Height for boys at 18 years

At 18 years, the median height for boys on the CDC 2000 growth charts is 176.2 cm (69.4 in): half of boys this age measure less and half more. The middle half of boys, from the 25th to the 75th percentile, falls between 171.3 and 181.0 cm, a spread of 9.7 cm. The outer lines of the chart, the 3rd and 97th percentiles, sit at 162.5 and 189.4 cm.

Since 17 years, the median has risen by 0.9 cm over 1 year. By 19 years it reaches 176.6 cm.

For girls at 18 years the median is 163.1 cm, 13.0 cm 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 measures 179.0 cm is at about the 65th percentile, meaning that out of 100 boys this age, about 65 measure less. From 2 years this is height measured standing. If a child of 2 or older was measured lying down, CDC subtracts 0.8 cm before comparing.