People, who reach 18, are now more independent than ever. They can cast votes, give consent for their vaccines, and determine the average weight for 18 year olds without the intervention of parents.
Eighteen years is considered a mature age, and when reaching this age, teens can apply for ID cards and driving licenses and get their 10 years passports to fly freely anywhere.
However, despite being considered legally mature, the growth of people varies. Even if a person is 18, their bodies can still grow because human development differs for different people.
Therefore, the average weight for 18 year olds can be a vast topic and require detailed discussion.
18 year old weight
18-year-olds are considered officially mature, but physically, your ripe age can vary. As an 18-year-old female, your body might have determined all the physical changes and now have become mature.
However, the bodies of males grow for more time than females, so these might undergo some particular changes while you unwind.
This is why the average weight for 18 year olds varies from person to person.
If you make a list of 20 people of the same age (18) and check their body weight and overall health, all of them will have some changes compared to other participants.
It happens because the definition and numbers of the ideal weight in human beings vary. So how much is an 18-year-old supposed to be, or what can be an ideal average weight for 18 year olds?
How much should an 18 year old weigh?
Body Mass Index, Body Mass Indicator, or BMI is the matrix considered to determine the good weight of a person at their specific age.
“The Center for Disease Control and Prevention (CDC) offers a growth chart based on the ideal BMI. According to this, a BMI between the 5th and 85th percentile is considered good weight for 18 year old.”
BMI is calculated using the average weight for 18 year olds and height.
The weights can vary despite being of the same height or the same age based on gender.
Also, bone mass can change age-wise. For example, a dwarf person of the same size as a child will weigh more than the child.
However, due to their short height, they will weigh less than someone of their age, having a standard size with no dwarfism.
Average weight for 18 year olds
According to CDC height charts, we found that:
- Average weight for 18 year olds guys with 5 feet 9 inches in height should weigh around 54 to 79 kilograms.
- Contrary to this, the average weight for 18 year olds women with 5 feet and 4 inches in height should weigh around 46 to 67 kilograms when she is healthy.
Here you might have noticed another thing women weigh more than males. Right? Well, this is because the bone mass in males is more than it is in women.
Also, their weight will vary height-wise. Someone with 5 feet 8 inches in height will weigh more than someone with 5 feet 4 inches.
Check the BMI table below for more information:
| BMI | Average weight for 18 year olds |
| 18.5 or less | Underweight |
| 18.5 to 24.9 | Ideal |
| 25 to 29.9 | Overweight |
| 30 or more | Obese |
Average weight for 18 year old with 5’8 height
A male of 5 feet 8 inches in height will weigh more than a female of the same size. Once again, as we explained earlier, because of the bone mass.
Based on this, the CDC growth chart explains that:
- Average weight for 18 year olds 5’8 male can be around 139 – 169 lbs. or 63 – 77 kilograms
- Average weight for 18 year olds 5’8 female can be around 126 – 154 lbs. or 57 – 70 kilograms
As long as their BMI is between the 5th and 85th percentile, their weight is healthy. A BMI less than this, will be considered underweight, and more than this be considered overweight.
Average weight for 18 year old 5’4 female
Females have smaller heights than males on average. Moreover, 5 feet 4 inches is considered standard among females, not small.
- A female at such height should weigh around 110 – 140 pounds or 50 – 64 kilograms.
Moreover, the BMI should be between 19 -24 for optimum healthy weight. If the BMI is less than 19 or more than 14, the female will be considered underweight or overweight, respectively.
Average weight for 18 year old male 5’9
5 feet 9 inches is kind of a good height for males. However, as long as they are on a good average weight for 18 year olds, they will be considered healthy.
- A male of 5 feet and 9 inches in height should weigh around 144 – 176 pounds.
- A female of 5 feet and 9 inches in height should weigh around 131 – 160 pounds.
Their BMI should be between 18.5 and 24.9 or 19 – 25 on average.
You can calculate your BMI using CDC calculators for a better understanding if you are at a healthy weight or not.
Healthy weight for 18 year olds
Healthy weight depends on the value obtained using BMI. A BMI between the 5th and 85th percentile is considered a healthy average weight for 18 year olds.
Without BMI, you cannot define a healthy weight for a person because it varies based on numerous factors.
Experts suggest that figures and definitions for a healthy weight ideal for one person might not necessarily be suitable for another person.
Also, weight is not the alone indicator of healthy. Your weight scale is not going to determine if you are at an ideal weight according to your physique.
There are many factors that determine the size and weight of a person.
Factors based on which average weight varies
What are the factors on which average weight for 18 year olds varies? These are given below:
1. Height
You must know that the height of teens influences their weight, and at 18, people might reach their optimum size, so their weight will reach an ideal value too.
However, it is not necessarily crucial that heightened 18 year olds are going to weigh more. Other factors count too.
2. BMD
BMD, or bone mineral density, directly affects the average weight of 18 year olds. For your information, bone size (height) differs from bone density (concentration of minerals in bones). Dense bones add to the pounds more.
3. Muscle Mass
It is good to inform you that muscles weigh more than fat so that muscular 18-year-olds can be heftier than other people their age. Also, note that you can start working out for an athletic body at 18; if you have achieved your ideal height.
Bodybuilding can disrupt your height. How? Click for the complete guide.
4. Genetics
Genetics play a role too. People having hefty parents or grandparents can weigh more than others whose parents didn’t have that much fat disposition. Genetics can influence three factors: body shape, size, and the average weight for18 year olds.
5. Geographical Demographics
Puberty varies geographically too. The reason could be environmental factors, socioeconomic levels, and cultural practices.
But this is not all. Your mental health can also disrupt the good weight ratio. Someone in a good mental health state can weigh well, while someone with disturbing mental health or having stress or anxiety can weigh more.
Stress and anxiety cause weight disposition.
What should 18 year olds do to lose and maintain good weight?
1. Follow a good diet
First, a person in their teens should never go on a restricted diet such as the keto diet or other fad diets. They should follow a healthy eating plan from a professional instead.
2. Organic food consumption
This is for all ages. To maintain average weight for18 year olds and lose fat, one should avoid junk food items and look for organic options like fresh fruits, vegetables, smoothies, and juices.
3. Opt for an active living
Rather than being a couch potato and playing video games all day, a teenager must opt for some activities which require him to walk around the home. Cycling and other outdoor games can help.
If you are working, try going to work on a bike or pedestrian so that you can have some workout without stressing your muscles too much.
4. Work on your mental wellbeing
Lastly, do not think too much about weight and health, as it can lead to eating disorders. You don’t have to be conscious but opt for a lifestyle that is organic and healthy.
These things will help your kids easily lose weight and maintain average weight for 18 year olds.
Bottom Line
Here, our discussion on the average weight for 18 year old comes to an end. We have found that there is no definition for ideal weight. However, Body mass index can determine the perfect weight.
For more parenting information and definitive journals on weight and health, keep visiting us at Look Broad.