Height Chart for 15-Year-6-Month-Old Boys

At 15 years 6 months, the median in the CDC table for boys is 172.2 cm (5 ft 7.8 in), which is 97.4% of the median at age 20 (176.8 cm). The 3rd percentile is 157.0 cm and the 97th is 185.8 cm.

CDC standing stature percentiles for boys aged 15 years 6 months. Source: CDC 2000 Growth Charts: stature-for-age, 2-20 years, file statage.csv, row Sex=1, Agemos=186.5 (completed month 186 band) (dataset page).
PercentileMetricFeet-inches
3rd157.0 cm5 ft 1.8 in
5th159.0 cm5 ft 2.6 in
10th162.0 cm5 ft 3.8 in
25th166.9 cm5 ft 5.7 in
50th172.2 cm5 ft 7.8 in
75th177.2 cm5 ft 9.8 in
90th181.6 cm5 ft 11.5 in
95th184.2 cm6 ft 0.5 in
97th185.8 cm6 ft 1.2 in

Check a height against this row

or

Accepts 137.4 to 199.9 cm.

3rd5th10th25th50th75th90th95th97th 157.0159.0162.0166.9172.2177.2181.6184.2185.8

How much the median still changes after 15 years 6 months

Six months on, the median is 173.6 cm, a change of 1.4 cm; a year on it is 174.6 cm, a change of 2.4 cm. From this age to 20 the table adds 4.6 cm to the median in total.

The 12-month gain drops below 1 cm for good from 16 years 11 months. It is still 2.4 cm here, against a peak after age 6 of 7.8 cm from 12 years 9 months.

Across the next 12 months the lowest line shown, the 3rd percentile, moves up 3.3 cm, and the highest, the 97th, moves up 2.2 cm. The lower line still gains more than the upper one, so the 3rd-to-97th gap shrinks from 28.8 cm to 27.7 cm.

Nearby rows of the CDC stature-for-age table for boys, in centimeters. The last column is the change in the median since the row above.
Age3rd50th97thChange
13 years 6 months145.1160.3175.2
14 years 6 months151.8167.5181.8+7.2
15 years154.6170.1184.1+2.6
15 years 6 months157.0172.2185.8+2.1
16 years158.8173.6187.1+1.4
16 years 6 months160.3174.6188.0+1.0
17 years 6 months162.0175.8189.1+1.2
20 years163.3176.8190.2+1.0

Where the 3rd and 97th percentiles sit

The middle half of the reference, from the 25th to the 75th percentile, spans 10.3 cm; the 3rd-to-97th range spans 28.8 cm. For boys, that range is widest at 13 years 9 months (30.3 cm).

Measured against younger boys, a boy aged 15 years 6 months on the 3rd percentile (157.0 cm) roughly matches the median boy of 13 years 1 month (157.1 cm). The 97th-percentile height (185.8 cm) is 9.0 cm above the median at 20 (176.8 cm).

Boys and girls at 15 years 6 months

Girls of the same age have a median of 162.3 cm, 9.9 cm below the boys' median. At 20 the gap between the two medians is 13.5 cm. The girls' median is higher than the boys' only from 10 years 9 months to 13 years 2 months.

When to talk to a doctor

If growth has slowed unexpectedly, a teen is crossing downward through percentile lines, or puberty seems unusually early or late, speak to a pediatrician or family doctor. A percentile on its own is not a diagnosis or a measure of health.

Reference values only, not medical advice. How these tables are built.