Average Height for a 15-Year-Old Boy
Fifteen is the age where late developers usually start their growth spurt. If your son has been shorter than classmates for years and only now starts pulling up, this is often when it happens. On-timers are past their peak year at this point and slowing down.
The 50th-percentile height for a 15-year-old boy in the U.S. is 169.0 cm (5' 6.5"). Here is what that number actually means, and where your son fits.
Full percentile table for 15-year-old boys
| Percentile | Feet & inches | Centimeters |
|---|---|---|
| 5th | 5' 1.2" | 155.5 |
| 10th | 5' 2.4" | 158.4 |
| 25th | 5' 4.3" | 163.3 |
| 50th (median) | 5' 6.5" | 169.0 |
| 75th | 5' 8.8" | 174.8 |
| 90th | 5' 10.9" | 180.2 |
| 95th | 6' 0.2" | 183.5 |
Where does your son fall?
Enter his current height. See his percentile against CDC data for 15-year-old boys.
Reading the number when late developers finally catch up
The average (50th percentile) height for a 15-year-old boy in the U.S. is 169.0 cm (5' 6.5"). That means about half of 15-year-old boys are taller than this, and half are shorter. It does not mean anything is wrong with a 15-year-old who is taller or shorter, every percentile from about the 3rd to the 97th falls within the range of typical variation.
What is changing physically at age 15
At 15, most boys are well into puberty. Peak growth velocity typically happens in the 13-15 range, so many 15-year-olds are just past their fastest growth year. Others are still climbing.
By 15, the early-developers are winding down and the late-developers are just getting started. Both groups end up at similar adult heights on average, puberty timing shifts when the growth happens, not how much.
What his pediatrician is watching for at this age
Height alone is rarely diagnostic. What pediatricians look for at age 15:
- No signs of puberty by 15 warrants a pediatrician conversation.
- Height below the 3rd percentile with no family explanation.
- Sustained downward percentile crossing over 6-12 months.
- Growth velocity below 1.5 inches per year during active puberty.
If any of these apply, that is a conversation to bring to his next visit, ideally with 6-12 months of measurements in hand.
Frequently asked questions
Is my 15-year-old short?
5' 2" (157 cm) at age 15 is around the 5-10th percentile. Shorter side, worth checking growth trend and family height context.
What if my 15-year-old is tall?
6' 0" (183 cm) at age 15 puts him above the 95th percentile, tall, and likely close to his final adult height.
Do boys still grow after 15?
Yes, most 15-year-old boys still have 2-3 inches of growth left. A minority grow into their early 20s.
How much should a 15-year-old grow in a year?
1-3 inches per year is typical at 15. Growth is starting to slow for early developers.
Height data comes from the CDC 2000 Growth Charts (stature-for-age for boys). This page is parent education, not medical advice or diagnosis. If you have concerns about your 15-year-old's growth, talk to his pediatrician, ideally with 6-12 months of measurements. © 2026 The Growth Path.