BMI for boys at 19 years
At 19 years, the median BMI for boys on the CDC 2000 growth charts is 22.5 kg/m²: half of boys this age have a lower BMI and half a higher one. The middle half of boys, from the 25th to the 75th percentile, falls between 20.7 and 24.8 kg/m², a spread of 4.1 kg/m². The outer lines of CDC’s BMI-for-age chart, the 5th and 95th percentiles, sit at 18.7 and 29.7 kg/m².
Since 18 years, the median has risen by 0.6 kg/m² over 1 year. By 20 years it reaches 23.0 kg/m².
For girls at 19 years the median is 21.5 kg/m², 0.9 kg/m² less than for boys, which is why the charts are drawn separately by sex.
CDC uses BMI-for-age, not weight-for-length, from age 2. At 19 years the 85th percentile for boys is 26.3 and the 95th is 29.7 kg/m². Above the 95th percentile, CDC's 2022 extended charts replace the original curve, so the 99th percentile here is 38.6 kg/m², computed with the extended method.
Reading the table: a boy at 19 years with a BMI of 24.0 kg/m² is at about the 68th percentile, meaning that out of 100 boys this age, about 68 have a lower BMI.
Percentiles at 19 years
Download CSV (all ages)| Percentile | z-score | BMI |
|---|---|---|
| 3rd | −1.88 | 18.3 kg/m² |
| 5th | −1.64 | 18.7 kg/m² |
| 10th | −1.28 | 19.4 kg/m² |
| 25th | −0.67 | 20.7 kg/m² |
| 50th (median) | 0.00 | 22.5 kg/m² |
| 75th | +0.67 | 24.8 kg/m² |
| 85th | +1.04 | 26.3 kg/m² |
| 90th | +1.28 | 27.6 kg/m² |
| 95th | +1.64 | 29.7 kg/m² |
| 97thextended | +1.88 | 33.3 kg/m² |
| 98thextended | +2.05 | 35.6 kg/m² |
| 99thextended | +2.33 | 38.6 kg/m² |
Above the 95th percentile, values use CDC’s 2022 extended BMI-for-age method; z-scores shown are the matching normal z. Values computed with the LMS method from the published tables (retrieved 2026-10-05).