Weight, height, and body size all vary in people, even those of the same age. So, determining the average weight for 13 year olds is a tricky question that cannot be answered in one line.
Various factors determine the weight of humans, teens, or precisely 13 year olds, as this content is mainly based on the info about “13-year-olds”.
“After reading the complete text, you can determine by yourself what weight you are supposed to be at 13 or, as parents, how much your 13-year-old teen should weigh and how to maintain a healthy weight in teenagers.”
What is the Average Weight for 13 Year Olds?
During puberty, children show growth spurts on different levels and can gain muscles, fat, and the bone their bodies also develop leading to an increase the weight.
It shows that the range of “normal” weights, body types, and sizes is massive and wide that will require a detailed explanation.
Before determining the average weight for 13 year olds, you must know that the various factors determine the weight by age, and it varies even in people of the same age group.
“Average weight of a 13 year old is measured using BMI, or Body Mass Index. In this, weight (kg) is divided by height (m).”
Here is the BMI chart, using which you can determine your kid’s healthy weight at the age of 13 years old.
Average weight for 13 year olds
18.5 or less
18.5 to 24.9
25 to 29.9
30 or more
How Much Should a 13 Year Old Weigh?
The average weight for 13 year olds is recommended to be between 74 and 148 pounds for boys and girls. This figure is in lbs.
If we talk about the average weight for 13 year olds in kg, it should be between 34 and 68 pounds for both girls and boys.
According to the recommended average weight for 13-year-olds, the 50th percentile will be 101 lbs. or 45 kg. However, it can vary concerning height as well.
What does weight percentile mean, and how does it matter? Experts and doctors use weight percentile to determine the health of kids. The 50th percentile means, that if 100 kids were weighed, the 50th percentile shows that the 50 other kids had more and 50 others had less weight.
It is also suggested that under the fifth percentile, the doctor may acclaim the kid as underweight.
Now, let’s discuss the average weight of 13 year olds based on gender. Gender-wise, these weights vary.
The average weight for a 13-year-old girl is suggested to be more than that for a 13-year-old boy. This could be because girls reach the age of puberty before boys.
Average Weight for 13 Year Old Boy:
In pounds, the average for a boy at thirteen should lie between 75lbs. to 145lbs, while in kilos, the figure will range between 33 kg to 66kg.
The 50th percentile for this age group lands at 100 pounds or 45kg. It means the kid is underweight because he has less weight than the other 50% of participants.
Average Weight for 13 Year Old Female:
In pounds, the average for females or girls at thirteen should lie between 76lbs. to 148lbs, while in kilos, the figure will range between 34 kg to 67kg.
The 50th percentile for this age group lands at 101 pounds or 46kg. It means the girl is underweight because she has less weight than the other 50% of participants.
FYI: Why do percentiles matter? The percentile shows the growth rate of a child compared to other children in the same age group to find and suggest the pattern of gradual growth.
What is the Average 13 Year Old Body Shape?
At thirteen years of age, the kids attain most of their average height, and the curves start to occur. However, as 13-year-olds are going through puberty and it follows a unique timeline for each child, we cannot claim a specific H x W x M pattern for 13 year olds body shape.
During puberty, children start to gain muscles, fat, and bones and grow as much as 10 inches, developing adult bodies. The changes can be sudden and result in weight gain that may make teens self-conscious because they are adjusting to their new bodies.
So, the average 13 year old body shape and average weight for 13 year olds have a wide range of normal.
Average 13 Year Old Body Shape for Boys:
The sizes of average 13-year-old boys increase, and they start to get pubic hair. The height will increase, so the average weight for 13 year olds. However, having a great height doesn’t mean having more weight.
Due to these changes, the boys will become more conscious of their looks and be sentient about their clothing. Mood swings can also be seen in kids of this age.
However, parents are recommended to encourage physical activities in teens to make them physically and strong and mentally at peace.
Average 13 Year Old Body Shape for Females:
From puberty to adolescence, the average 13 year old body shape for females goes through a lot of changes.
Along with the increase in height and average weight for 13 year olds, the body shape will start to change as well – hips get prominent, waist appear narrower while the buttocks rounder.
You might also experience fat accumulation in the legs and more fat around the hips and legs with a trim waistline. Body curves become pretty prominent at this age.
What is a Good Weight for a 13 Year Old?
Good weight for a 13 year old is hard to determine as an exact figure or digit. This is because the factors determining the weight vary for each child.
Good Weight for a 13 Year Old Boy:
To know the good weight for 13 year old boys, check their height, BMD, and muscle mass.
Good Weight for a 13 Year Old Female:
The same formula goes for girls when it comes to finding a good weight for a 13 year old female.
Factors Influencing Weight
Before moving further, here we’re mentioning the factors influencing weight so you can determine the good weight for 13 year old son or daughter by yourself.
1. Age of Puberty Varies:
The age of puberty is between 8 to 14 years. Some kids enter puberty at eight, and at 13, they might get about to finish puberty and enter adolescence.
Contrarily, some kids enter puberty later and might just be starting to show the signs of being physically mature. So, the good average weight for 13 year olds in the same class will vary.
You must know that the height of kids influences their weight, and at 13, kids show a rapid increase in their size, so their weight can increase too.
However, it is not necessarily crucial that heightened kids are going to weigh more. Other factors count too.
BMD or bone mineral density directly affects the average weight of 13 year olds. For your information, bone size (height) differs from bone density (concentration of minerals in bones). Dense bones add to the pounds.
4. Muscle Mass:
It is good to inform you that muscles weigh more than fat, so muscular 13-year-olds can be heftier than other kids their age. Also, note that it is not necessary to get a muscular body at 13; it also varies, just like puberty.
Genetics play a role too. Kids having hefty parents or grandparents can weigh more than other kids whose parents didn’t have that much fat disposition. Genetics can influence three factors: body shape, size, and the average weight for 13 year olds.
6. Geographical Demographics:
Puberty varies geographically too. The reason could be environmental factors, socioeconomics levels, and cultural practices. So, good average weight for 13 year olds can vary geographically.
What is the Average Height for 13 Year Olds?
Kids attain most of their heights at 13. So, you can determine if the kids are going to be heightened as adults or not. Moreover, you can influence the size of your kids at this age.
For instance, if your son or daughter shows a slow growth pace, you can consult an expert about it and use certain medications and physical activities to influence height.
13 Year Old Boy Average Height:
A 13-year-old boy’s average height should be 154.9 centimeters while 5ft in meters.
13 Year Old Girl Average Height:
A 13-year-old girl’s average height should be 155.4 centimeters or 5.1 in feet and inches.
What is the Average Weight for 13 Year Olds VS Height?
If you are still unable to comprehend or decide the average weight for 13 year olds, here we are explaining the healthy weight of 13 year olds with respect to height.
Average Weight for 5’1 Female Age 13:
The average weight for a 5’1 female age 13 should be:
100 to 131 lbs.
45 to 59 kg.
Average Weight for 5’2 Female Age 13:
The average weight for a 5’2 female age 13 should be:
104 to 135 lbs.
47 to 61 kg.
Average Weight for 5’3 Female Age 13:
The average weight for a 5’3 female age 13 should be:
107 to 140 lbs.
49 to 64 kg.
How Much Should a 5’3 Male Weigh at 13?
The body composition of males is different than the body composition of females. Males have more BMD and more muscle mass. So their height compared to women of their age will be different.
Here are the details on the average weight for 13 year olds, males:
Average Weight for 5’5 Male 13:
The average weight for a 5’5 male at the age of 13 should be:
122 to 150 lbs.
55 to 68 kg.
Average Weight for 5’6 Male Age 13:
The average weight for a 5’6 male at the age of 13 should be:
128 to 156 lbs.
58 to 76 kg.
Average Weight for 5’7 Male Age 13:
The average weight for a 5’6 male at the age of 13 should be:
133 to 163 lbs.
68 to 73 kg.
Check this average weight for 13 year olds VS height table for more info:
Weight (Males) LB.
Weight (Males) KG.
Weight (FM) LB.
Weight (FM) KG
101 – 123
45 – 55
95 – 116
43 – 52
106 – 130
48 – 58
99 – 121
44 – 54
112 – 136
50 – 61
104 – 127
48 – 57
117 – 143
53 – 64
108 – 132
50 – 60
122 – 150
55 – 68
113 – 138
51 – 62
128 – 156
58 – 70
117 – 143
53 – 65
133 – 163
61 – 73
122 – 149
55 – 67
Frequently Asked Questions
Before we end the discussion, here check some FAQs along with their answers related to our discussion on the average weight for 13 year olds:
What is the average BMI for teenage girls?
The average, ideal, or normal good BMI for teenage girls should be between 18.5 and 24.9. A Digit increasing 25 BMI means the teen girl is overweight.
Moreover, if the BMI is equivalent to or exceeds 30, she will be considered obese and must follow various teem-friendly fitness regimes.
What is considered fat for a 13 year old?
A teenager can be considered fat or obese if the BMI exceeds 30.
However, this is an average calculation, and the various factors are going to count when it comes to calculating fat disposition with respect to BMI and average weight for 13 year olds.
If the teenager is healthily heightened, has a good muscle mass, and has strong bone structure, they can be considered healthy with a BMI of 30.
We have added a detailed discussion on the average weight for 13 year olds and tried to explain everything to the readers with the help of tables and images. But if there is still something you couldn’t follow, feel free to comment below.