42 month old girl — height and weight
Percentiles from the WHO Child Growth Standards. These describe a population; they do not assess a child.
For a 42-month-old girl, the median height is 99.0 cm and the median weight is 15.0 kg.
Healthy girls at this age span roughly 91.4 cm to 106.7 cm between the 3rd and 97th percentiles — a spread of 15.3 cm. Every one of those children is growing normally.
Height at 42 months
Weight at 42 months
Source: WHO Child Growth Standards (2006). Length/height-for-age and weight-for-age percentile tables (birth to 5 years), WHO Multicentre Growth Reference Study Group. Values are WHO's own published percentile values (LMS-derived), transcribed verbatim from the official WHO Excel percentile tables. Source table.
What these numbers mean
The 50th percentile is the middle of the reference population, not a target to reach. Half of all healthy girls at 42 months measure below it. A child on the 3rd percentile and a child on the 97th percentile are both, on this evidence alone, growing normally.
A note on the measurement. Up to 24 months the WHO tables give recumbent length — the child measured lying down — and from 25 months they give standing height. The two are not interchangeable: the same child measures roughly 0.7 cm shorter standing, and WHO's own tables carry that step. This page shows height, which is the correct measurement for this age.
What a paediatrician actually reads is the shape of the line over time. Children settle onto their own channel and then follow it, and it is a change in that channel — not its height on the page — that prompts a closer look. Two measurements a year apart, plotted, carry more information than any single number compared with this table.
If you are worried about your child's growth, take the measurements to a paediatrician rather than to a website. That is not a disclaimer for our benefit; it is genuinely the only way to read these numbers properly.
Height percentiles across ages — girls
| Age | 3rd | 15th | 50th (median) | 85th | 97th |
|---|---|---|---|---|---|
| Birth | 45.6 | 47.2 | 49.1 | 51.1 | 52.7 |
| 1 mo | 50.0 | 51.7 | 53.7 | 55.7 | 57.4 |
| 2 mo | 53.2 | 55.0 | 57.1 | 59.2 | 60.9 |
| 3 mo | 55.8 | 57.6 | 59.8 | 62.0 | 63.8 |
| 4 mo | 58.0 | 59.8 | 62.1 | 64.3 | 66.2 |
| 5 mo | 59.9 | 61.7 | 64.0 | 66.3 | 68.2 |
| 6 mo | 61.5 | 63.4 | 65.7 | 68.1 | 70.0 |
| 7 mo | 62.9 | 64.9 | 67.3 | 69.7 | 71.6 |
| 8 mo | 64.3 | 66.3 | 68.7 | 71.2 | 73.2 |
| 9 mo | 65.6 | 67.6 | 70.1 | 72.6 | 74.7 |
| 10 mo | 66.8 | 68.9 | 71.5 | 74.0 | 76.1 |
| 11 mo | 68.0 | 70.2 | 72.8 | 75.4 | 77.5 |
| 12 mo | 69.2 | 71.3 | 74.0 | 76.7 | 78.9 |
| 13 mo | 70.3 | 72.5 | 75.2 | 77.9 | 80.2 |
| 14 mo | 71.3 | 73.6 | 76.4 | 79.2 | 81.4 |
| 15 mo | 72.4 | 74.7 | 77.5 | 80.3 | 82.7 |
| 16 mo | 73.3 | 75.7 | 78.6 | 81.5 | 83.9 |
| 17 mo | 74.3 | 76.7 | 79.7 | 82.6 | 85.0 |
| 18 mo | 75.2 | 77.7 | 80.7 | 83.7 | 86.2 |
| 19 mo | 76.2 | 78.7 | 81.7 | 84.8 | 87.3 |
| 20 mo | 77.0 | 79.6 | 82.7 | 85.8 | 88.4 |
| 21 mo | 77.9 | 80.5 | 83.7 | 86.8 | 89.4 |
| 22 mo | 78.7 | 81.4 | 84.6 | 87.8 | 90.5 |
| 23 mo | 79.6 | 82.2 | 85.5 | 88.8 | 91.5 |
| 24 mo | 80.3 | 83.1 | 86.4 | 89.8 | 92.5 |
| 30 mo | 84.0 | 87.0 | 90.7 | 94.3 | 97.3 |
| 36 mo | 87.9 | 91.1 | 95.1 | 99.0 | 102.2 |
| 42 mo | 91.4 | 94.8 | 99.0 | 103.3 | 106.7 |
| 48 mo | 94.6 | 98.3 | 102.7 | 107.2 | 110.8 |
| 54 mo | 97.6 | 101.5 | 106.2 | 110.9 | 114.7 |
| 60 mo | 100.5 | 104.5 | 109.4 | 114.4 | 118.4 |
All figures in centimetres. A dash means the source does not publish that value, and nothing here has been filled in by estimation.
Weight percentiles across ages — girls
| Age | 3rd | 15th | 50th (median) | 85th | 97th |
|---|---|---|---|---|---|
| Birth | 2.4 | 2.8 | 3.2 | 3.7 | 4.2 |
| 1 mo | 3.2 | 3.6 | 4.2 | 4.8 | 5.4 |
| 2 mo | 4.0 | 4.5 | 5.1 | 5.9 | 6.5 |
| 3 mo | 4.6 | 5.1 | 5.8 | 6.7 | 7.4 |
| 4 mo | 5.1 | 5.6 | 6.4 | 7.3 | 8.1 |
| 5 mo | 5.5 | 6.1 | 6.9 | 7.8 | 8.7 |
| 6 mo | 5.8 | 6.4 | 7.3 | 8.3 | 9.2 |
| 7 mo | 6.1 | 6.7 | 7.6 | 8.7 | 9.6 |
| 8 mo | 6.3 | 7.0 | 7.9 | 9.0 | 10.0 |
| 9 mo | 6.6 | 7.3 | 8.2 | 9.3 | 10.4 |
| 10 mo | 6.8 | 7.5 | 8.5 | 9.6 | 10.7 |
| 11 mo | 7.0 | 7.7 | 8.7 | 9.9 | 11.0 |
| 12 mo | 7.1 | 7.9 | 8.9 | 10.2 | 11.3 |
| 13 mo | 7.3 | 8.1 | 9.2 | 10.4 | 11.6 |
| 14 mo | 7.5 | 8.3 | 9.4 | 10.7 | 11.9 |
| 15 mo | 7.7 | 8.5 | 9.6 | 10.9 | 12.2 |
| 16 mo | 7.8 | 8.7 | 9.8 | 11.2 | 12.5 |
| 17 mo | 8.0 | 8.8 | 10.0 | 11.4 | 12.7 |
| 18 mo | 8.2 | 9.0 | 10.2 | 11.6 | 13.0 |
| 19 mo | 8.3 | 9.2 | 10.4 | 11.9 | 13.3 |
| 20 mo | 8.5 | 9.4 | 10.6 | 12.1 | 13.5 |
| 21 mo | 8.7 | 9.6 | 10.9 | 12.4 | 13.8 |
| 22 mo | 8.8 | 9.8 | 11.1 | 12.6 | 14.1 |
| 23 mo | 9.0 | 9.9 | 11.3 | 12.8 | 14.3 |
| 24 mo | 9.2 | 10.1 | 11.5 | 13.1 | 14.6 |
| 30 mo | 10.1 | 11.2 | 12.7 | 14.5 | 16.2 |
| 36 mo | 11.0 | 12.1 | 13.9 | 15.9 | 17.8 |
| 42 mo | 11.8 | 13.1 | 15.0 | 17.3 | 19.5 |
| 48 mo | 12.5 | 14.0 | 16.1 | 18.6 | 21.1 |
| 54 mo | 13.2 | 14.8 | 17.2 | 20.0 | 22.8 |
| 60 mo | 14.0 | 15.7 | 18.2 | 21.3 | 24.4 |
All figures in kilograms. A dash means the source does not publish that value, and nothing here has been filled in by estimation.
Other ages — girls
Questions
What is the average height of a 42-month-old girl?
The median (50th percentile) height for a 42-month-old girl in the WHO Child Growth Standards is 99.0 cm. Half of healthy girls that age measure above that and half below. The 3rd to 97th range is 91.4 cm to 106.7 cm — which is how wide "normal" genuinely is at this age.
What is the average weight of a 42-month-old girl?
The median weight is 15.0 kg, with the 3rd to 97th percentile range running from 11.8 kg to 19.5 kg. Weight varies more than height does at every age, and it responds to a recent illness or a growth spurt far more quickly.
My girl is below the 50th percentile — is that a problem?
No. Half of all healthy children are below the 50th percentile; that is what a median is. Growth is assessed by whether a child is following their own curve consistently over time, together with parental heights, feeding and general development. A paediatrician reading a plotted chart can tell you that. A single measurement compared to a table cannot.
Which chart is this from?
WHO Child Growth Standards. The WHO standards are used in India and internationally for children under five, and describe growth under conditions that do not constrain it.
Percentile values reproduced without modification from the WHO Child Growth Standards. General information only — not medical advice. Growth varies enormously between healthy individuals; a single measurement means little. Discuss any concern about a child's growth with a paediatrician. See data & method for every source, survey round and rounding rule used on this site.