How tall might your child grow?
Enter both parents' heights — and, if you like, your child's age, height and weight — for an estimate of your child's adult height, with the range most children land in.
The estimate
Enter both parents' heights to see the estimate.
What the number can and can’t tell you
Built on other children
Both methods come from studies of white children in Britain (1970) and the United States (1994). They may fit children elsewhere, including Bangladesh, less closely.
Generations change
Where children grow up taller than their parents’ generation, the parents-only formula can come out low — a 2024 study found exactly that in Korea.
Everyday life matters too
Food, sleep and health all play their part in how a child grows. Genes set a range; they don’t fix a number.
“Double the height at two”?
You may have heard it. There’s no research showing how accurate it is, so this tool doesn’t use it.
When to talk to a doctor
If your child seems to have stopped growing, is much shorter than other children their age, or isn't following your family's pattern, a doctor can measure them over time and check. This tool can't do that, and it isn't medical advice. It has not yet been reviewed by a clinician.
Sources
- Khamis & Roche — Predicting adult stature without using skeletal age: the Khamis-Roche method (Pediatrics, 1994)
- Tanner, Goldstein & Whitehouse — Standards for children's height at ages 2–9 years allowing for height of parents (Archives of Disease in Childhood, 1970)
- Tanner's target height formula underestimates final adult height in Korean adolescents and young adults (2024)
- Teitelbaum et al. — Inaccuracy of stated versus measured parental heights (Clinical Pediatrics, 2005)
Try it with your own child
ParentMind keeps a short note of each day and shows, in your child's own numbers, whether a change is helping.
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