What should be the height and weight of a 1.5 year old child?

Your baby is growing up - his first birthday is behind him, the manifestations of the one-year crisis are gradually subsiding, the baby’s behavior is becoming more conscious, and the parents’ relationship with him is reaching a new level. Mastering new skills occurs very quickly; all development over the previous year and a half was aimed at preparing him for full interaction with the outside world. So, with what results do children approach this milestone, how does a child’s development differ at 1.5 years old, what to expect, how to stimulate new achievements?

Assessment of a child’s physical development

Child development is assessed according to four indicators:

  • Height;
  • Weight;
  • Head circumference;
  • Chest circumference.

In this article we will talk about the first two parameters, given in accordance with the norm adopted by WHO.

The World Health Organization (WHO) conducted a series of studies between 1997 and 2003 on the development of healthy children from 0 to 24 months, and in a cross-sectional study from 18 to 71 months. Research includes parameters of the child’s height and weight, their relationship and the monthly norm of physical development.

Intellectual development

Children of the second year of life acquire many “skills” of an intellectual nature. They may appear in different sequences, earlier or later. Remember that it is incorrect to determine a child’s mental development based on an average list of what a child should be able to do at a given age. Observe the baby, take into account his personal characteristics, character traits, and your lifestyle. Typically, at about 18 months of age, babies are able to do the following:

  • Carry a toy with you on a string,
  • Build a simple pyramid
  • Sort items by shape and color
  • Draw oval shapes, zigzag, straight lines,
  • Turning book pages, imitating reading, enthusiastically looking at pictures,
  • Place simple shapes or large beads into the sorter holes,
  • Think through your actions - for example, bring a stand to get something.

Indicators of physical development of girls and boys under one year of age

The height and weight of a child up to one year are the most important parameters for determining the normal development of the child. The nurse or doctor weighs the child monthly, measures his height, chest and head circumference, and records these figures in the medical record. What factors are taken into account?

  • Maternal nutrition after conception.
  • Gender of the child.
  • Weight and height of the child at birth.
  • Nutrition - height and weight directly depend on the daily intake of protein, carbohydrates, fats and calcium, vitamins and other microelements.
  • Previous illnesses: ARVI, intestinal infections, severe dehydration, teeth thinning and loss of appetite.
  • Genetics - the presence of disorders, congenital pathologies, chromosomal diseases.
  • Social conditions in which the child is raised. Problems in the family environment directly affect the growth and development of the child. They lead to a delay or even arrest of development, and the genetic material that was passed on from parents to child does not reach its full potential. Children who develop in an environment filled with love, joy, peace and trust develop more harmonious and healthy bodies;
  • Sleep - a child grows most rapidly during sleep. Systemic lack of sleep actually affects the development of the baby.

If a child is born prematurely or underweight, the weight and height of such a baby will differ from those of children born from 38 to 42 weeks of pregnancy and normal weight.

What should be the height and weight of a 1.5 year old child?

Pregnancy, children > Child development > What should be the height and weight of a child at 1.5 years old

The correct development of a baby is determined by the main parameters - weight and height. These characteristics, based on many years of research, have been reduced to a single standard, separately for boys and separately for girls. But each child is an individual, and therefore the indicators of weight and height in the development of the baby, naturally, may differ slightly from the generally accepted ones.

It is necessary to monitor changes in the baby’s weight and height immediately from the moment of birth. This way you can make sure that the baby is developing normally and there is no pathology in its development.

By the age of one year, children most often increase their weight by 3 times in relation to what they were born with, and weigh slightly more than 10 kg. Height during this period is about 76 cm for boys and 75 cm for girls. On average, during the first year of life, the height of babies can increase from 20 to 25 cm. After the baby turns one year old, he grows further, but his growth rate is no longer so fast and gradually slows down. During the second year of life, the baby stretches by 9-10 cm, and in the third year - by 7-8 cm. If parents keep weight and height curves, then after 12 months these lines no longer rise sharply, but, on the contrary, become smoother.

The child undergoes control measurements monthly until he is one year old, and then the child’s height and weight are measured once every six months. What should be the height and weight of a 1.5 year old child?

Read: Modern methods of early childhood development

It is convenient to determine the characteristics of a child’s physical development using tables that can be found in the medical literature, on the pages of women’s magazines, and on various Internet sites dedicated to motherhood and childhood. So, at one and a half years old, a boy’s weight should correspond to 11.6 kg and height 82 cm. For a girl, the same indicators correspond to 11.1 kg and 81 cm.

In addition to tables determining the average parameters of height and weight, you can use formulas to calculate the normal height of a child:

for boys height = number of years * 7 + 75

for girls, height = number of years * 7 - 1 + 75

The normal weight value for all children can be determined using the formula:

weight = number of years * 2 + 8

These formulas are applicable in the age range 1-7 years. They are conditional and give average indicators.

Many parents, knowing the standard indicators of child development, are very worried if the baby has deviations in weight and height from the generally accepted ones. Moreover, parents are alarmed by both lower weight and height, and more than “necessary”.

In such a situation, before rushing to conclusions, you should consider a set of factors: the baby’s weight and height at birth, the mother’s diet during pregnancy and breastfeeding, the baby’s due date, and others. For all these cases, the tables of weight and height always have separate columns with an acceptable difference from the planned indicators: the average weight of a 1.5-year-old child can change both upward and downward by 2.5 kg for a boy and by 3 kg for a girl. The permissible difference in height is +/- 7 cm for a boy and +/- 6 cm for a girl. Also take into account the hereditary factor. For example, if dad is tall, then don’t be surprised that your child is always ahead of his peers in height.

Naturally, if such deviations are very significant, it means that the child’s body is developing with disturbances. In this case, it is necessary to identify the cause of these deviations as quickly as possible and eliminate it. If the deviations are small, and the general state of the child’s health does not cause any concern to the doctors, the baby grows and develops normally, then there is nothing to be afraid of. After all, even at the genetic level, the individual development of the baby is laid down. A child can be large and tall, or vice versa – thin and short.

When parents personally assess the child’s physical parameters, it is important to pay attention to:

Read: Raising a 4-year-old child

  • on the frequency of his stool, the color of urine, the presence of impurities, etc.;
  • on the baby’s motor activity, his energy, curiosity, desire for new discoveries;
  • on the baby’s mood and its sudden changes, the child’s psycho-emotional state and his psychophysical development as a whole;
  • on the baby’s skin (dryness, rashes, peeling, etc.), the presence of a healthy shine in the eyes, the condition and growth of nails and teeth.

For healthy growth and proper development of the baby, you should not neglect the basic rules that every parent knows:

  • Develop the right taste preferences in your child from early childhood, provide a balanced diet and adhere to a proper diet. Ultimately, unhealthy diets (rich in carbohydrates) and constant overeating often lead to excess weight, which can greatly affect the quality of a child’s subsequent “adult” life and his health;
  • develop the baby’s physical abilities with the help of active, dynamic games, morning exercises, hardening procedures and massage;
  • develop a healthy daily routine for your child (sleep, rest, study, walks outside, etc.) and monitor its constant compliance.

The most important thing in a child’s development is the acquisition of those skills, the development of those body functions that should correspond to age. But height and weight are general characteristics that do not necessarily have to be the same for everyone.

Take care of yourself and be healthy!

22 Jul 2012 Yuki 740

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Weight and height table for a boy under one year old

Characteristics of the first year of life

  • The average (normal) birth weight of a baby is between 3.2 kg and 3.7 kg.
  • The baby may have a normal birth weight, but the baby may even lose some weight in the first week of life.
  • The weight of newborns is added monthly at the following average rate: from 1 to 3 months - 750 g, from 4 to 6 - 700 g, from 7 to 9 - 550 g, from 10 to 12 - 350 g
  • When bottle-fed, babies gain weight quickly.
  • The height range of a child may vary depending on the weight, gender, and overall development of the baby.
  • The growth of a newborn increases monthly according to the following average pattern: from 1 to 3 months - 3.5 cm, from 3 to 6 - 2.5 cm, from 6 to 9 - 1.5-2 cm, 9-12 - 1 cm per month .
  • The most intensive growth is observed in the first months of life, then it slows down slightly, and at the end of the first year of life the child grows even more slowly.
  • The normal weight of a child for one year ranges from 8.9 kg to 9.6 kg.
  • The average height of a 1 year old child is from 74 to 76 cm.
  • In the first year of life, a child can grow by 20-25 cm.

Infants under one year of age are especially sensitive to underweight. Slow weight gain may indicate anemia, malnutrition, rickets, immune deficiency, endocrine disorders, and central nervous system disorders. With stable weight loss, delays can begin not only in physical, but also in mental development. It is important to ensure that the breastfed baby has enough breast milk. You can also add formula during breastfeeding.

Practical skills of a child at 18 months

Let's look at what a child can do at 1 year and 6 months. The skills listed below are a kind of guideline for parents, but do not forget that they are very conditional and averaged. The level of proficiency in any skill depends on many factors, individual and unique for each family. Every child has the right to develop and learn at his own pace.

Physical sphere:

  • The baby can stand up with support, walk without the help of an adult, run,
  • The ability to coordinate movements appears: squat and rise, bend over a toy, turn in different directions, change the direction of movement, jump, climb on and off hills,
  • A more advanced level - jumping, stepping over obstacles, walking up stairs. Going down is more difficult, the child will master this skill a little later,
  • Children purposefully throw the ball in different directions, kick it with their feet,
  • One and a half year olds still fall a lot. The desire to explore everything around pushes them to perform complex actions, manipulations with their body, which are not yet available to them.


  • The vocabulary is growing every day; on average, 18-month-old children have about 10-20 active words in their vocabulary,
  • The first rudiments of phrases are born - the most active offspring begin to construct small phrases that are understandable only to parents,
  • Most speech is a mixture of babble and onomatopoeia,
  • The passive vocabulary is very large - a little person understands almost everything that adults tell him, reacts violently, emotionally,
  • The child shows body parts, objects and animals in pictures and names them.

Social-emotional sphere:

  • One-and-a-half-year-olds show a keen interest in other people, strive to be in the thick of things (perhaps while remaining on their mother’s lap),
  • The ability to show emotions is formed: to feel sorry for someone, to be happy, sad, angry,
  • Characterized by active imitation of the emotions of adults, with the help of gestures, facial expressions, exclamations,

Despite the obvious desire to expand his social circle, the baby is still very attached to close relatives. He needs to feel his own shoulder nearby, support, confidence that everything will be fine, that nothing will threaten his research, endeavors, and attempts to learn new things. A mother nearby is a guarantor of safety, not a whim.

Height to weight ratio in children

As we have already indicated, height and weight, considered separately, are not informative enough to determine the normal development of a child. Pediatricians are interested in their ratio - the correspondence of a certain height to a certain weight. If they are within normal limits, it means that the child is developing harmoniously; deviations from the norm indicate disorders that may be pathological.

Body mass index for children Quetelet

This is the formula for calculating your height/weight ratio. It doesn't take age into account. This is just the weight in grams divided by the height in centimeters. The Belgian statistician and mathematician Adolphe Quetelet developed an index that indicates the harmonious development of newborns:

Birth weight: height at birth = 60 - 70 The number to the right of the equation shows the index. In the range from 60 to 70 it is harmonious and healthy, and anomalies are pathological.

Example : a child was born with a weight of 3.350 kg and a height of 52 cm - this is normal. But with a height of 56 cm, its mass is too low.

3350 g: 52 cm = 64.4 - normal 3350 g: 56 cm = 59.8 - below normal, the child’s height is below normal 3350 g: 47 cm = 71.2 - above normal, the child is taller than normal

Using this formula, you can always calculate how your child is developing (within what limits). It works during the next months after birth, without taking into account age itself.

And for older children, a Quetelet index below 60 means underweight due to intrauterine malnutrition. For what reason - should be clarified.

The Quetelet index and the calculation formula are valid only for children born during term birth . For premature infants, there are other indices and formulas.

Forecast indices

Other formulas allow you to predict the final growth of a child - they take into account the genetic basis:

Hawker's formula

Boy's height = (father's height + mother's height): 2 + 6.4 cm Girl's height = (father's height + mother's height): 2 - 6.4 cm

Formula for Frame

Boy's height = (Father's Height + Mother's Height X 1.08): 2 Girl's height = (Father's Height x 0.923 + Mother's Height): 2

Smirnov/Gorbunov formula

Boy's height = (father's height + mother's height + 12.5): 2 Girl's height = (father's height + mother's height - 12.5): 2

With this formula, the resulting height changes by +/- 8 cm.

Checking the parameters using specific examples showed that the third formula is closest to reality.

The child’s height/weight is not normal: why, what to do

The real sign of a problem is not a specific indicator that does not correspond to the table, but a general deterioration in the child’s condition + weight problems. Weight loss in combination with any of the following is a worthy cause for concern:

  • The child suffers from severe dermatitis;
  • Its development is periodically disrupted - it becomes chaotic, stops;
  • The child periodically suffers from complications;
  • He gets excited easily or, on the contrary, is too calm.

In the above cases, being underweight is just one symptom of the problem.

When the baby is alert and healthy, deviations from 75% to 125% from the data in the table are not a cause for concern. Variation comes from factors such as genes, food, lifestyle. To make sure your baby is developing properly, check the head circumference as well as the chest circumference. An alarming sign of going beyond the norm is when some indicator reaches an extreme - plus or minus.

Growth disorders in children - why?

Suspicion falls on hormones or pathologies of internal organs, if there are no adverse external effects - for example, injuries, if the child receives proper care and proper nutrition.

  • Problems may be associated with endocrine disorders.
  • Skeletal dysplasia and chromosomal diseases accompanied by short stature.
  • Pathologies of the kidneys, liver and gastrointestinal tract.
  • Indirectly - liver problems.
  • In addition, growth disorders in children include some hereditary forms of pathology, for example, familial short stature.

Subject-manipulative activity

Object activity is the main activity at an early age. A favorite activity at this age is pulling out drawers, opening cabinet doors and throwing the contents onto the floor. But gradually the child begins to realize that the objects around him are objects that can be manipulated.

At the first stage of object activity, the child does not connect the object with the action. He can endlessly bang his spoon on the table or floor. Gradually, the baby begins to understand what each item is intended for. This is the second phase of objective activity. At the age of one year and five months, the child is just at this stage.

Subject educational games

Of the variety of object games for children 1 year 5 months old, the following are recommended:

  • building a tower of 3 – 5 cubes;
  • stringing rings on a rod in a certain order (“Pyramid”),
  • collecting nesting dolls;
  • stringing large beads on a cord;
  • sand games;
  • water games;
  • various sorters in which it is necessary to correlate objects by shape, color and size;
  • puzzles of two halves;
  • games with cars and other vehicles;
  • musical hammers, drums and other sounding toys.

Productive subject activity

During this age period, productive activity begins to form. This includes drawing, modeling, and design.

If the child is already familiar with finger drawing, then you can start drawing classes using pencils, felt-tip pens, and markers. If you are not yet able to paint on your own, then you should draw by placing the baby’s hand in the hand of an adult. Creative activity is formed very individually. Some people already at the age of one year knew how to draw “scrawling dolls” on a piece of paper, others are just starting out. This stage is called the staining stage. Despite this name, the artist’s works are worthy of being framed and displayed on the wall in the main room.

Additional tools you can use:

  • paints,
  • stamps,
  • sponge
  • toothbrushes,
  • thick sticks with cotton wool wrapped around them,
  • cotton pads.

ATTENTION! It is important to ensure that a child at this age learns to draw “from the elbow” and not “from the shoulder.”

In the genre of sculpting, young sculptors, with the help of an adult, can so far only play “sticking sticks”, making holes and indentations in dough or clay.

Construction involves the construction of towers, houses, garages from construction kits with large parts.

Overweight in a child under one year old: why, what to do

Problems usually arise with artificial nutrition. In most cases there are three reasons:

  1. Baby food is not properly selected, does not meet needs, or is not used correctly by parents. for example, the mother thinks that the diluted formula does not taste at all, and to correct this, she adds more mixture than indicated. The child gets extra calories and gains weight with all the health consequences.
  2. Overfeeding - if you act on the principle “the child will not eat more than he needs” - then you are mistaken. In fact, the baby obeys his sucking reflex and absorbs extra calories.
  3. A genetically determined abnormality or nervous system control over the gastrointestinal tract is not developed for some reason.

The specific cause must be determined by a pediatrician.

You should also take into account the following nuances when feeding infants: if regular food does not cause a rash and changes in stool in the child, parents often prematurely begin to give him food from their table in addition to formula.

As a result, some 4-month-old babies are already eating half a banana, others are scratching their gums on a cookie, thereby taking in additional food several times a day. This can result in excess weight, and sometimes in underweight (if nutrition is insufficient).

The problem is not weight, but...

Most of the problems are related to overprotective parents and a number of psychological problems inherent in our culture.

Many grandmothers and mothers believe that a child should be well-fed. Fatness is an indicator of health. They do not take into account that physical indicators are individual, they still tend to compare their child with other children. In our culture, we respect physical strength and people in the body. It is believed that someone else’s child, who is a few grams fatter or a few centimeters taller, is more developed. The mother is probably on a diet, but she feeds the child excessively so that it is no worse than others. And grandmothers who suffered from hunger and poverty want to “provide” the future generation with red cheeks and plump legs.

Mental development

The baby begins to separate from his mother and recognizes himself as a separate, independent person with his own desires and needs. Children of one and a half years are already quite autonomous, they learn to communicate with other children, actively explore the world around them, and practice making independent decisions. The most important acquisitions of the crisis we have just experienced are “no” and “myself.”

The baby becomes capricious, stubborn, he gets angry if something doesn’t work out. Since speech is just beginning to form, the little one cannot explain himself, and parents’ misunderstanding often becomes the reason for real hysterics. It is important for adults already during this period to acquaint their offspring with various feelings and show them how to express their emotions in an environmentally friendly way. Patience and the ability to be supportive are very important right now.

Contrary to established stereotypes, children of two or three years old do not yet know how to manipulate and “do things out of spite” - this is hampered by the developmental features of the cerebral cortex and nervous system. Most of the whims are attempts to get the attention and love of the mother, as well as testing the boundaries of acceptable behavior.

Table of height, weight, age for a boy from one year to 10 years

Growth table by year:

Weight table by year:

Table - weight of girls from 11 to 17 years old

AgeVery low (in kg)Low (in kg)Average (norm) (in kg)Above average (in kg)High (in kg)Very high (in kg)
11 years24.9 to 27.827.8 to 30.730.7 to 38.938.9 to 44.644.6 to 55.2more than 55.2
12 years27.8 to 31.831.8 to 36.036.0 to 45.445.4 to 51.851.8 to 63.4more than 63.4
13 years32.0 to 38.738.7 to 43.043.0 to 52.552.5 to 59.059.0 to 69.0more than 69.0
14 years37.6 to 43.843.8 to 48.248.2 to 58.058.0 to 64.064.0 to 72.2more than 72.2
At the age of 1542.0 to 46.846,8 50,650.6 to 60.460.4 to 66.566.5 to 74.9more than 74.9
16 years45.2 to 48.448.4 to 51.851.8 to 61.361.3 to 67.667.6 to 75.6more than 75.6
17 years46.2 to 49.252.9 to 61.949.2 to 52.961.9 to 68.068.0 to 76.0more than 76.0

Table - Height of girls aged 11 to 17 years

AgeVery low (in cm)Low (in cm)Average (norm) (in cm)Above average (in cm)High (in cm)Very high (in cm)
11 years131.8 to 136.2136.2 to 140.2140.2 to 148.8148.8 to 153.2153.2 to 157.7more than 157.7
12 years137.6 to 142.2142.2 to 145.9145.9 to 154.2154.2 to 159.2159.2 to 163.2more than 163.2
13 years143.0 to 148.3148.3 to 151.8151.8 to 159.8159.8 to 163.7163.7 to 168.0more than 168.0
14 years147.8 to 152.6152.6 to 155.4155.4 to 163.6163.6 to 167.2167.2 to 171.2more than 171.2
At the age of 15150.7 to 154.4154.4 to 157.2157.2 to 166.0166.0 to 169.2169.2 to 173.4more than 173.4
16 years147.8 to 152.6155.2 to 158.0158.0 to 166.8166.8 to 170.2170.2 to 173.8more than 173.8
17 years152.2 to 155.8155.8 to 158.6158.6 to 169.2169.2 to 170.4170.4 to 174.2more than 174.2

Table - Weight of boys aged 11 to 17 years

AgeVery low (in kg)Low (in kg)Average (norm) (in kg)Above average (in kg)High (in kg)Very high (in kg)
11 years26,0 28,028.0 to 31.031.0 to 39.939.9 to 44.944.9 to 51.5more than 51.5
12 years28.2 to 30.730.7 to 34.434.4 to 45.145,1 50,650.6 to 58.7more than 58.7
13 years30.9 to 33.833.8 to 38.038,0 50,650.6 to 56.856.8 to 66.0more than 66.0
14 years34.3 to 38.038.0 to 42.842.8 to 56.656.6 to 63.463.4 to 73.2more than 73.2
At the age of 1538.7 to 43.043.0 to 48.348.3 to 62.862.8 to 70.070.0 to 80.1more than 80.1
16 years44.0 to 48.348.3 to 54.054.0 to 69.669.6 to 76.576.5 to 84.7more than 84.7
17 years49.3 to 54.654.6 to 59.859.8 to 74.074.0 to 80.180.1 to 87.8more than 87.8

Table - Height of boys aged 11 to 17 years

AgeVery low (in cm)Low (in cm)Average (norm) (in cm)Above average (in cm)High (in cm)Very high (in cm)
11 years131.3 to 134.5134.5 to 138.5138.5 to 148.3148.3 to 152.9152.9 to 156.2more than 156.2
12 years136.2 to 140.0140.0 to 143.6143.6 to 154.5154.5 to 159.5159.5 to 163.5more than 163.5
13 years141.8 to 145.7145.7 to 149.8149.8 to 160.6160.6 to 166.0166.0 to 170.7more than 170.7
14 years148.3 to 152.3152.3 to 156.2156.2 to 167.7167.7 to 172.0172.0 to 176.7more than 176.7
At the age of 15154.6 to 158.6158.6 to 162.5162.5 to 173.5173.5 to 177.6177.6 to 181.6more than 181.6
16 years158.8 to 163.2163.2 to 166.8166.8 to 177.8177.8 to 182.0182.0 to 186.3more than 186.3
17 years162.8 to 166.6166.6 to 171.6171.6 to 181.6181.6 to 186.0186.0 to 188.5more than 188.5

Characteristics of physical development during puberty

  • As a rule, girls develop physically until they are 17-19 years old.
  • Boys grow up to 19-22 years old.
  • Intensive growth in girls was observed at the age of 10-12 years.
  • A boy's intensive growth usually begins later - from 13 to 16 years.
  • The growth spurt is explained by the hormonal surge during puberty.
  • The table shows the average indicators of the norm and deviations from it in terms of height and weight of children. It is always necessary to take into account the individual characteristics of the body and genetic predisposition.

The height and weight of the child by month and year are reflected in the standards proposed by WHO. It is important to consider a number of individual factors that influence the physical development of girls and boys. If there is too intense or, conversely, a slow increase in height and weight in children of any age, consult a neurologist, gastroenterologist, or endocrinologist.


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