Weight for boys at 18 years
At 18 years, the median weight for boys on the CDC 2000 growth charts is 67.2 kg (148 lb 2 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 60.6 and 75.5 kg, a spread of 14.9 kg. The outer lines of the chart, the 3rd and 97th percentiles, sit at 51.6 and 97.1 kg.
Since 17 years, the median has risen by 2.63 kg over 1 year. By 19 years it reaches 69.1 kg.
For girls at 18 years the median is 56.2 kg, 11.0 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 18 years who weighs 72.2 kg is at about the 67th percentile, meaning that out of 100 boys this age, about 67 weigh less.
Percentiles at 18 years
Download CSV (all ages)| Percentile | z-score | Metric | Imperial |
|---|---|---|---|
| 3rd | −1.88 | 51.61 kg | 113 lb 13 oz |
| 5th | −1.64 | 53.15 kg | 117 lb 3 oz |
| 10th | −1.28 | 55.70 kg | 122 lb 13 oz |
| 25th | −0.67 | 60.60 kg | 133 lb 10 oz |
| 50th (median) | 0.00 | 67.20 kg | 148 lb 2 oz |
| 75th | +0.67 | 75.48 kg | 166 lb 6 oz |
| 90th | +1.28 | 84.97 kg | 187 lb 5 oz |
| 95th | +1.64 | 91.94 kg | 202 lb 11 oz |
| 97th | +1.88 | 97.13 kg | 214 lb 2 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).