For an 11-year-old, being overweight isn't about a specific number but a BMI-for-age percentile: a child is considered overweight if their Body Mass Index (BMI) falls between the 85th and 95th percentile for their age and sex, meaning they are heavier than 85% but lighter than 95% of other children their age, indicating a need to monitor their weight. A BMI at or above the 95th percentile is considered obesity, while below the 5th percentile is underweight.
They're likely to stand somewhere between 4 and 5 feet tall at this age. Their weight will probably be somewhere between 70 and 100 pounds.
Your child's pediatrician will compare your child's body mass index (BMI) — which measures weight in relation to height — to other children of the same sex and age. Children and teens with a BMI in the 95th percentile or higher may be diagnosed with obesity.
According to the National Institutes of Health, a 12-year-old boy or girl should weigh between 55 and 105 pounds.
The CDC report that the average weight of a 12-year-old male is 89 lb , or about 40 kg.
More significant weight gain is normal during the preadolescent ages of roughly 9 to 12 and adolescence – as a child matures into a young adult. It's not unusual for the body to store fat during this time as it prepares for the rapid growth and changes associated with puberty.
Once parents determine their child's BMI, they should discuss it with their doctor. Children with BMIs between the 85th and 95th percentiles are considered overweight. Children with a BMI above the 95th percentile are considered obese.
Puberty - Increased hormones in a child's body during puberty (between the ages of 10 and 14 for girls and between the ages of 12 and 16 for boys) leads to growth and possible expansion of “baby fat” areas. This typically takes place in girls' belly, breast area and hips. Boys' shoulders will get broader.
For example, if someone is 5'8” and weighs 200 lbs The BMI reading would be 30.4 which would put the person in the obese category.
But over the long term, a person's growth may be affected by not getting enough sleep. That's because growth hormone is normally released during sleep. If someone consistently gets too little sleep (known as "sleep deprivation"), growth hormone is suppressed. Lack of sleep also can affect other hormones.
The average weight for an 11-year-old can vary quite a bit, but generally, it falls between 70 to 110 pounds (about 32 to 50 kg). Keep in mind that factors like height, body composition, and overall health play a big role too!
Tips to help your child reach a healthier weight
BMI between 18.5 and 24.9: you are in a healthy weight range. BMI between 25.0 and 29.9: you are considered to be overweight. BMI equal to 30.0 or above: you are considered to be obese.
At 22% body fat, men often have a softer midsection, less muscle definition, and a healthy but not overly lean look, while women typically appear athletic and toned, with some ab definition visible when flexing and definition in arms and legs, sitting in the "fitness" or "average" range for both genders, though visual appearance varies by individual.
A weight of 70kg can fall within the healthy weight range for various individuals. Height plays a significant role. A shorter individual might find a BMI of 70kg within a healthy range, whereas a taller person could potentially fall into the overweight or even the obesity category using the same metric.
Some factors may be within a family's ability to change, such as eating and physical activity habits. Many other possible factors can't be changed, such those related to genes and hormones. You can help manage or prevent childhood obesity by having your whole family regularly eat balanced meals and snacks.
Obesity is a serious, chronic disease. It can lead to other health problems, including diabetes, heart disease, and some cancers. Obesity is becoming much more common in childhood. Most often, it begins between the ages of 5 and 6 years and in adolescence.
During Puberty Girls Grow Fast and Early
Unlike boys, their fastest rate of growth occurs early in puberty. They also gain more fat than boys in preparation for their menstrual cycle. They go from gaining about 5 pounds a year before puberty, to 12-23 pounds during puberty as shown below.
The 3-3-3 rule for weight loss is a simple, habit-based method focusing on three key areas: 3 balanced meals a day, 3 bottles (or ~1.5L) of water by 3 PM, and 3 hours of physical activity per week, aiming for consistency over complex diets. It simplifies fat loss by establishing rhythm through consistent eating, adequate hydration to support metabolism, and regular movement, promoting sustainable health without intense calorie counting or restrictive rules, says Five Diamond Fitness and Wellness, Joon Medical Wellness & Aesthetics, and EatingWell.
If you gain 2 to 3 pounds a day, or 5 pounds a week, you should see your provider. It's also important to see them if you gain 5% or more of your body weight in a month. This type of unexpected weight gain may be a sign of an underlying health condition.