Average Child Weight by Age

What is the average child weight by age? How do I know if my child’s weight is right for his age? This AptParenting article provides answers to these questions.

Beautiful baby girl minutes after the birth

The growth pattern of children is very specific. Many parents, during the growing years of their children, all through infancy and till the teens, tend to be very worried about the weight of their children. Knowing the average weight by age can help you know whether the growth of your child is taking place at a normal rate or not.

Children grow at different rates all through childhood till adulthood. After birth, it is normal for the weight of the child to drop by 5 – 10%. In the first few months, breast-fed babies can often be heavier than babies that are bottle fed, but this trend tends to reverse later in the first year. An infant’s weight usually doubles between birth and five months, and increases three times by the age of 12 months or one year, and almost quadruples by the end of two years of age.

Factors Affecting Average Child Weight

There are many factors that affect the average child weight and height. These factors are:
➺ The genetic composition of the child plays a vital role in determining his / her weight.
➺ The health of the mother, especially during the pregnancy, also has an effect on the baby’s weight.
➺ The nutrients that the child is getting through his / her food determine his / her weight.
➺ Any kind of illness afflicting the child will adversely affect the weight of the child. If the child suffers from a severe bout of diarrhea, or contracts typhoid fever, then his or her weight tends to drop all of a sudden.

Average Child Weight Chart

The following charts present the details about the average baby weight by age and average child weight by age, along with the normal height of the baby / child at that particular age. The figures in the charts represent averages, and should not be used as accurate indicators of child growth and health.

Average Height and Weight For Boys
Age	Average Height	Average Weight
Age	in Inches	in Pounds
Newborn	19.6	7.4
1 Month	21.6	9.8
2 Months	23.0	12.3
3 Months	24.2	14.1
4 Months	25.2	15.4
5 Months	26.0	16.6
6 Months	26.6	17.5
7 Months	27.2	18.3
8 Months	27.8	19.0
9 Months	28.3	19.6
10 Months	28.8	20.1
11 Months	29.3	20.8
1 year	29.8	21.3
13 Months	30.3	21.8
14 Months	30.7	22.3
15 Months	31.2	22.7
16 Months	31.6	23.2
17 Months	32.0	23.7
18 Months	32.4	24.1
19 Months	32.8	24.6
20 Months	33.1	25.0
21 Months	33.5	25.5
22 Months	33.9	25.9
23 Months	34.2	26.3
2 years	34.2	27.5
3 years	37.5	31
4 years	40.3	36.0
5 years	43.0	40.5
6 years	45.5	45.5
7 years	48.0	50.5
8 years	50.4	56.5
9 years	52.5	63.0
10 years	54.5	70.5
11 years	56.5	78.5
12 years	58.7	88.0
13 years	61.5	100.0
14 years	64.5	112.0
15 years	67.0	123.5
16 years	68.3	134.0
17 years	69.0	142.0
18 years	69.2	147.5
19 years	69.5	152.0
20 years	69.7	155.0

Average Height and Weight For Girls
Age	Average Height	Average Weight
Age	in Inches	in Pounds
Neworn	19.4	7.3
1 Month	21.2	9.6
2 Months	22.1	11.7
3 Months	23.6	13.3
4 Months	24.5	14.6
5 Months	25.3	15.8
6 Months	25.9	16.6
7 Months	26.5	17.4
8 Months	27.1	18.1
9 Months	27.6	18.8
10 Months	28.2	19.4
11 Months	28.7	19.9
1 year	29.2	20.4
13 Months	29.6	21,0
14 Months	30.1	21.5
15 Months	30.6	22.0
16 Months	30.9	22.5
17 Months	31.4	23.0
18 Months	31.8	23.4
19 Months	32.2	23.9
20 Months	32.6	24.4
21 Months	32.9	24.9
22 Months	33.4	25.4
23 Months	33.7	25.9
2 year	33.7	26.5
3 year	37	31.5
4 year	39.5	34.0
5 year	42.5	39.5
6 year	45.5	44.0
7 year	47.7	59.5
8 year	50.5	57.0
9 year	52.5	62.0
10 year	54.5	70.5
11 year	56.7	81.5
12 year	59.0	91.5
13 year	61.7	101.0
14 year	62.5	105.0
15 year	62.9	115.0
16 year	64.0	118.0
17 year	64.0	120.0
18 year	64.2	125.0
19 year	64.3	126.0
20 year	64.3	128.0

Source: The World Health Organization (WHO)

Many parents tend to get very worried if their child’s weight is less than the average weight that children have at that particular age. However, one needs to understand that there are always exceptions, and that a little bit of deviation from what is considered normal is acceptable. In the end, stop worrying, and just enjoy the experience of parenthood!

Disclaimer: The information provided in this article is solely for educating the reader. It is not intended to be a substitute for the advice of a medical expert.