By the WHO growth reference, boys who have just turned 3 have a median height of 96.1 cm (3′2″). Most children (94%) are between 89.1 cm (2′11″) and 103.1 cm (3′5″).
96.1 cm (3′2″)
median height (P50)
89.1–103.1 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 3 years | 89.1 | 92.2 | 96.1 | 99.9 | 103.1 |
| 3 years 3 months | 90.8 | 94 | 98 | 102 | 105.2 |
| 3 years 6 months | 92.4 | 95.7 | 99.8 | 104 | 107.3 |
| 3 years 9 months | 93.9 | 97.4 | 101.6 | 105.9 | 109.3 |
P50 is the median: half of children the same age are shorter and half taller. P3 to P97 is the range WHO treats as normal.
| Height | Children shorter |
|---|---|
| 85 cm (2′9″) | 0.1% |
| 90 cm (2′11″) | 5% |
| 95 cm (3′1″) | 38% |
| 100 cm (3′3″) | 85% |
| 105 cm (3′5″) | 99.2% |
Values come straight from World Health Organization tables: the WHO Child Growth Standards (2006) for ages 0–5 and the WHO Growth Reference (2007) for ages 5–19. National references (CDC in the US, for example) can differ by a few centimetres. This is not a diagnostic tool: growth over time matters more than a single measurement, and questions about your child's growth belong with their doctor.