Content of article
Baby
| Age | Size | Boys | Girls |
|---|---|---|---|
| Birth | Weight | 6.7 — 8.1 pounds | 6.5 — 7.8 pounds |
| Length | 19.1 — 20.1 inches | 18.9 — 19.8 inches | |
| 3 months | Weight | 13.0 — 15.2 pounds | 11.8 — 14.0 pounds |
| Length | 23.6 — 24.7 inches | 23.0 — 24.1 inches |
Quick tip: For babies born prematurely, use gestational age (not age since birth) when you look up their numbers in this chart.
| 6 months | Weight | 16.2 — 18.8 pounds | 14.8 — 17.5 pounds |
| Length | 26.1 — 27.2 inches | 25.3 — 26.5 inches |
Fast fact: By age 6 months, most babies have doubled their birth weight.
| 9 months | Weight | 18.2 — 21.1 pounds | 16.7 — 19.7 pounds |
| Length | 27.7 — 28.9 inches | 27.0 — 28.3 inches |
Big Kid
| Age | Size | Boys | Girls |
|---|---|---|---|
| 5 years | Weight | 37.5 — 44.7 pounds | 36.3 — 44.0 pounds |
| Height | 41.7 — 44.2 inches | 41.3 — 43.8 inches | |
| 6 years | Weight | 41.9 — 50.6 pounds | 40.8 — 50.0 pounds |
| Height | 44.2 — 46.9 inches | 43.9 — 46.7 inches | |
| 7 years | Weight | 46.5 — 56.8 pounds | 45.6 — 56.6 pounds |
| Height | 46.6 — 49.5 inches | 46.5 — 49.4 inches | |
| 8 years | Weight | 51.5 — 63.6 pounds | 50.9 — 64.3 pounds |
| Height | 48.9 — 52.0 inches | 48.8 — 51.9 inches |
Learn more:
What growth chart numbers really mean
Child Growth Chart Calculator
The right way to measure your child
Failure to gain weight
Helping an overweight child
Chart: Average fetal length and weight
Do breastfed babies grow more slowly at first?
I’m worried my baby’s too fat
Back to all timelines »
At each well-child visit, the doctor will weigh and measure your child and tell you his height and weight percentiles. (You can also compute them yourself, using our Growth Percentile Calculator.) Talk with the doctor if you have any concerns about your child’s growth.
The data above comes from the World Health Organization for children under age 2 and the U.S. Centers for Disease Control and Prevention for children age 2 and older.
Child Height Predictor | BabyCenter
Find out how tall your child is likely to be at age 18.
NOTE: 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 above in our calculations.) You may get inaccurate results for children who are exceptionally tall or are already taller than both their parents.
Keep in mind that the BabyCenter Height Predictor is meant to be a fun tool. The result will be a «best guess» but it’s still just that — a guess. If you’re concerned about your child’s growth, talk to his healthcare provider.
What does «percentile» mean in a growth chart?
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 the same as or less than your baby, and 60 percent weigh more.
The higher the percentile number, the bigger your baby is compared to other babies her same age. If your baby is in the 50th percentile for length, that means she falls right in the middle of the pack.
To chart your baby’s growth at home, try our growth percentile calculator.
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.
My baby is only in the 25th percentile. Isn’t that small?
Your baby’s growth chart can give you a general picture of how your baby is developing physically. By comparing your baby’s measurements – weight, length, and head circumference – to those of other children the same age and sex and to these same measurements from previous checkups, your child’s doctor can determine whether your baby is growing in a healthy way.
But don’t get too hung up on your baby’s percentiles. Although the current growth charts are a vast improvement over earlier charts, they’re not the last word on how your baby is doing. The most important thing is that your baby is growing at a steady, appropriate rate over time, not that she’s hit some magic number.
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. The measurements in the WHO charts are based on breastfed infants and infants whose length is measured while they are lying down.
