Weight for girls at 8 years
At 8 years, the median weight for girls on the CDC 2000 growth charts is 25.6 kg (56 lb 8 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 23.0 and 29.0 kg, a spread of 6.03 kg. The outer lines of the chart, the 3rd and 97th percentiles, sit at 19.5 and 38.3 kg.
Since 7 years, the median has risen by 2.87 kg over 1 year. By 9 years it reaches 29.0 kg.
For boys at 8 years the median is 25.6 kg, 0.01 kg 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 8 years who weighs 27.7 kg is at about the 67th percentile, meaning that out of 100 girls this age, about 67 weigh less.
Percentiles at 8 years
Download CSV (all ages)| Percentile | z-score | Metric | Imperial |
|---|---|---|---|
| 3rd | −1.88 | 19.47 kg | 42 lb 15 oz |
| 5th | −1.64 | 20.06 kg | 44 lb 4 oz |
| 10th | −1.28 | 21.06 kg | 46 lb 7 oz |
| 25th | −0.67 | 22.99 kg | 50 lb 11 oz |
| 50th (median) | 0.00 | 25.63 kg | 56 lb 8 oz |
| 75th | +0.67 | 29.01 kg | 63 lb 15 oz |
| 90th | +1.28 | 33.00 kg | 72 lb 12 oz |
| 95th | +1.64 | 36.01 kg | 79 lb 6 oz |
| 97th | +1.88 | 38.30 kg | 84 lb 7 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).