Child Development Stages - Physical Specifications

Physical Specifications

Age Average length/height
(cm)
Length growth Average weight Weight gain Respiration rate
(per minute)
Normal body temperature Heart rate (pulse)
(per minute)
Visual acuity
(Snellen chart)
1–4 months 50–70 cm (20–28 in) 2.5 cm (0.98 in) per month 4–8 kg (8.8–18 lb) 100–200 g per week 30 to 40 35.7–37.5 °C
4–8 months 70–75 cm (28–30 in) 1.3 cm (0.51 in) per month (doubling birth weight) 500 g per month 25 to 50 body temperature heart rate
8–12 months Approx. 1.5 times birth length by first birthday 9.6 kg (21 lb)
Nearly triple the birth weight by first birthday
500 g per month 20 to 45 body temperature heart rate 20/100
12–24 months 80–90 cm (31–35 in) 5–8 cm (2.0–3.1 in) per year 9–13 kg (20–29 lb) 130–250 g per month 22 to 40 body temperature 80 to 110 20/60
2 years 85–95 cm (33–37 in) 7–13 cm (2.8–5.1 in) per year 12–15 kg (26–33 lb)
about 4 times birth weight
1 kg per year 20 to 35 body temperature heart rate

Read more about this topic:  Child Development Stages

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