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Calculator for teens

How tall will I be?

Your height
ftin
Mother's height
ftin
Father's height
ftin

Your result

[ — – — ]

Shown as a 90% range: the adult height lands inside it 9 times out of 10. Heights and weight are never sent anywhere.

Short answer

Your adult height is mostly set by your parents' heights, then nudged by how much growing you have left. Fill in the calculator above to get your predicted adult height range. Most boys finish growing around 16 to 18 and most girls around 14 to 16, so the younger you are, the more of your range is still open.

Reviewed · 4 sources · Not medical advice

What decides how tall you'll be

  1. Your parents. Genes explain most of the height difference between people. That sets your range.
  2. Your timing. Early developers shoot up first and stop sooner; late bloomers catch up later. Timing changes when you grow, rarely where you finish.
  3. Your habits. Sleep, food and overall health during the growth years decide whether you reach the top of your range or fall short of it.

Typical growth by age

BoysGirls
Growth spurt usually starts11–139–11
Fastest growth~13–14~11–12
Most stop growing16–1814–16

Ranges vary by a couple of years in healthy teens. Sources: KidsHealth, HSS.

By age

How tall will I be at 12?How tall will I be at 13?How tall will I be at 14?How tall will I be at 15?How tall will I be at 16?How tall will I be at 17?How tall will I be at 18?

Make the most of the growth you have left

Sleep 8 to 10 hours. Growth hormone is released in its biggest pulse early in deep sleep, so short nights cost you more than tiredness. Eat enough, with protein at every meal, plus calcium and vitamin D. Stay active, and stand up straight: a slouch hides centimetres you already have. Our how to grow taller guide covers what works and what is a myth.

Questions people ask

How tall will I be if my parents are short?

Parents' heights are the strongest single predictor, but children regularly end up taller than both parents, especially when they sleep and eat better through their teens than their parents did. Your range already accounts for both parents.

How tall will I be at 14, 15 or 16?

The calculator predicts adult height, not height at a given age. Between now and then, boys typically grow fastest around 13 to 14 and girls around 11 to 12. If you're 14 and haven't had your growth spurt, most of your growth may still be ahead of you.

Am I done growing?

If your height hasn't changed in 6 to 12 months and you're past the typical age (about 16 to 18 for boys, 14 to 16 for girls), you are probably close. A doctor can confirm with a hand X-ray. Our growth plates guide lists the signs.

Will I be taller than my dad?

Enter your numbers: if the top of your range is above your dad's height, you have a real chance. Boys' predictions usually land a few centimetres either side of their father.

Is a height quiz accurate?

Quizzes that ask about shoe size or favourite food are entertainment. This calculator uses a published pediatric formula with known error, so the range is honest about how accurate it is.

Sources

  1. Khamis HJ, Roche AF. Predicting adult stature without using skeletal age: the Khamis-Roche method. Pediatrics 1994;94(4):504–507 (erratum 1995;95:457)
  2. Nemours KidsHealth. Growth and your 13- to 18-year-old
  3. Hospital for Special Surgery. Is it possible to predict a child's adult height?
  4. Jelenkovic A, et al. Genetic and environmental influences on adult human height across birth cohorts from 1886 to 1994. eLife 2016;5:e20320

Your exact number and a daily plan

TallPath runs the same prediction from a 2-minute quiz, shows where you'll likely land inside the range, and builds a daily sleep, food and posture plan around it.

Open this page on your phone, or pick your store:

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