Weight for boys at 6 years
At 6 years, the median weight for boys on the CDC 2000 growth charts is 20.7 kg (45 lb 9 oz): half of boys this age weigh less and half more. The middle half of boys, from the 25th to the 75th percentile, falls between 18.9 and 22.8 kg, a spread of 3.91 kg. The outer lines of the chart, the 3rd and 97th percentiles, sit at 16.4 and 28.1 kg.
Since 5 years, the median has risen by 2.29 kg over 1 year. By 7 years it reaches 23.1 kg.
For girls at 6 years the median is 20.2 kg, 0.44 kg less than for boys, 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 boy at 6 years who weighs 22.0 kg is at about the 67th percentile, meaning that out of 100 boys this age, about 67 weigh less.
Percentiles at 6 years
Download CSV (all ages)| Percentile | z-score | Metric | Imperial |
|---|---|---|---|
| 3rd | −1.88 | 16.43 kg | 36 lb 4 oz |
| 5th | −1.64 | 16.86 kg | 37 lb 3 oz |
| 10th | −1.28 | 17.58 kg | 38 lb 12 oz |
| 25th | −0.67 | 18.92 kg | 41 lb 11 oz |
| 50th (median) | 0.00 | 20.68 kg | 45 lb 9 oz |
| 75th | +0.67 | 22.83 kg | 50 lb 5 oz |
| 90th | +1.28 | 25.20 kg | 55 lb 9 oz |
| 95th | +1.64 | 26.88 kg | 59 lb 4 oz |
| 97th | +1.88 | 28.10 kg | 61 lb 15 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).