What Is the Average Height and Weight for Babies?

After learning fetal weight chart while your baby is still in your womb, as well as how to understand the baby growth chart, you still want to know the average weight and height for babies so that you know clearly if their child is developing properly. 

How large or small they are in comparison to other children the same age? The following charts list the values of kids ranging from the 25th percentile all the way to the 75th percentile for both height and weight. Because of this, the values listed in the charts apply to half of children with a quarter being smaller than these values and a quarter being larger than them.

Average Weight and Height for Newborn and Infants 

At every regular checkup, your child’s doctor will measure and weigh him and let you know which percentiles he fits into. If you are concerned about your child’s height or weight, talk to your doctor about it.

Birth

 

Girls

Boys

Height

18.9 to 19.8 inches

19.1 to 20.1 inches

Weight

6.5 to 7.8 pounds

6.7 to 8.1 pounds

3 Months

 

Girls

Boys

Height

23.0 to 24.1 inches

23.6 to 24.7 inches

Weight

11.8 to 14.0 pounds

13.0 to 15.2 pounds

6 Months

 

Girls

Boys

Height

25.3 to 26.5 inches

26.1 to 27.2 inches

Weight

14.8 to 17.5 pounds

16.2 to 18.8 pounds

9 Months

 

Girls

Boys

Height

27.0 to 28.3 inches

27.7 to 28.9 inches

Weight

16.7 to 19.7 pounds

18.2 to 21.1 pounds

 

Average Weight and Height for Toddlers

By the time children become toddler (or the terrible twos), they are moving more. They are also aware of what surrounds them and themselves as well. Toddlers at this age also have an increasing longing to explore objects that are new and people who are new as well. 

12 Months

 

Girls

Boys

Height

28.5 to 29.8 inches

29.2 to 30.5 inches

Weight

18.2 to 21.4 pounds

19.8 to 22.9 pounds

15 Months

 

Girls

Boys

Height

29.9 to 31.2 inches

30.5 to 31.8 inches

Weight

19.5 to 23.0 pounds

21.1 to 24.5 pounds

18 Months

 

Girls

Boys

Height

31.0 to 32.5 inches

31.7 to 33.1 inches

Weight

20.8 to 24.5 pounds

22.4 to 26.0 pounds

21 Months

 

Girls

Boys

Height

32.1 to 33.8 inches

32.7 to 34.3 inches

Weight

22.0 to 26.0 pounds

23.6 to 27.5 pounds

Average Weight and Height for 2-3 Year Olds

This guide is intended to provide an estimate for common 2-3 year olds developments children reach at this age, but you will need to consider the unique context of your child’s development as you try to anticipate the changes in your child.

2 Year Olds

 

Girls

Boys

Height

33.2-34.9 inches

33.8-35.4 inches

Weight

23.3-27.5 pounds

24.8-28.9 pounds

2 1/2 Year Olds

 

Girls

Boys

Height

34.6-36.6 inches

35.0 - 37.0 inches

Weight

26.7 - 31.1 pounds

27.8 - 32.2 pounds

3 Year Olds

 

Girls

Boys

Height

36.0-38.1 inches

36.5 - 38.6 inches

Weight

28.4-33.4 pounds

29.5-34.3 pounds

Average Weight and Height for 4-5 Year Olds

When your child hits 4 – 5 years of age, they start to become more self confident and independent. This is the stage where they begin to have a greater sense of creativity and self control as well. In terms of 4 and 5 year old development, you will notice that they become more content and can play with their own toys for much longer and are eager to learn and try out new experiences. 

4 Year Olds

 

Girls

Boys

Height

38.6 - 41.0 inches

39.2 - 41.5 inches

Weight

32.2 - 38.5 pounds

33.3 - 39.1 pounds

5 Year Olds

 

Girls

Boys

Height

41.3 - 43.8 inches

41.7 - 44.2 inches

Weight

36.3 - 44.0 pounds

37.5 - 44.7 pounds

Notes: The information about average weight and height for babies is based on the World Health Organization’s data for children younger than two years old and the U.S. Centers for Disease Control and Prevention’s data for those over two.