Medically the review by Daniel Bubnis, M.S., NASM-CPT, NASE Level II-CSS, specialty in fitness — composed by Jenna Fletcher top top September 24, 2020

To tell whether a young adolescent has actually a healthy and balanced weight, it can assist to recognize the average for their age and sex. The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females.

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However, past biological sex, countless other determinants influence someone’s load at this age, consisting of their height, body composition, the beginning of puberty, eco-friendly factors, and underlying health issues.

Below, we discover the averages and also the factors that influence them, making use of statistics native the Centers for an illness Control and Prevention (CDC). We likewise describe some health dangers of having actually a weight that is significantly below or over average.

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Biological sex dram a function in weight, and in general, a 12-year-old mrs weighs slightly much more than a masculine of the very same age.

When stating a children weight, a doctor might refer to a statistic that indicates the portion of others that weigh much less or more.

For example, a kid in the 35th percentile weighs much more than 35% of children of the same age and sex. Through the same token, castle weight much less than 65% of these peers.

Below, learn much more about the averages for 12-year-old males and also females.


According to the CDC, the mean weight the a 12-year-old female is 92 pounds (lb), or around 42 kilograms (kg).

Below, uncover the average variety by percentile:

Percentilelbkg (rounded come nearest value)


The CDC report that the mean weight of a 12-year-old masculine is 89 lb, or around 40 kg.

Below, discover the average range by percentile:

Percentilelbkg (rounded come nearest value)

Complications of short or high weight

A doctor might be concerned around the weight and also health of a young adolescent if:

their weight falls past the top or reduced percentiles ~ above the CDC’s expansion chartthere has actually been a drastic readjust in your weight

When your weight falls significantly above or listed below the average, a young adolescent may have a hazard of health complications. We overview some examples below.

Complications of short weight

Doctors may use the expression “failure to thrive” when describing a kid with negative weight acquire or sudden load loss. The expression usually uses to babies and also toddlers, though older kids can additionally have difficulty gaining or keeping weight.

The adhering to are some potential causes of sluggish weight acquire in children:

Premature birth: This have the right to lead come the underdevelopment of specific muscles. Metabolic disorders: These have the right to interfere through the body’s capability to convert food into energy.Financial difficulties: These deserve to make it daunting for parents and caregivers to carry out sufficient food.

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A boy with an extremely low weight might have:

developmental delaysproblems v thinkingbehavioral issuesproblems at schoolbelow-average height

Complications that high weight

Children and young adolescents with overweight or weight problems may have actually an boosted risk of:

anxietylow self-esteem

As the CDC note, youngsters with weight problems are also more likely to build severe obesity and also associated risk factors as adults.