How Should Babies Height and Weight Be?

Calculating height and weight in babies is one of the most curious subjects of mothers trying to find out whether their baby is growing properly. In order to help you, we have explained how the baby height and weight development should be according to the months, what to do in the absence of these ratios. We also included examples of baby height and weight charts by gender, let’s get started!

The height-weight ratio in babies differs according to the baby’s gender and the month in which it is located. In other words, the size and weight of the baby boy and girl in the same month are not the same. Physically, boys develop earlier than girls. In order for you to make a more accurate assessment, we have prepared a separate 0-12 month baby boy and girl height and weight chart and we will examine them separately. But before we start, let’s say that every baby’s development is different, and some factors can change the course of development. You should also know that if your baby is premature , he will follow this order a little further behind.

0-12 month baby girl development charts

baby girl weight chart

OhLowest Weightİdeal KiloHighest Weight
Birth2,3 kg3,2 kg4,4 kg
1 month old baby weight3,0 kg4,2 kg5,7 kg
2 month old baby weight3,8 kg5,1 kg6,9 kg
3 month old baby weight4,4 kg5,8 kg7,8 kg
4 month old baby weight4,8 kg6,4 kg8,6 kg
5 month old baby weight5,2 kg6,9 kg9,2 kg
6 month old baby weight5,5 kg7,3 kg9,7 kg
7 month old baby weight5,8 kg7,6 kg10,2 kg
8 month old baby weight6,0 kg7,9 kg10,6 kg
9 month old baby weight6,2 kg8,2 kg11,0 kg
10 month old baby weight6,4 kg8,5 kg11,3 kg
11 month old baby weight6,6 kg8,7 kg11,7 kg
12 month baby weight6,8 kg8,9 kg12,0 kg

baby girl height chart

Ohlowest heightİdeal boytallest height
Birth44.8 cm49.1 cm53.5 cm
1 month old baby size49.1 cm53.7 cm58.2 cm
2 month old baby size52.3 cm57.1 cm61.8 cm
3 month old baby size54.9 cm59.8 cm64.7 cm
4 month old baby size57.1 cm62.1 cm67.1 cm
5 month old baby size58.9 cm64.0 cm69.2 cm
6 month old baby size60.5 cm65.7 cm71.0 cm
7 month old baby size61.9 cm67.3 cm72.7 cm
8 month old baby size63.2 cm67.7 cm74.3 cm
9 month old baby size64.5 cm70.1 cm75.8 cm
10 month old baby size65.7 cm71.5 cm77.2 cm
11 month old baby size66.9 cm72.8 cm78.6 cm
12 months baby size68.0 cm74.0 cm80.0 cm

0-12 month baby boy development charts

baby boy weight chart

OhLowest Weightİdeal KiloHighest Weight
Birth2,3 kg3,3 kg4,6 kg
1 month old baby weight3,2 kg4,5 kg6,0 kg
2 month old baby weight4,1 kg4,5 kg7,4 kg
3 month old baby weight4,8 kg6,4 kg8,3 kg
4 month old baby weight5,4 kg7,0 kg9,1 kg
5 month old baby weight5,8 kg7,5 kg9,7 kg
6 month old baby weight6,1 kg7,9 kg10,2 kg
7 month old baby weight6,4 kg8,3 kg10,7 kg
8 month old baby weight6,7 kg8,6 kg11,1 kg
9 month old baby6,9 kg8,9 kg11,4 kg
10 month old baby weight7,1 kg9,2 kg11,8 kg
11 month old baby weight7,3 kg9,4 kg12,1 kg
12 month baby weight7,5 kg9,6 kg12,4 kg

baby boy height chart

Ohlowest heightİdeal boytallest height
Birth45.5 cm49.9 cm54.3 cm
1 month old baby size50.2 cm54.7 cm59.3 cm
2 month old baby size53.8 cm58.4 cm63.1 cm
3 month old baby size56.7 cm61.4 cm66.2 cm
4 month old baby size59.0 cm63.9 cm68.7 cm
5 month old baby size61.0 cm65.9 cm70.8 cm
6 month old baby size62.6 cm67.6 cm72.6 cm
7 month old baby size64.1 cm69.2 cm74.2 cm
8 month old baby size65.5 cm70.6 cm75.7 cm
9 month old baby size66.8 cm72.0 cm77.2 cm
10 month old baby size68.0 cm73.3 cm78.6 cm
11 month old baby size69.1 cm74.5 cm80.0 cm
12 months baby size70.2 cm75.7 cm81.3 cm

What you need to know about the monthly development of babies

  • 1 month old baby weight can sometimes fall slightly below birth weight. Don’t worry, that means your baby has cleared the swelling in his body. After this process, it can start to grow rapidly.
  • Let’s answer the question of how height and weight should be in babies. The development of boys and girls is different. Generally, boys grow faster than girls. They are also born with a higher birth weight and height.
  • While calculating height and weight in babies; The percentile values ​​used for height, weight and head circumference tell that the baby’s values ​​are high or low when compared to an average of 100 babies. Since their development differs, the values ​​obtained in the calculations of the height and weight percentiles for girls and boys are not the same.
  • The baby grows and develops very quickly in the first 6 months. With the transition to additional food, the 6-month-old baby’s height weight comes to around 7-8 kg. The growth rate slows down a bit after 6 months, but it is still fast. However, after 1 year of age, the speed gradually decreases. Don’t let this scare you, it’s normal.
  • When you examine the baby height and weight chart, you will see that the rate of weight gain decreases, especially after the 8th month. Because as the baby starts to crawl, there will be a gradual decrease in weight. Now the energy he expends will cause him to burn more calories.
  • Height and weight development in infants is also directly related to the diet . Breastfeeding your baby, especially for the first 6 months, and then ensuring that he consumes foods with nutritional value will help him develop regularly.
  • Baby height and weight follow-up should be done by the doctor, especially in the first 2 years. But if we give an average information for 1 year old baby’s height and weight gain , it is expected to gain about 4 kilograms and grow around 30 cm from birth.
  • It is an important criterion that the baby is moving on the same percentile line when looking at the height, weight and head circumference measurements in babies. When looking at the ratios in the percentile tables, if the values ​​of the baby are below 3% or above 97%, he should definitely be under the control of a specialist.

What should you do if your baby’s weight is low?

Do not worry if you have determined that your baby’s weight and height are low according to the month of your baby in your routine doctor’s check-ups and percentile examination. First of all, you need to determine the reasons for this situation. For this, you need to observe your baby closely. The following conditions can affect the height-weight index in infants:

  • anorexia ,
  • Selectivity in transition to additional food ,
  • constipation ,
  • Diarrhea ,
  • iron deficiency ,
  • Other health problems.

During the first year, the baby will encounter different feeding patterns. The transition from breast milk to solid food seriously affects weight gain in infants. In the first place, the baby may not like these foods, which are lumpy and have different flavors, and because he will benefit less from breast milk, his weight may decrease. That’s why you should know what situations to pay attention to when switching to solid food.

If your baby seems to be eating enough and having an appetite, the reason for the weight loss may be a health problem. Your doctor will give you the necessary guidance. You can find the cause of the problem with various examinations and analyzes.

“My baby is not gaining weight!” Worrying that he is worried and giving him high-calorie foods and appetite stimulant drugs may cause his health to deteriorate. You shouldn’t do anything like this without consulting your doctor.

What should you do if your baby is short?

Growth in a healthy baby is usually dependent on genetics. If you and your partner are tall, your baby will probably look like you too. Nutrition and hormonal disorders also trigger short stature, but if this is not the case, genetic reasons should be evaluated.

What should you do if your baby is overweight?

Although chubby babies seem very cute to our eyes, if this situation does not change in the following months, it may mean that there is a problem. Especially;

  • Obesity,
  • Diabetes,
  • Heart diseases,
  • Situations such as malnutrition can cause babies to gain weight.

If no health problems are detected in the doctor’s controls and the baby’s weight is too high according to the values ​​of the developmental chart, the reason for this is most likely malnutrition. Feeding your baby high-calorie foods will cause him to gain more weight than necessary. Especially in our country, rice flour foods that mothers use a lot and sugary snacks given to make the baby happy cause unnecessary weight gain. It can also cause the diseases mentioned above.

Your baby only gets acquainted with the foods you offer him. As long as you do not give sugary, salty and other junk foods, he will not turn to them. That’s why the sooner you introduce him to empty foods, the better! Especially until the age of 1, he should stay away from such foods!

In addition, situations such as putting your baby in front of devices such as television, tablet and phone to calm him down and trying to feed him, and his immobility due to these devices cause weight gain.

Our advice to you will be to give your baby foods with high nutritional value, to keep away from empty foods and to gain a proper nutrition habit.

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