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Child Height Predictor — Two Standard Methods

Enter the child's age and height plus both parents' heights. You get the mid-parental estimate and the doubling estimate, with the honest range around them.

Quick answer: Estimate your child's adult height free using the standard mid-parental height method plus the doubling rule, with the usual ±8 cm range. A guide, not a medical prediction.

–estimated adult height
–range (±8 cm)
–doubling method

A population average, not a medical prediction. A paediatrician tracking the growth curve over time is always more accurate.

How to use

  1. Enter the child's sex, age and current height.
  2. Enter both parents' heights.
  3. Read both estimates and the range.

About this tool

Two simple methods are used in practice. The mid-parental method averages the parents' heights, adds about 13 cm for a boy or subtracts about 13 cm for a girl, then divides by two; most children land within roughly 8 cm either side of that figure. The doubling method says a boy's height at two years and a girl's at eighteen months roughly doubles by adulthood. Both are population averages — nutrition, sleep, health and timing of puberty move the real number, and a paediatrician tracking the growth curve over time will always beat a single estimate.

FAQ

Is anything stored?
No — the calculation runs in your browser.
How accurate is it?
Within about ±8 cm for most children. It is a population average, not a prediction for one child.
Why 13 cm?
That is the average adult height difference between men and women used in the mid-parental formula.
What affects the real number most?
Nutrition, sleep, overall health and when puberty starts.
Should I worry if my child is off the estimate?
Talk to a paediatrician — what matters is the growth curve over time, not one measurement.
Does it work for toddlers?
The doubling method is designed for exactly that age range.

Questions people ask about Child Height Predictor

Collected from live search results on 31 Aug 2026 (search-engine "people also ask" boxes plus the questions published on ranking pages).

how accurate are child height predictors
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.
how tall will my child be height predictor
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.
can you predict a child's height
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.
how to predict child's height calculator
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.
when is baby height predictor
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.
how accurate is child height predictor
The Toolfyra Child Height Predictor runs entirely in your browser: open it, enter your input and the result appears instantly. No sign-up, no file upload, no watermark, and it works on phones as well as desktop.

People also searched

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