Height for girls at 9 years
At 9 years, the median height for girls on the CDC 2000 growth charts is 132.9 cm (52.3 in): half of girls this age measure less and half more. The middle half of girls, from the 25th to the 75th percentile, falls between 128.8 and 137.2 cm, a spread of 8.4 cm. The outer lines of the chart, the 3rd and 97th percentiles, sit at 121.7 and 145.1 cm.
Since 8 years, the median has risen by 5.3 cm over 1 year. By 10 years it reaches 138.0 cm.
For boys at 9 years the median is 133.5 cm, 0.6 cm more than for girls, which is why the charts are drawn separately by sex.
From 2 years CDC recommends its own 2000 growth charts, which draw the 3rd to the 97th percentile; under 2, the WHO charts draw the 2nd to the 98th.
Reading the table: a girl at 9 years who measures 135.5 cm is at about the 66th percentile, meaning that out of 100 girls this age, about 66 measure less. From 2 years this is height measured standing. If a child of 2 or older was measured lying down, CDC subtracts 0.8 cm before comparing.
Percentiles at 9 years
Download CSV (all ages)| Percentile | z-score | Metric | Imperial |
|---|---|---|---|
| 3rd | −1.88 | 121.7 cm | 47.9 in |
| 5th | −1.64 | 123.0 cm | 48.4 in |
| 10th | −1.28 | 125.2 cm | 49.3 in |
| 25th | −0.67 | 128.8 cm | 50.7 in |
| 50th (median) | 0.00 | 132.9 cm | 52.3 in |
| 75th | +0.67 | 137.2 cm | 54.0 in |
| 90th | +1.28 | 141.1 cm | 55.6 in |
| 95th | +1.64 | 143.5 cm | 56.5 in |
| 97th | +1.88 | 145.1 cm | 57.1 in |
CDC 2000 charts draw the 3rd to the 97th percentile. Values computed with the LMS method from the published tables (retrieved 2026-10-05).