Average height by age: how tall children are, year by year

01

Average height by age: the chart

The table lists the WHO median height for each age. Up to 2 years children are measured lying down (length), from 2 years standing up (height), as the WHO standards prescribe.

02

The reference interval around the median

The median marks the middle of the stated reference distribution. The displayed band uses the published values at minus two and plus two z-scores. It is not a pass/fail boundary for an individual child. A result within the band is not proof of health, and a value outside it is not a diagnosis. Use the exact age and appropriate chart for any clinical interpretation.

03

Put your child next to the averages

1. Add your child

   Open Height Studio and choose “Add person”. Enter a name and the height, and pick the child or teen figure.

2. Add the average for the same age

   In “Library” → “People & ages”, add the boy or girl of the same age. Height Studio has the WHO medians from 1 to 18 years.

3. Tap to compare

   Tap your child’s figure: the card shows the difference in centimeters or inches. Save the line-up as a link and measure again in a few months.

04

Match the exact age before comparing

A whole-year table is a summary. A child who has just turned six and one approaching the next birthday do not have exactly the same age. Write the measurement date with the birth date in your own record if a professional needs the precise age; do not publish that identifying information in a comparison link. The library’s named age figures are visual references, not an interpolation service between birthdays. Avoid rounding an age merely to obtain a preferred-looking difference. The WHO resources provide more detailed tables, while selection and interpretation of an appropriate clinical reference belong in the relevant professional context.

05

Do not turn successive medians into a personal forecast

Each age row represents a reference value, not the predicted future of the child standing beside it. Joining several rows does not establish that a particular child will follow that path or reach the final adult value. Likewise, the gap between two group medians does not measure a person’s growth velocity. Keep your own observations labelled separately and do not replace them with the table values. If a health question prompted the comparison, take the measurement record and the question to a clinician instead of using the silhouette difference as a conclusion. The studio supplies an illustration, without choosing a growth chart or making a medical assessment.