It’s impossible to predict the exact height you’ll end up being as an adult — from nutrition to genetics, there are just too many variables to land on a hard number. But the biggest factor is genetics, and paying attention to that can clue you in to how tall you’ll be as an adult.
Parents pass on their freckles, their smile, and their hair to their kids — they pass on their height too. Tall parents tend to make tall kids, short parents tend to make short kids. This is not a universal rule — plenty of people tall enough for the NBA have parents that are 5’2.
If you know both of your biological parents, here’s a quick formula to guess your adult height — add both your parents’ height, divide that number by 2, and subtract two and a half inches. Now you have a ballpark figure of your eventual height.
The rate you’ll get taller can change drastically year to year. The Center for Disease Control (CDC) has a growth chart for girls that lets you check the average height of girls at different ages throughout adolescence.
Most girls start growing rapidly around 10 years old — you might have already hit that initial growth spurt. At 10, girls are 54 inches on average. The average 13-year-old height is 62 inches. That’s an average of 8 inches in three years!
After girls reach 13, growth tends to slow down to about an inch every year: the average 14-year old-height of 63 inches. A year after that they’re already 64 inches — the average height for 15-year-old girls.
Check out the growth chart for girls from The Center for Disease Control (CDC) to check the average height of girls at different ages throughout adolescence. And remember — it’s just an average, don’t worry if your height is different than that’s average for your age.
Do girls grow faster than boys?
The reason? Puberty starts earlier for girls. Like we said, you started puberty around 10. But boys don’t usually start puberty until 12 or 13!
Once puberty kicks in, boys catch up pretty quickly. The average adult height for males is 70 inches, compared to 64 inches for females. Most boys reach their adult height by 16, so by high school the average boy in your class will be taller than the typical girl.
Though genetics is the biggest factor in your height, plenty of others can affect how tall you’ll become. Here’s a list of factors that could cause you to grow at a slower rate than you typically would.
- Genetic conditions
Many genetic conditions can affect your eventual height. For instance, people living with Down syndrome or Turner syndrome tend to be shorter than average.
Eating a healthy diet full of nutrients speeds up your rate of growth, missing the things you need slows it down. Focus on a balanced diet during puberty to make sure your growth isn’t stunted.
- Hormone imbalances
Human growth hormone and thyroid hormone control your growth during puberty; some people naturally have less of these hormones and they will be shorter than average.
- Long term illness
Illnesses like cancer, Celiacs disease, various kidney diseases, and cystic fibrosis slow down your rate of growth — if you have one of these conditions you may end up shorter than average.
This is just a snapshot of what growing taller will look like for many girls. There is no height you are supposed to be at any given age, and if this doesn’t describe your experience exactly you’re completely fine. We hope this gave you an idea of what getting taller will look like for you, and the confidence that whatever happens is completely normal.