Baby measurements percentile
Baby weight and height tracker growth chart
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- Baby Development
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Child's name
Date of birth
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Sex
Boy Girl
Date of measurement
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Weight
lb.kg. oz.
Height
in.cm.
Head circumference
cm.in.
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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Baby growth charts: Percentiles, reading a growth chart, and more
Baby growth charts track your child's growth over time and compare it to that of similar babies. Growth charts can show you how your baby's growing and alert your doctor if there's a potential problem. It's easy to get caught up in growth chart percentiles and how your baby measures up, but keep in mind that there's a wide range of normal. Also, what you see on your baby's growth chart now doesn't predict their size as an adult.
What is a baby growth chart?
A baby growth chart is a tool that your baby's doctor will use to track their growth over time and compare it to other babies the same age and sex.
Growth charts were developed using measurements from thousands of children.
At every doctor visit, your baby's healthcare provider will measure:
- Your baby's weight
- Your baby's height/length (measured lying down)
- Your baby's head circumference (measured around the head above the eyebrows)
The doctor will plot these measurements on the growth chart and show it to you. Depending on where the measurements fall on the chart, you can see how your baby's growth compares to that of similar babies.
Your baby's growth chart can give you a general picture of how they're developing physically, and their doctor will use it to determine whether your baby is growing in a healthy way.
But try not to get too hung up on your baby's growth chart – it's not the last word on how your baby is doing. There's a wide range of normal, and your baby's measurements don't mean they'll be short or tall, or fat or skinny, as an adult. The most important thing is that your baby is growing at a steady, appropriate rate over time.
Note: The U.S. Centers for Disease Control (CDC) recommends that doctors use the charts from the World Health Organization (WHO) for the first 24 months of a child's life. After age 2, doctors typically use the CDC's growth charts, which are similar but based on different data.
The charts from both organizations show length in inches and centimeters as well as weight in pounds and kilograms. Both charts also use percentiles, which compare averages of children broken down by age.
How do growth chart percentiles work?
This is easiest to explain by example. If your 3-month-old daughter is in the 40th percentile for weight, that means 40 percent of 3-month-old girls weigh less than your baby, and 60 percent weigh more.
The higher the percentile number, the bigger your baby is compared to other babies the same age. If your baby is in the 50th percentile, that means they fall right in the middle of the pack.
To chart your baby's growth at home, try our growth percentile calculator.
Percentiles in a growth chart aren't like grades in school. A higher percentile isn't better, and a lower percentile doesn't mean there's anything wrong with your baby.
Let's say both parents are shorter than average, and your baby grows up to have the same stature. It would be perfectly normal for them to rank consistently in the 10th percentile for height and weight as they grow up.
What's important to remember is that your doctor is watching how your baby grows, not just how much.
Babies tend to go through rapid growth spurts, during which they might put on a little extra weight or length. Other months they may grow only a fraction of what they normally do. Your child's doctor notes individual peaks and valleys, but they'll be more focused on the overall pattern of growth.
Should I worry about my baby's growth?
It could be cause for concern if your baby's percentile changes significantly. For example, if they're consistently been around the 50th percentile for weight and then suddenly drops into the 15th, your baby's doctor will want to figure out why.
There could be a medical reason for the change that needs further evaluation.
A minor illness or a change in your baby's eating patterns might result in a smaller drop, in which case the doctor may just follow your baby's growth more closely for a while.
If your baby hasn't been sick but their weight gain is slowing down while they're still growing in length, your child's doctor may suggest increasing the number of feedings. You may have to go in for more frequent visits to make sure that your baby starts gaining weight again.
There are times when gaining or losing faster than usual is a good thing. If your baby was underweight, for example, it may be a good sign that they're gaining ounces faster than growing inches.
Also, being at one end of the growth spectrum isn't always a reason to worry. For example, if your baby is very short and both parents are relatively short, then it may be perfectly appropriate for them to be in the lowest 5 percent.
But if your baby is very short and both parents are average height or taller, or if your baby is very slender and both parents are average weight or larger, then the doctor will make sure that there's no problem with the baby's growth (like a hormone deficiency or genetic problem).
Also, if your baby is in the top 5 percent for weight, the doctor will keep an eye on their growth – and possibly counsel you about their feedings – to make sure they aren't at risk for obesity.
If your baby's head measurement is much smaller than average, the doctor will make sure that their brain is growing and developing normally (a baby's brain growth is reflected in the size of their skull). If your baby's head circumference is much larger than average, they'll be further evaluated to make sure that they don't have excess fluid in the brain, a condition called hydrocephalus.
How much does birth weight determine future growth?
Birth weight seems to matter less than you might think. Genes, not newborn weight, generally determine adult size. Petite babies sometimes grow to be strapping adults, and large babies can become slender over the years.
A baby's parents are the best indicator – are you and your partner tall, short, or average? Slender, heavy, or medium? Chances are, your child will be similarly built as an adult.
Union of Pediatricians of Russia
Body weight for age. BOYS
Birth to 5 years (percentiles)
In order to plot points on a graph, it is necessary to understand certain terms related to graphs and the rules for plotting points:
The x-axis is the horizontal coordinate axis at the bottom of the graph, which indicates the age of the child. It is necessary to put dots on the vertical lines corresponding to the full age of the baby.
Y-axis - the vertical coordinate axis on the left side of the graph, which indicates body weight (kg). It is necessary to put points on the horizontal lines corresponding to the body weight with maximum accuracy.
Plotted point – a point on the graph where the straight line coming from the corresponding measurement on the X-axis (age) and the straight line from the measurement on the Y-axis (body weight, kg) intersect.
| Percentile | < 3 | 3-15 | 15-85 | 85-97 | >97 |
| Assessment of physical development | very low | below the average | average (norm) | above average | very high |
Let's analyze the example
The body weight of a girl at the age of 6 months is 5.
5 kg. Let's use the graph "Body weight for age": the point on the graph is below the red curve, which means that the child has insufficient body weight and it is urgent to seek advice from a pediatrician.
Body length/height for age. BOYS
Birth to 5 years (percentiles)
In order to plot points on a graph, it is necessary to understand certain terms related to graphs and the rules for plotting points:
The x-axis is the horizontal coordinate axis at the bottom of the graph, which indicates the age of the child. It is necessary to put dots on the vertical lines corresponding to the full age of the baby.
Y-axis - the vertical coordinate axis on the left side of the graph, which indicates the length of the body / height (cm). It is necessary to plot points on horizontal lines corresponding to body length/height with maximum accuracy.
Plotted point - the point on the graph where the straight line from the corresponding measurement on the X-axis (age) and the straight line from the measurement on the Y-axis (length/height, cm) intersect.
| Percentile | < 3 | 3-15 | 15-85 | 85-97 | >97 |
| Assessment of physical development | very low | below the average | average (norm) | above average | very high |
Let's look at the example
The height of a boy at the age of 2 years is 88 cm. Let's use the graph "Body length / height for age": the point on the graph is located at the level of the 50th percentile, respectively, the height of the child is within the average values for his age.
Body weight to body length.
BOYS
Birth to 2 years (percentiles) 2 to 5 years (percentiles)
Body weight for length/height
In order to plot points on a graph, it is necessary to understand certain terms related to graphs and the rules for drawing points: X-axis - the horizontal coordinate axis at the bottom of the graph, which indicates the length of the body / height of the child (cm). It is necessary to put dots on the vertical lines corresponding to the full age of the baby.
Y-axis - the vertical coordinate axis on the left side of the graph, which indicates body weight (kg). It is necessary to put points on the horizontal lines corresponding to the body weight with maximum accuracy.
Plotted point - a point on the graph where the straight line from the respective measurement on the X-axis (length/height, cm) and the straight line from the measurement on the Y-axis (body weight, kg) intersect.
| Percentile | < 3 | 3-15 | 15-85 | 85-97 | >97 |
| Assessment of physical development | very low | below the average | average (norm) | above average | very high |
Let's look at the example
The girl's body weight is 17 kg, height is 99 cm.
Let's use the "Weight to body length" graph: the point on the graph is between the 50th and 85th percentiles, which means that the physical development of the child is average.
Weight of a child under 2 years old by months: online calculator
Medvisor
Services
Weight norm for a child up to 2 years old
This calculator allows you to calculate the normal weight of a child online depending on age (0-2 years). The percentile parameter is taken as the basis, that is, a comparison of weight / height norms for children of a younger age group
Sex of child
Boy Girl
Age of child
012
years
Age of child
01234567891011
months
You can determine the percentage of weight for a child up to 2 years old
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percent
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Weight of the child up to a year (by month)
Street and weight of children under 1 year old are calculated in accordance with the parameters approved by the World Health Organization.
For convenience, you can also focus on the tables below, or calculate the weight of your child yourself using our online calculator.
Boys weight chart
| Child's age | boys | |
|---|---|---|
| Body mass | ||
| Average | Normal Range | |
| 0 months | 3.5 kg | 3 - 4 kg |
| 1 month | 4.3 kg | 3.6 - 5 kg |
| 2 months | 5.3 kg | 4.5 - 6 kg |
| 3 months | 6.2 kg | 5.5 - 6.9 kg |
| 4 months | 6.9 kg | 6.1 - 7.7 kg |
| 5 months | 7.8 kg | 7 - 8.4 kg |
| 6 months | 8.7 kg | 7.9 - 8.9 kg |
| Seven months | 8.9 kg | 7. 8 - 10.0 kg |
| 8 months | 9.3 kg | 8.2 - 10.4 kg |
| 9 months | 9.8 kg | 8.7 - 11.05 |
| 10 months | 10.3 kg | 9.2 - 11.5 kg |
| 11 months | 10.4 kg | 9.3 - 11.5 kg |
| 12 months | 10.8 kg | 9.4 - 11.9 kg |
Girls weight chart
| Child's age | Girls | |
|---|---|---|
| Body mass | ||
| Average | Normal Range | |
| 0 months | 3.3 kg | 2.8 - 3.8 kg |
| 1 month | 4.1 kg | 3.5 - 4.6 kg |
| 2 months | 5.0 kg | 4.3 - 5.5 kg |
| 3 months | 5.9 kg | 5. 3 - 6.4 kg |
| 4 months | 6.5 kg | 5.8 - 7.1 kg |
| 5 months | 7.2 kg | 6.2 - 8.0 kg |
| 6 months | 7.9 kg | 7.0 - 8.8 kg |
| Seven months | 8.1 kg | 7.2 - 9.1 kg |
| 8 months | 8.3 kg | 7.2 - 9.4 kg |
| 9 months | 9.0 kg | 8.1 - 10.0 |
| 10 months | 9.5 kg | 8.2 - 10.8 kg |
| 11 months | 9.8 kg | 8.9 - 11.0 kg |
| 12 months | 10.1 kg | 9.0 - 11.3 kg |
Calculate the weight and height of a child online by months
The result shows what percentage of babies weigh less. For example, in a sample of 100 babies, a value of 40 means that your baby weighs more than 40 babies and less than the other 60.
