What Age Do Boys Stop Growing?

Summary: Ever wonder what age do boys stop growing? Read this article and find out the growth factors and how to reach maximum height potential!


When Do They Stop Growing

What age do boys stop growing? Boys grow between ages 12 and 16, growing as high as 12 inches in many cases. It is in this age group when boys grow the most.

But when do they stop growing? Get the answers in the following section as well as discover what factors affect growth and things that can be done to help your kid reach his maximum height potential.

Read more: ​What Age Do Girls Stop Growing?

What Age Do Boys Stop Growing?

Boys Grow

As said, growth happens between 12 and 16 (puberty stage) for most boys. Most of the growth takes place in the feet, legs, hands and arms (extremities). This is one of the reasons you might be noticing your kid looking clumsy while familiarizing himself to the different changes in his body.

Signs of Puberty

  • Hair starts growing all over his body, such as in the chest, face and armpits.
  • Vocal chords change, voice deepens and Adam’s apple develops and appears.
  • ​Skin becomes oily, leading to acne conditions.
  • ​Weight gain becomes obvious.
  • Shoulders become broad and the body becomes more muscular by 18 years old.

So to answer the question what age do boys stop growing, it is 18 years old. But in some cases, men grow until 21 years old, while others until 25 years old.

Growth Factors

Several internal and external factors, aside from growth hormones, affect a boy’s height, resulting to different growth patterns.

Growth Hormones

Growth Hormones

[Growth hormones play a huge role in a man’s height development. These are the chemicals responsible for signaling the body when it has to start and stop growing. These hormones are released by a gland within the brain after exercise or while sleeping.]


Food Diets

A poor diet could lead to stunted growth among children, and one factor that causes this is socioeconomic status. It has been noted that children from larger families but lower socioeconomic status grow slower and lighter as compared to children from more privileged homes, according to the British Journal of Preventative and Social Medicine.


Genetics Factor

Children can be predisposed to have the same physical characteristics as their parents have. The genes they inherited from both parents can play a major role in terms of full height potential.Between seven and 20 genes could affect height, according to Stanford University geneticist’s Anne Tecklenburg Strehlow. Gene combination is also the reason children coming from the same family may not have the same height because each child could get a different gene combo from their parents.

Medical Conditions & Medications


Children with pituitary tumors can have a different growth pattern as compared to those who do not.

A John Wayne Cancer Institute’s neurosurgeon, Daniel Kelley, said that pituitary tumors could lead to the release of higher than normal levels of human growth hormone, resulting to gigantism.

Its exact opposite is dwarfism, a condition caused by genetic mutation.

Medications, such as Ritalin, a medicine for “attention deficit hyperactivity disorder”, could cause stunted growth on children, who grow lighter and shorter than their healthy peers do.Severe illness during infancy could also lead to abnormal growth patterns in children. An example was in the 18th and 19th century when children were riddled with disease and infection. As a result, they grew shorter than those who weren’t stricken by disease.

How to Reach Maximum Height Potential



Make sure that you’re including essential nutrients in your kid’s diet to help him grow his fullest potential. See to it that he is getting enough of at least five servings of fruits and vegetables daily. Also, give him foods from all the macronutrient groups, including protein, fats and carbohydrates.

[Unfortunately, teens who believe that they are overweight often skip meals, but it has to be avoided. Otherwise, they will feel lethargic and underperform at school.]

Foods to avoid in the growth years include potato chips, chocolates, tea, soft drinks and coffee as well as those loaded with salt, sugar and fat.


Man doing exercise

Help your kid develop his muscles and grow his full height potential by letting him engage in physical activities, which can also burn excess calories and fat.

Physical activities, such as sports and exercise, can also develop and strengthen his heart and lungs as well as keep him off diseases.

Read more: How To Make Yourself Taller

​Proper posture

Posture Of A Boy

​See to it that your child is sitting and standing with a good posture and avoiding hunching or slumping.


Sleeping man

​During sleep, tissues grow, which is why it is important that you ensure your kid is getting quality sleep lasting from eight to 11 hours daily to stimulate and enhance growth hormone production.

​Other factors

​Steroids, alcohol, caffeine and cigarettes are growth-stunting products that have to be avoided, as they can affect tissue growth and health.


Now you know what age do boys stop growing, along with factors affecting growth and ways you can help your kid reach his full height potential.

In that case, you can have a better idea that giving your kid with proper nutrition and engaging him in exercise can help him grow well and away from diseases that could affect growth in the puberty stage.

But if you think he isn’t growing at a normal rate, you should take him to the pediatrician for proper diagnosis and recommendations.

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