Pediatric Growth & Development Guide
Average measurements and developmental milestones
Average Height for Boys
Birth
19.5"
49.5 cm
3 months
23.5"
60 cm
6 months
26"
66 cm
9 months
27.5"
70 cm
1 year
29.5"
75 cm
18 months
32"
81 cm
2 years
34.5"
87.5 cm
3 years
37.5"
95 cm
4 years
40"
101.5 cm
5 years
42.5"
108 cm
6 years
45"
114 cm
7 years
47.5"
121 cm
8 years
50"
127 cm
9 years
52"
132 cm
10 years
54.5"
138 cm
11 years
56.5"
143.5 cm
12 years
58.5"
149 cm
13 years
61.5"
156 cm
14 years
64.5"
164 cm
15 years
67"
170 cm
16 years
68.5"
173.5 cm
17 years
69"
175 cm
18 years
69.5"
176.5 cm
Important: These are average measurements and developmental milestones. Every child grows and develops at their own pace. Some children may reach milestones earlier or later than average. If you have concerns about your child's growth or development, always consult your pediatrician.