6 month weight percentile

Baby weight and height tracker growth chart

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By Rebekah Wahlberg

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June 21, 2022

Our growth percentile calculator shows how your baby's size compares with other boys or girls the same age. Just enter your child's weight, height (aka length), and head circumference, and we'll calculate a percentile for each. The number reflects what percentage of kids is larger or smaller than your baby. So if your 3-month-old baby is in the 40th percentile for weight, that means 40 percent of 3-month-old babies weigh less than your baby, and 60 percent weigh more.

Using our baby growth chart

When your baby is first born, you'll have several visits at your pediatrician's office to make sure your baby's growth is on track. Your pediatrician will plot your baby's weight, height, and head circumference on a growth chart.

Don't be concerned if your baby doesn't fall right in the middle of the growth chart, though. There's a wide range of normal, and your baby's measurements now don't necessarily reflect what size they'll be as an adult. It's normal for some children to be in the 10th percentile for weight, while other children are in the 90th percentile. The most important thing is that your baby is growing at a healthy and consistent rate, no matter what percentile they're in.

Our growth percentile calculator is a general educational tool only. It's not the last word on how your child is growing, and it's not a substitute for having a healthcare provider monitor your child's growth at regularly scheduled exams. At these visits, your provider will determine whether your child is following a healthy growth pattern over time.

This tool is for children under age 2 and is based on World Health Organization data for kids in that age group. And if you'd like, you can find out how tall your older child is likely to be with our Child Height Predictor.

Read on to learn more about the measurements healthcare professionals take, and learn how to measure your baby at home.

Baby weight

If you want to see how your baby is growing between doctor visits, here's how to get a fairly accurate weight at home:

• Undress your baby completely (remove their diaper, too) and step on a scale while you're holding them. Record that weight.
• Then, set your baby down and weigh yourself. Subtract your own weight from your combined weight with your baby and record that number.
• This isn't as accurate as weighing your baby at the doctor's office, but it's a good estimate of how much your baby weighs.
• If you're worried about your baby's weight gain, call your baby's pediatrician. They may have you come in for a visit, since it's important to have your baby weighed on a consistent scale that can accurately measure weight in pounds and ounces.

Baby height

Before your baby can stand and walk on their own, their height is often recorded as their "length" – that is, how long they are from the crown of their head to the bottom of their heel while lying down. If you want to measure your baby's length at home between doctor visits, here's how:

• Lay your baby down on a flat surface and stretch a measuring tape from the top of their head to the bottom of their heel. Since babies' knees naturally bend a bit, you may need a second person to stretch out their legs while you take the measurement.
• Record their length to the nearest tenth of a centimeter or inch. (In the hospital, birth length is often recorded in centimeters, but your pediatrician's office will likely record their length in inches. What you do is up to you!) Your record might be a little different than the doctor's, but that's okay.

Baby head circumference

Your baby's healthcare provider will measure their head circumference for the first two years of their life to make sure your baby's brain is growing at a healthy rate.

You can measure your baby's head circumference at home, but it can be hard to do this accurately. Here's how to get a good estimate:

• Wrap a flexible measuring tape around the widest part of your baby's head, just above the eyebrows and ears and around the back where their head slopes out from their neck.
• Take the measurement three times (your baby may be wiggly, which could make getting an accurate measurement tough) and use the largest measurement to the nearest 0.1 centimeter.

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Child height predictor: How tall your child will be

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Curious to find out how tall your child will be when they grow up? We can't see the future, but with a little math and science, we can make a pretty good guess about how tall they'll be when they're 18 – with a margin of error under 2 inches.

This calculator works for children age 2 and up. (Depending on your child's age, we'll use some or all of the information you entered in our calculations.) You may get inaccurate results for children who are exceptionally tall or are already taller than both their parents.

The Height Predictor is meant to be a fun tool, and doesn't guarantee your child will be this height when they grow up. If you're concerned about your child's growth, talk to their healthcare provider.

How to tell how tall your child will be

There are a few different methods of predicting how tall your child will be when they grow up. Our Child Height Predictor tool uses the Khamis-Roche method, which is based on a study conducted in the 1990s with about 400 participants.

The method takes a child's height, weight, and the average height of their parents, then uses ratios to determine how to calculate the child's predicted height at age 18. A previous method also used the child's skeletal age, which is how mature a child's bones are and requires an X-ray. But the Khamis-Roche researchers wanted to find a way parents could predict their child's height without having to get an X-ray taken.

If you want to test out other ways to predict your child's height at home, these are a couple methods you can try:

Two years times two

Children grow a ton in their first few years of life – in fact, their first growth spurt from baby to toddler accounts for about half of their adult height. One simple way to predict how tall your child will be when they grow up is to take their height at age 2 if they're a boy or 18 months if they're a girl and double it. (Girls grow a little faster than boys.)

This method has been around for a long time, but there isn't any scientific research about how accurate it is.

Mid-parental method

Another way to estimate your child's adult height is to add together the height of both parents and divide it by two.

Then, some methods say to add 5 inches if they're a boy and subtract 5 inches if they're a girl; others say to only add or subtract 2 ½ inches. There's a high margin of error with this method – it could be off by 4 inches.

Rebekah Wahlberg

Rebekah Wahlberg is an associate editor at BabyCenter, the world's number one digital parenting resource. She lives in Southern California with her silly dog Booger, where she enjoys hiking, yoga, and watching Netflix when she "should" be reading. Wahlberg is passionate about creating content that helps parents and parents-to-be equip themselves with everything they need to succeed.

how to calculate it based on age and height

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Il children's ideal weight is not an indication of an absolute value: in order to calculate the ideal weight, in fact, several factors must always be taken into account, such as age and relation to height . The growth of a child in the first years of life is very important and is closely related physical activity and healthy eating .

In order for your child to grow healthy , it is useful to know what your ideal weight should be in order to learn how to calculate body mass index and be able to read growth percentile charts . Obviously, to follow the ideal weight of children - since there are no absolute laws - it is always good to be able to consult your trusted pediatrician.

So, let's try to figure it out together how to calculate the ideal weight of children, what it should be according to the tables of the World Health Organization and how to calculate percentiles of height.

How is the ideal weight of children calculated?

To reiterate: the ideal weight of children is not a unique and absolute value of , but only a general indication. What is commonly referred to as ideal weight or ideal weight for children is more of a range of values ​​that indicate what a normal weight should be at a given age. Then don't panic if your child is does not exactly match at the specified weight!

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I several parameters to consider height and, starting from the second year of life, body mass index (also called BMI ) are used to calculate the ideal weight of children. To calculate the body mass index, simply divide the child's weight (in kilograms) by the height (in square meters).

Based on these data it is possible to calculate growth percentile , that is, a reference scale for parameters considered "normal", which is based on growth curves obtained from observation of the population. from birth to 20 years old . Reading percentile tables does not happen immediately: in the following paragraphs we will explain how to do this.

Ideal weight for babies at birth and in the first months of life

The baby should be at a healthy weight at birth of about 3200-3400 grams but can be considered normal weight if it weighs from 2500 to 4500 grams. If the child weighs less than 2500 grams, this must be taken into account. underweight if more than 4500 grams overweight .

Paradoxical as it may seem, in the first days of life, the weight of a child tends to decrease by 5-7% , but - if well fed - return the lost weight before the age of 15 days . From now until the sixth month, it will increase by about 150 grams per week . Accordingly, by the fifth month of age, her weight should be twice as much compared to the birth of .

Ideal weight for children under 10 years of age

From from the first year of life to , the ideal weight of a child is approximately triple the birth weight of . Starting from 18 months Instead, weight gain starts to slow down, with a very normal physiological stop which should not scare parents.

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Between two years (when the weight is equal to four times compared to the birth of ) and 5 years, the weight of the child increases slightly less than 2 kg per year , and starting from 5 years, the growth rate begins to gradually increase, by approximately 2.4 kg per year until puberty.

Height and weight they do not always grow evenly, and this can lead - by about 6 years - to an increase in body mass index (which, as we said, depends on the ratio of weight and height).

Ideal weight tables for girls and boys

In the tables below we report for informational purposes only , the range of ideal weights for boys and girls according to age and relative height indicators. As already mentioned, they are not absolute values, and it is always good to assess the health status and regular growth rate of your child. talk to your pediatrician who will take into account the specific case.

Weight - height chart for girls

age	weight	Length
At birth	2.3 - 4.4 kg	44.7 - 53.6 cm
1 month old girl	3.0 - 5.7 kg	49.0 - 58.2 cm
2 months girl	3.8 - 6.9 kg	52.3 - 61.7 cm
3 months girl	4. 4 - 7.8 kg	54.9 - 64.8 cm
4 months girl	4.8 - 8.6 kg	57.1 - 67.1 cm
5 months girl	5.2 - 9.2 kg	58.9 - 69.1 cm
6 months girl	5.5 - 9.7 kg	60.5 - 71.1 cm
7 months old girl	5.8 - 10.2 kg	62.0 - 72.6 cm
8 months girl	6.0 - 10.6 kg	63.2 - 74.4 cm
9 month old girl	6.2 - 11.0 kg	64.5 - 75.7 cm
10 month old girl	6.4 - 11.3 kg	65.5 - 77.2 cm
11 month old girl	6.6 - 11.7 kg	67.1 - 78.5 cm
12 months girl	6.8 - 12.0 kg	68. 1 - 80.0 cm
15 month old girl	7.3 - 12.9 kg	71.1 - 83.8 cm
18 month old girl	7.8 - 13.8 kg	73.9 - 87.4 cm
21 month old girl	8.2 - 14.6 kg	76.5 - 90.7 cm
24 months girl	8.7 - 15.5 kg	79.0 - 94.0 cm
27 months girl	9.2 - 16.4 kg	80.5 - 96.0 cm
30 months girl	9.6 - 17.3 kg	82.5 - 98.8 cm
33 months girl	10.0 - 18.1 kg	84.3 - 101.6 cm
36 months female	10.4 - 19.0 kg	86.1 - 103.9 cm
4 year old girl	11.8 - 22.6 kg	92. 7 - 112.8 cm
Girl 4 and a half years old	13.54 - 23.08 kg	96.17 - 113.41 cm
5 year old girl	14.34 - 24.94 kg	99.35 - 117.36 cm
Girl 5 and a half years old	15.17 - 26.89 kg	102.56 - 121.32 cm
6 year old girl	16.01 - 28.92 kg	105.76 - 125.25 cm
Girl 6 and a half years old	16.86 - 31.07 kg	108.88 - 129.08 cm
7 year old girl	17.73 - 33.37 kg	111.87 - 132.73 cm
Girl 7 and a half years old	18.62 - 35.85 kg	114.67 - 136.18 cm
8 year old girl	19.54 - 38.54 kg	117.27 - 139.41 cm
Girl 8 and a half years old	20. 53 - 41.45 kg	119.66 - 142.45 cm
9 year old girl	21.59 - 44.58 kg	121.85 - 145.36 cm
Girl 9 and a half years old	22.74 - 47.92 kg	123.92 - 148.26 cm
10 year old girl	23.99 - 51.43 kg	125.96 - 151.29 cm
Girl 10 and a half years old	25.35 - 55.05 kg	128.15 - 154.58 cm
11 year old girl	26.82 - 58.72 kg	130.72 - 158.13 cm
Girl 11 and a half years old	28.38 - 62.36 kg	133.84 - 161.76 cm
12 year old girl	30.02 - 65.9 kg	137.44 - 165.15 cm
Girl 12 and a half years old	31.7 - 69. 26 kg	141.09 - 168 cm
13 year old girl	33.41 - 72.38 kg	144.23 - 170.2 cm
Girl 13 and a half years old	35.09 - 75.2 kg	146.56 - 171.78 cm
14 year old girl	36.7 - 77.69 kg	148.12 - 172.88 cm
Girl 14 and a half years old	38.21 - 79.84 kg	149.11 - 173.63 cm
Girl aged 15	39.59 - 81.65 kg	149.74 - 174.15 cm
Girl 15 and a half years old	40.8 - 83.15 kg	150.15 - 174.51 cm
Girl 16	41.83 - 84.37 kg	150.42 - 174.77 cm
Girl 16 and a half years old	42.67 - 85.36 kg	150. 61 - 174.96 cm
Girl aged 17	43.34 - 86.17 kg	150.75 - 175.1 cm
Girl 17 and a half years old	43.85 - 86.85 kg	150.85 - 175.21 cm
Girls 18 years old	44.25 - 87.43 kg	150.93 - 175.29 cm
18 and a half year old girl	44.55 - 87.96 kg	150.99 - 175.35 cm
Girls 19 years old	44.8 - 88.42 kg	151.04 - 175.4 cm
19 and a half year old girl	44.97 - 88.8 kg	151.08 - 175.44 cm
Girls 20 years old	45.05 - 89.04 kg	151.11 - 175.47 cm

Weight - height chart for children

age	weight	Length
At birth	2. 3 - 4.6 kg	45.5 - 54.4 cm
Child 1 month old	3.2 - 6.0 kg	50.3 - 59.2 cm
Child 2 months	4.1 - 7.4 kg	53.8 - 63.0 cm
Child 3 months	4.8 - 8.3 kg	56.6 - 66.3 cm
Child 4 months	5.4 - 9.1 kg	58.9 - 68.6 cm
Child 5 months	5.8 - 9.7 kg	61.0 - 70.9 cm
Child 6 months	6.1 - 10.2 kg	62.5 - 72.6 cm
Child 7 months old	6.4 - 10.7 kg	64.0 - 74.2 cm
Child 8 months old	6.7 - 11.1 kg	65.5 - 75.7 cm
Child 9 months old	6.9 - 11. 4 kg	66.8 - 77.2 cm
Child 10 months old	7.1 - 11.8 kg	68.1 - 78.5 cm
11 month old child	7.3 - 12.1 kg	69.1 - 80.0 cm
Child 12 months	7.5 - 12.4 kg	70.1 - 81.3 cm
Child 15 months	8.0 - 13.4 kg	73.4 - 85.1 cm
Child 18 months	8.4 - 9.7 kg	75.9 - 88.4 cm
Child 21 months	8.9 - 15.0 kg	78.5 - 91.7 cm
Child 24 months	9.3 - 15.9 kg	80.8 - 95.0 cm
Child 27 months	9.7 - 16.7 kg	82.0 - 97.0 cm
Child 30 months	10.1 - 17. 5 kg	84.1 - 99.8 cm
Child 33 months	10.5 - 18.3 kg	85.6 - 102.4 cm
Child 36 months	10.8 - 19.1 kg	87.4 - 104.6 cm
Child 4 years old	12.2 - 22.1 kg	94.0 - 113.0 cm
Child 4 and a half years old	14.06 - 22.69 kg	97.48 - 114.19 cm
Child 5 years old	14.86 - 24.46 kg	100.33 - 117.83 cm
Child 5 and a half years old	15.67 - 26.32 kg	103.2 - 121.47 cm
Child 6 years old	16.5 - 28.27 kg	106.1 - 125.11 cm
Child 6 and a half years old	17.37 - 30.33 kg	109.03 - 128.74 cm
7 year old child	18. 26 - 32.53 kg	111.95 - 132.33 cm
Child 7 and a half years old	19.17 - 34.88 kg	114.79 - 135.84 cm
Child 8 years old	20.11 - 37.42 kg	117.5 - 139.25 cm
Child 8 and a half years old	21.08 - 40.15 kg	120.04 - 142.53 cm
9 year old child	22.08 - 43.07 kg	122.4 - 145.66 cm
Child 9 and a half years old	23.11 - 46.16 kg	124.59 - 148.65 cm
Child 10 years old	24.19 - 49.42 kg	126.67 - 151.53 cm
Child 10 and a half years old	25.35 - 52.79 kg	128.71 - 154.37 cm
11 year old child	26. 6 - 56.26 kg	130.81 - 157.27 cm
Child 11 and a half years old	27.96 - 59.78 kg	133.1 - 160.35 cm
Child 12 years old	29.47 - 63.31 kg	135.66 - 163.72 cm
Child 12 and a half years old	31.14 - 66.82 kg	138.55 - 167.42 cm
Child aged 13	32.97 - 70.28 kg	141.73 - 171.34 cm
Child 13 and a half years old	34.95 - 73.66 kg	145.12 - 175.25 cm
Child aged 14	37.07 - 76.96 kg	148.53 - 178.82 cm
Child 14 and a half years old	39.28 - 80.16 kg	151.75 - 181.8 cm
15 year old boy	41.52 - 83. 24 kg	154.61 - 184.13 cm
15 and a half year old boy	43.72 - 86.18 kg	156.98 - 185.85 cm
16 year old boy	45.79 - 88.95 kg	158.85 - 187.09see
16 and a half year old boy	47.67 - 91.51 kg	160.25 - 187.99 cm
17 year old boy	49.29 - 93.78 kg	161.27 - 188.63 cm
17 and a half year old boy	50.62 - 95.71 kg	162 - 189.11 cm
Boys 18 years old	51.69 - 97.25 kg	162.5 - 189.46 cm
Boys 18 and a half	52.54 - 98.38 kg	162.85 - 189.72 cm
Boys 19 years old	53.22 - 99.19 kg	163. 08 - 189.92 cm
Boys 19 and a half	53.75 - 99.88 kg	163.24 - 190.08 cm
Boys 20 years old	54 - 100.78 kg	163.33 - 190.19 cm

Height percentiles expressed as weight for height.

To calculate the ideal weight of children we use a percentile, which, as we have already said, is used as a reference scale to establish weight parameters are considered normal , you can download tables with growth percentiles compiled by from this address World Health Organization and consult with them.

Se your child's body mass index is less than the fifth percentile on the value scale, so it is considered a normal weight. If the BMI value is between the 85th and 95th percentile of , then the child will be overweight, and if it is above the 95th percentile of , it will be obese.

to to simplify the consultation of height percentiles, although with a lesser degree of accuracy of the results, the value of the 50th percentile of for artificial age (age + height). However, even in these calculations, 9 is always better.0010 Seek help from your pediatrician.

For more scientific information on the ideal weight of children, you can consult the website of the World Health Organization.

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Height and weight gain for children of the first year of life. Tables

Dear parents, your baby is growing and you are worried about whether he is gaining enough weight and height. For control, there are centile tables for assessing the physical development of children, weight and height indicators. At the same time, you must remember that each baby is individual, he cannot grow according to the textbook. These weight and height recommendations are based on an average number of children and 10% deviation is normal. In addition, the centile corridor from 25% to 75% is an average physical indicator. That is why they say: Physical development is mesosomatic, macrosomatic, microsomatic.

It is important that the weight and height indicators are in the same centile corridor, but no more than two adjacent ones. Then we can talk about harmonious development. If the gap is more than two centile corridors, the development is disharmonious. Then we can think either about an unbalanced diet or about a pathology associated with obesity (paratrophy), or protein-energy deficiency (hypotrophy). In addition, one should not forget about the constitutional characteristics of the child, about genetic predisposition. Therefore, in no case should you compare your child with a neighbor's. To talk about the health of a child, we evaluate his condition according to many criteria. This is neuropsychic development, laboratory examination data, anamnesis, heredity. How many times in my practice have I met children who gained 400-450 g in weight every month, by the year they barely gained 7.8-8 kg. But at the same time, children already at 10 months began to walk, pronounce syllables, and follow complex instructions.

We'll talk about weight and height gain for term babies. In preterm infants, rates of weight gain and height differ according to the degree of prematurity. In addition, children can be born with intrauterine malnutrition.

The tables for girls and boys are different in terms of numerical indicators, but at 1 year of age, these differences are quite minimal.

Centile tables for assessing the physical development of girls from 0 to 12 months.

At the same time, until the age of three months, the child adds 20-30 grams per day daily, respectively, from 140 to 200 per week. If we talk about the average weight gain by months, then it is only 600 g per month, since the child after birth has physiological weight loss (with urine, feces, transition from intrauterine feeding to breastfeeding during the adaptation period), approximately 10% of the weight, which is 200-300 grams.

More often, by 3-4 days, the child restores its original weight, and then there is an increase. But I had a case in practice when the child began to gain weight from the 20th day of life, while the girl was active, reflexes were alive, her appetite was good, she could withstand the night interval, stool 4-5 times a day, urination was sufficient, developed according to age. Therefore, do not worry. Our indicator is the well-being of the child. If the baby is active, eats with appetite, sleep is calm, the skin is clean, physiological functions are not disturbed, be calm, your baby is healthy and not hungry. You see from the table the range of weight per year is from 8 to 13 kg. This is the norm. There is no reason to run to the endocrinologist, genetics, to examine the child.

Or the opposite situation: in the first months of life, a child gains 1-1.5 kg while breastfeeding. If the baby does not have colic, he does not spit up, there are no gastrointestinal manifestations, he is active, the skin is clean, physiological functions are not disturbed - this is also the norm. Remember, as often happens, premature babies quickly gain weight and catch up with their peers by the year. And large babies gain weight more slowly. In my entire thirty-year practice, only two children weighed 14-15 kg by the year, although their parents were large and tall. By the age of three, they weighed almost the same, added only in height, the rest of their peers caught up with them.

It is believed that by 4-4.5 months the child should double the weight, and triple by the end of the year.

It happens that the increase in height and weight goes in leaps, seasonality, unevenness, and sometimes asymmetry of growth are noted. Pediatricians are concerned about the circumference of the head and chest, by 2-3 months they should be equal. Further, the breast grows faster. This is important so as not to miss the pathology.

The younger the child, the faster his growth. In the first 3 months of life, body length increases by 3 cm monthly, in the second quarter by 2.5-2 cm monthly. In the third - 1.5-2 cm, in the fourth - 1 cm monthly. The total increase in height in the first year of life is about 25 cm.

Centile tables for assessing the physical development of boys from 0 to 12 months.