduct additional examinations.

Below 3% or above 97%- A high probability that the child has a pathology that affects physical development child.

Future growth of the child

(Mom's Height + Dad's Height) / 2 = Base

For girls: Base -5 cm. \u003d Child height in adulthood

For boys: Base +5 cm = Height of the child in adulthood

For example: mom's height is 162 cm, dad's height is 178 cm. The approximate height of their son will be 175 cm. ((162+178)/2= 170; 170+5= 175)

Table of height and weight for children and adolescents from 0 to 17 years.

Table of the ratio of height and weight

Body mass index (BMI) for children and adolescents from 2 to 20 years.

This is the most accurate indicator of the ratio of height to body weight of children and adolescents. It is advisable to regularly measure and record this indicator. So you can at the right time determine the tendency of the child to obesity or underweight and prevent negative consequences.

• Suppose the child is 9 years old and is a boy. Then we open the body mass index table for boys aged 0 to 20 years.
• On the lower axis we find the number 9 (the age of the child).
• On the left or right axis we find the number 16.0 (child's BMI).
• We look at the intersection of lines coming from the obtained points.

We evaluate the result:

The red and green lines are the ideal ratio of height to weight.

Above the yellow field - a large bust of body weight

Centile corridor 75% - 85% (in some tables the upper limit is 90%) - a little overweight

Centile corridor 50% - 75% - the norm, the ratio of height to weight is above average

Centile corridor 25% - 50% - the norm, the ratio of height to weight is below average

Centile corridor 10% - 25% - slight underweight

Below the yellow box - a large underweight

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