The Average Height for Teenagers

Teen height gets talked about in a funny way. One month, a 13-year-old looks like a child. Six months later, shoes no longer fit, sleeves ride up, and the kitchen doorframe somehow becomes a measuring station. Growth during adolescence is fast, uneven, and honestly a little messy. That is normal.

The average height for teenagers changes a lot between ages 13 and 19 because puberty does not move in a straight line. Girls usually start earlier. Boys usually grow later and for longer. By the late teen years, height gains slow down and then mostly stop. Data from CDC and WHO growth standards helps place those changes into context, but charts are reference tools, not verdicts on health.

This guide breaks down average height by age, compares girls and boys, and explains the biggest factors that shape growth, from genetics and sleep to hormones and nutrition.

What Is the Average Height for Teenagers?

Average teen height depends on two things first: age and sex. A 13-year-old and a 17-year-old are not on the same part of the growth curve, and teen boys and girls usually move through puberty on different schedules.

In the United States, average adult height lands around 69 inches for males and 63.5 inches for females. Most girls reach near-final height around ages 16 to 17. Most boys keep growing until roughly 18 to 19. That gap explains a lot of the confusion parents and teens have when comparing one teenager to another.

Doctors do not look at height alone. They use growth charts, percentile curves, and BMI to see whether overall development is following a healthy pattern. A teen can be shorter or taller than classmates and still be completely within a healthy range.

Here is the part that tends to get missed: growth is not linear. Height does not arrive in neat, equal yearly chunks. Puberty creates bursts, pauses, and awkward stretches where weight, height, appetite, sleep, and mood all seem to change at once.

Average Height for 13-Year-Olds

At age 13, many teenagers are in early or mid-puberty, and that makes this year especially variable.

For 13-year-olds, average measurements are:

At this age, girls are often very close to boys in height and may even appear taller in day-to-day life, despite the averages being close. Puberty usually begins earlier in girls, so the early growth spurt often shows up first there. In real terms, that means a 13-year-old girl may already look more physically mature than a same-age boy who has not hit the same stage yet.

What is happening in the body? Hormonal changes begin driving skeletal growth. Estrogen and testosterone start influencing bone length, body composition, and growth timing. That sounds technical, but in ordinary life it shows up as suddenly outgrown jeans, changing posture, increased appetite, and that odd stage where arms and legs seem to lengthen before the rest catches up.

A practical note worth keeping in mind: one 13-year-old can be average at 5 feet 2 inches, while another can be much shorter or taller and still be healthy. Percentiles matter more than one number in isolation.

Average Height for 14-Year-Olds

Age 14 is often when the gap becomes more noticeable, especially for boys.

By 14, many girls are moving toward the later part of puberty, while many boys are in the middle of a faster acceleration phase. Boys often begin catching up quickly and then passing girls in height. That shift can feel sudden because, well, it usually is.

This is where growth velocity matters. Growth velocity simply means how fast height increases over time. At 14, boys often have a sharper upward climb because bone maturation and hormone activity are intensifying. The endocrine system, which regulates hormones, is doing a lot of heavy lifting here.

The visible difference is not just taller frames. Shoulders may broaden in boys. Body composition starts changing more clearly. Girls may still gain some height, but the rate often begins to slow compared with earlier adolescence.

A small comparison says a lot:

• Girls usually look more advanced earlier, but that lead often shrinks by age 14.
• Boys often enter a stronger upward phase at this point, sometimes seeming to grow overnight.
• Weight changes start tracking with muscle and bone development, not just height.

That pattern surprises families all the time. The timeline feels inconsistent because it is.

Average Height for 15-Year-Olds

At 15, growth remains active, especially for boys.

This age often marks the point where girls are approaching adult height, while boys are still in a strong upward stretch. The average difference between girls and boys becomes much more obvious here.

Peak height velocity often occurs around this stage for boys. In plain language, this is the fastest period of upward growth. Growth plates, the soft areas near the ends of long bones, are still open and active. Skeletal age can differ from calendar age, which is one reason two 15-year-olds can look like they belong in completely different school grades even when they do not.

A lot of people expect a smooth yearly increase. That is not really how this works. At 15, one teen might gain 3 inches in a year. Another might gain almost none because the big spurt already happened earlier. Both patterns can be normal.

Some real-world observations fit this age especially well:

• Appetite often rises sharply during active growth periods.
• Coordination can get weird for a while because the body is adjusting to longer limbs.
• Clothing sizes become unreliable in the most annoying way possible.

That last point is not exactly scientific, but it is usually true.

Average Height for 16-Year-Olds

By age 16, growth often slows for girls, while many boys continue to gain height.

For girls, 16 is often very close to final adult height. Growth plates begin closing earlier in females, so major height gains become less common around this point. Boys, on the other hand, may still be growing at a steady pace.

Bone density also becomes more important during these years. Height gets most of the attention, but strong bone development matters just as much. Hormonal regulation affects both. A teenager can be nearly done growing taller while the body is still building strength, density, and overall maturity.

Here is where comparison gets tricky. A 16-year-old girl who has barely grown in the past year may be developing normally. A 16-year-old boy who suddenly shot up 2 inches may also be developing normally. Same age, completely different pattern.

That difference is one of the biggest reasons doctors rely on charts over casual comparison with classmates, siblings, or cousins.

Average Height for 17-Year-Olds

At 17, most girls have reached final height. Boys may still gain a little more.

The shift at this age is subtle. Girls usually level off. Boys often continue growing, but the pace slows sharply compared with earlier mid-puberty years. That is why 17 can feel like a “nearly there” stage rather than a dramatic one.

Musculoskeletal maturity becomes more relevant now. Adult stature is coming into focus, and genetic height potential has mostly shown itself by this point. That does not mean everyone lands exactly where family height predicts, but family patterns are often visible now in a clearer way.

A useful way to read this age:

• For girls, small or no height change is common.
• For boys, small gains still happen.
• For both, weight may continue changing even after height slows.

That last part matters more than people think. A teen body can keep maturing after the tape measure stops moving much.

Average Height for 18- and 19-Year-Olds

By 18 and 19, most teenagers have reached adult height or are very close to it.

These numbers show the slowdown clearly. Girls are essentially stable in average height from 17 through 19. Boys may gain a very small amount between 18 and 19, especially late maturers, but the major growth period is usually over.

That tiny increase in boys can create a lot of speculation. Is more growth still coming? Sometimes, a little. Most of the time, the dramatic phase is finished. Late growth spurts do happen, but they are usually modest rather than movie-scene dramatic.

The commentary that fits this stage best is simple: late adolescence is less about chasing extra inches and more about understanding where the body has settled.

Teen Girls vs. Boys: Growth Pattern Differences

Girls and boys do not follow the same growth timetable, and that difference explains most height comparisons during adolescence.

Girls usually begin puberty between ages 8 and 13. Boys usually begin between 10 and 13. Because girls tend to start earlier, the first major growth spurt usually arrives earlier too.

Girls

• Earlier growth spurt, often between ages 10 and 14
• Faster early pubertal development
• Earlier slowdown and earlier end to height growth

Boys

• Later growth spurt, often between ages 12 and 15
• Stronger peak growth period
• Longer overall growth window

The most noticeable difference is timing. Girls often look ahead physically in early adolescence. Boys often pass girls later because they grow for longer and usually gain more total height during the strongest years of puberty.

Hormones drive this process. Estrogen helps regulate bone maturation in girls, and testosterone supports the later, stronger growth phase in boys. Tanner stages, which describe physical development during puberty, often explain why same-age teens can look very different from one another.

That mismatch between age and visible development is common. A lot more common than people expect.

Factors That Influence Teen Height

Height reflects a combination of biology, environment, and timing. Genes matter a lot, but they do not act alone.

Genetics

Parental height is one of the strongest predictors of teen height. Tall parents often have taller children. Shorter parents often have shorter children. Not perfectly, of course. Family trends are guides, not guarantees.

Nutrition

Bone growth depends on adequate nutrition. Protein supports tissue growth. Calcium and vitamin D support bones. Iron matters too, especially during rapid development. A balanced diet does not create “extra” height beyond genetic potential, but poor nutrition can limit growth.

Sleep

Deep sleep matters because growth hormone is released during this period. Teenagers who sleep poorly over long periods are not just tired and grumpy. Recovery, hormone rhythm, and growth support all take a hit.

Physical Activity

Weight-bearing activity helps support bone health. Sports, walking, running, and strength-based movement all play a role. This does not mean extreme training makes teens taller. Usually, it just supports healthier development overall.

Health Conditions

Chronic illnesses and endocrine disorders can affect growth. Problems involving the pituitary gland, thyroid, digestion, or long-term inflammation may delay normal height progression. Pediatric endocrinology focuses on these patterns when something looks off.

Some grounded observations make this section easier to use:

• Height is strongly inherited, but sleep and diet shape how well the body uses that blueprint.
• Rapid growth often comes with increased hunger, fatigue, and awkward coordination.
• One slow year does not always mean a problem; sometimes puberty timing is simply later.

That last point gets overlooked a lot. Not every delay is a disorder. But some are, which is why patterns matter.

How to Track Teen Growth Properly

Tracking growth works better with trends than with one-time measurements. A single number can create worry. A pattern across months or years tells the real story.

Doctors usually rely on:

• CDC growth charts
• Height percentile ranking
• BMI calculation
• Annual physical exams

A teen at the 50th percentile is exactly average for that age and sex. A teen at the 25th or 75th percentile may still be perfectly healthy. What matters most is whether the pattern is consistent.

For example, a teenager who has always tracked around the 30th percentile and stays there is often developing normally. A teenager who suddenly drops from the 60th percentile to the 15th percentile may need closer evaluation. The shift matters more than the label.

Measurements also work best when they are consistent. Same posture, no shoes, flat floor, proper wall measurement. Tiny differences in method can make growth look stalled or exaggerated when it is not.

When to Talk to a Doctor

Some growth concerns deserve medical attention, especially when the pattern changes suddenly or puberty seems clearly delayed.

A doctor visit makes sense when:

• Growth stops suddenly
• Puberty has not started by age 14 in boys
• Puberty has not started by age 13 in girls
• Height is far below family growth patterns
• Weight loss, fatigue, or chronic symptoms appear alongside slow growth

A pediatrician may order a bone age X-ray or hormone testing. Bone age scans can show whether skeletal development matches chronological age. That helps separate late but normal growth from a possible growth disorder.

This section is where context matters most. A short teen is not automatically unhealthy. A tall teen is not automatically healthy. Growth concerns are about patterns, timing, and the full picture.

Ideal Height and Weight: Where BMI Actually Fits

People tend to look at height or weight on their own, as if one number can explain everything. It rarely works that way. In practice, those two measurements make more sense together, which is why BMI (Body Mass Index) still gets used. It gives a rough read on weight in relation to height.

For teenagers, though, it gets a little less neat. BMI is not a direct measure of body fat, and it is not read with one fixed adult cutoff. It is judged through age- and sex-based percentiles, because teen growth is messy, fast, and not especially interested in staying predictable.

And that matters more than most people expect.

During the teen years, your body can shift in a matter of months. Muscle comes on. Bone mass changes. Puberty can change shape, pace, and proportions all at once. So a single number may look definitive on paper, while real life says something more complicated.

Most of the time, healthy growth looks more like this:

Steady changes over time
Balanced eating
Regular physical activity
Enough sleep
A stable sense of physical and emotional well-being

BMI helps. It just doesn’t settle the whole question. A teenager can fall into a typical BMI range and still need a closer look for growth concerns. And a teenager outside that range can still be developing normally, depending on body composition, pubertal timing, and overall health.

Conclusion

Teen growth usually speeds up the most between ages 13 and 16, then starts to ease between 17 and 19. Girls often mature earlier and reach adult height sooner. Boys often start later, hit a stronger stretch during mid-puberty, and keep growing longer.

From 13 to 19, the numbers do show a pattern. Just not a rigid one. Growth charts, percentiles, BMI, sleep, nutrition, genetics, and hormones all shape what happens, and not in the same order for everyone. Two teens can be the same age, look nothing alike, and still both land within a healthy range.

That is the part people often miss. These averages are reference points, not rulings. Your growth is tied to biology, timing, and a fair amount of waiting around while your body decides what comes next. And yes, that waiting part tends to feel longest.

Orianna Lux, MS, RDN Medically Reviewed by Expert

Registered Dietitian Nutritionist | Pediatric Growth & Nutrition Specialist

Orianna is a Registered Dietitian Nutritionist with a Master's degree in Human Nutrition and over 8 years of clinical experience specializing in pediatric growth, childhood nutrition, and height development.

MS in Human Nutrition Registered Dietitian Nutritionist (RDN) Pediatric Nutrition Specialist 8+ Years Clinical Experience Evidence-Based Practice

Last updated: April 16, 2026