Weight for girls at 12 years
At 12 years, the median weight for girls on the CDC 2000 growth charts is 41.6 kg (91 lb 13 oz): half of girls this age weigh less and half more. The middle half of girls, from the 25th to the 75th percentile, falls between 36.6 and 48.1 kg, a spread of 11.5 kg. The outer lines of the chart, the 3rd and 97th percentiles, sit at 29.9 and 65.6 kg.
Since 11 years, the median has risen by 4.44 kg over 1 year. By 13 years it reaches 45.8 kg.
For boys at 12 years the median is 40.5 kg, 1.17 kg less 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 12 years who weighs 45.5 kg is at about the 66th percentile, meaning that out of 100 girls this age, about 66 weigh less.
Percentiles at 12 years
Download CSV (all ages)| Percentile | z-score | Metric | Imperial |
|---|---|---|---|
| 3rd | −1.88 | 29.88 kg | 65 lb 14 oz |
| 5th | −1.64 | 31.01 kg | 68 lb 6 oz |
| 10th | −1.28 | 32.91 kg | 72 lb 9 oz |
| 25th | −0.67 | 36.59 kg | 80 lb 11 oz |
| 50th (median) | 0.00 | 41.65 kg | 91 lb 13 oz |
| 75th | +0.67 | 48.13 kg | 106 lb 2 oz |
| 90th | +1.28 | 55.71 kg | 122 lb 13 oz |
| 95th | +1.64 | 61.36 kg | 135 lb 4 oz |
| 97th | +1.88 | 65.61 kg | 144 lb 10 oz |
CDC 2000 charts draw the 3rd to the 97th percentile. Values computed with the LMS method from the published tables (retrieved 2026-10-05).