How Much Should a 13 Year Old Weigh?

During their teenage years, it is not unusual for your child’s body to change quite dramatically and in a number of ways also. You want to make sure that your child’s body is developing as well as it should do but at the same time, you don’t want to put your child at risk of all the complications that come hand in hand with being obese.

There are problems with trying to work our whether or not your 13 year old is in a bracket considered to be ‘normal’. There are so many hormones rushing through their body that it can be changing at quite a dramatic rate and because of that, there isn’t one thing generally considered to be ‘normal’. Two people could be the same height but completely different in weight and still be classed as ‘normal’.

There are ways that you can work out whether or not your child is healthy. Let’s take a look:

How much should a 13 year old weigh?

In order to work out how much a 13 year old should weigh, you need to know a few other measurements in order to figure out their BMI or Body Mass Index.

how much should a 13 year old weighDuring puberty, there is a wide ratio of what is considered to be a normal height or weight for a 13 year old and it can range from 4 ft 7 to over 6 ft. Some of this will be down to genetics and other factors will include lifestyle and upbringing, diet, exercise, and more.

Girls tend to mature earlier than boys so they will go through their growth spurts at an earlier age. In 2002, studies showed that the average 13 year old girl was 62.6 inches tall – 5 ft 3 inches. Just one year later, at aged 14, the average height for a 13 year old girl was 63.7 inches or 5 ft 4 inches. A lot of change can happen during this time and for some kids, it might take longer than others.

The average weight of a 13 year old girl is between 82 to 137 pounds. The average seems to sit somewhere between 120-125 pounds.

The average weight of a 13 year old boy is between 80 to 135 pounds. The average seems to sit somewhere between 120-125 pounds.

The average height of a 13 year old now is considered to be 58 to 62 inches for boys and 60 to 63 inches for girls.

Weight will depend very much on a large amount of factors especially at this age. The BMI will be based on their height and weight but things like age will need to be taken into account as well as overall health, the body type or build, and even the percentage of body fat. Not one thing can be used to determine ‘normal’ weight.



Adult averages should never be used to measure teenagers because they are likely to be going through a growth spurt and the measurements could prove to be wrong. This could prove dangerous, either putting them into an overweight category when they shouldn’t be, or in an underweight one. This can affect a number of things and these are the years that correct information about food and eating should be learned, as should correct eating habits. If eating healthy isn’t educated, your 13 year old runs the risk of suffering at the hands of being overweight.

Ensuring Your 13 Year Old Is Fit & Healthy 

If you want to make sure that your 13 year old weighs what they should do, it is important to ensure they are eating healthy and getting the right amount of exercise. It is not advisable to put teenagers on a diet when there is no need because this can affect the way they think about their own body image, causing great emotional and mental problems later on in life. At the same time, it is unwise to leave an obese teenager to carry on with their own habits because it will cause them failures and problems with their health later on in life. There are a number of medical conditions linked with obesity – diabetes, heart disease, strokes, and even bone and circulation problems included.

At 13 years of age, a boy should be eating approximately 2414 calories per day. A girl should be eating slightly less – 2223 calories per day.

These figures are considered to be a guide and the amount of calories may need to be changed to allow for weight gain or weight loss where appropriate.

You should encourage your teenager to be eating healthily and this will include at least five portions of fresh fruit and vegetables per day. With smoothies and other drinks now offering at least one portion of this, there is no excuse. Making your own smoothies for breakfast is one of the easiest ways to increase your healthy food intake.

Low-fat options should be considered at all times, not to restrict food but to give a healthy way of eating foods. Learning what to have in moderation is also important so you should educate your child on this. Sugary, high-fat and calorific foods should only be eating in moderation and the younger you start teaching this lesson, the healthier your child is likely to grow up.



When it comes to exercise, you are advised to encourage your 13 year old to participate in an hour’s worth of exercise most, if not all, days of the week. This could be playing with friends in the park or a lesson of physical activity at school. It could also include walking to and from school as long as there is no dilly-dallying. The more exercise is forgotten about during the younger years, the more it will be forgotten about in the older ones too.

464 COMMENTS

  1. Hey, i just turned 13 on the 25th, and I weigh about 105lbs. Im around 5’4, and im wondering if im overweight. My stomach sticks out, and most of the time I have to flex a little bit so i dont look fat in public. Please respond!

    • You are in a healthy weight range. You are not overweight. Most people have extra stomach fat. This is healthy, natural, and a positive. If you want to continue to move your health in a positive direction, then move to a plant based diet. Abstain from consuming processed foods and added sugars. Develop an exercise routine of half an hour a day. Have a great day, Anon!

    • You are in a healthy weight range. Continue to develop a healthy lifestyle. Develop a plant based diet and abstain from processed foods and added sugars. Develop an exercise routine of at least half an hour every day. This will support you at this time and in the future. Continue to keep up the great work. Have a great day, Cora!

    • It is possible that you are in a healthy weight range. The best option is for you to continue to develop a healthy lifestyle. Develop a plant based diet and abstain from consuming processed foods and added sugars. Develop a workout schedule of at least half an hour every day. This will help you at this time and in the future. Have a great day, Athar!

    • It is possible that you are in a healthy weight range. It is possible that you are overweight. It would be helpful for you if you moved toward developing a healthier lifestyle. Develop a plant based diet and abstain from consuming processed foods and added sugars. Develop an exercise routine of at least half an hour every day. This will help you at this time and in the future. Have a great day, Sarah!

    • You may be in a healthy weight range. If you believe that you need to develop a healthier lifestyle, then work in that direction. Develop a plant based diet, and abstain from consuming processed foods and added sugars. Follow a healthy exercise regimen of at least half an hour a day. This will help you at this time and in the future. Have a great day, Alberto!

    • This depends on your height. You may be overweight or underweight. You may also be in a perfectly healthy condition. The best option for you is to develop a healthy lifestyle. Develop a plant based diet and abstain from consuming processed food and added sugars. Attempt to exercise for at least half an hour every day. Have a great day, Alexis!

  2. I am 13 years old and I weight 121 lb and I’m 5’2 I use to weight less but I have started eat more and more food especially junk food i use to do a lot of exercise now I don’t even exercise a lot as I use to can I ask am I okay or do I need to stop eating so much and start eating healthier?

    • It sounds like you have already determined what needs to be done so you can further develop a healthy lifestyle. Avoid eating processed foods, added sugars, and other junk foods. Develop a plant based diet. Develop and maintain an exercise regimen of at least half an hour every day. This will help you at this time and in the future. Have a great day, Melany!

    • You are in a healthy weight range. You do not need to be concerned about drastically losing weight. Simply develop a healthy lifestyle. Develop a plant based diet and abstain from consuming processed foods and added sugars. Develop an exercise regimen of at least half an hour a day. Continue to keep up the great work. Have a great day, Crystal!

    • You are overweight and would be benefited by developing a healthier lifestyle. Establish a plant based diet. Abstain from eating processed foods or added sugars. Develop a healthy exercise regimen of half an hour a day. In time, you will find that you feel healthier and you have additional energy. Feel free to share any thoughts or advice in the future. Have a great day, Michael!

    • You are in a healthy weight range. You will likely lose weight as you gain height. Develop a healthy lifestyle at this time. Eat a plant based diet and avoid processed foods and added sugars. This will help your body grow in a more healthy manner. Develop an exercise regimen of at least half an hour each day. This will ensure that you have plenty of energy. Have a great day, Chase!

    • You are in a healthy weight range. You have room to gain weight if you want to do so. The best way to ensure that you remain healthy is to develop a healthy lifestyle. Develop an exercise regimen of half an hour a day. Avoid processed foods and added sugars. This will help you now and in the future. Have a great day, Bean!

  3. My friend has been worried about her weight and she wanted me to find her some answers. She told me she weighs 164 Ibs, is 5 ft. 4-1/2 inches tall, and is 13 years old. She wanted to know if she is overweight. She feels like everyone’s is thinner than her. Have any answers or suggestions to being healthier?

    • She is a little overweight. It would be beneficial for her to move to a plant based diet. She should abstain from consuming processed foods and added sugars. It would be helpful if she developed a healthy exercise regimen. Half an hour a day, every day, will help her gain more energy and lose weight. This will benefit her at this time and in the future. Have a great day, Anon!

      • I reported this all back to my friend, and she wanted me to relay her thanks, she also wondered if I could ask you one more question. She wants to know what excel uses would be the most efficient. Sit ups? Push ups ? Planks? She doesn’t get much of a chance to run daily because she is so busy. Any more suggestions? Btw, thank u SO much! I have noticed her confidence has boosted a lot!

        • It is great that she feels much more confident. Thank you for sharing this information. Yoga can be highly beneficial and it does not require anyone to run. When finished, the body will be energetic and ready to move. She should look into yoga, and develop a daily exercise regimen. Have have a great day, Anon!

  4. I am 129 lbs and I am 5ft tall and 12 yrs old. Any suggestions on how to get that down to a let weight? Do I need to?

    • The best way for you to lose weight is to develop a healthy lifestyle. Develop a plant based diet and abstain from processed foods and sugars. Develop an exercise routine for thirty minutes a day. This will help you feel better and gain energy. As you become healthier, continue to develop your diet and exercise lifestyle. Have a great day, Zach!

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