Average weight for age (WHO 2007)

Age	Boys	Girls
Birth	3.3 kg	3.2 kg
1 Month	4.5 kg	4.2 kg
2 Months	5.6 kg	5.1 kg
3 Months	6.4 kg	5.8 kg
4 Months	7.0 kg	6.4 kg
5 Months	7.5 kg	6.9 kg
6 Months	7.9 kg	7.3 kg
7 Months	8.3 kg	7.6 kg
8 Months	8.6 kg	7.9 kg
9 Months	8.9 kg	8.2 kg
10 Months	9.2 kg	8.5 kg
11 Months	9.4 kg	8.7 kg
12 Months	9.6 kg	8.9 kg
13 Months	9.9 kg	9.2 kg
14 Months	10.1 kg	9.4 kg
15 Months	10.3 kg	9.6 kg
16 Months	10.5 kg	9.8 kg
17 Months	10.7 kg	10.0 kg
18 Months	10.9 kg	10.2 kg
19 Months	11.1 kg	10.4 kg
20 Months	11.3 kg	10.6 kg
21 Months	11.5 kg	10.9 kg
22 Months	11.8 kg	11.1 kg
23 Months	12.0 kg	11.3 kg
2 Years	12.2 kg	11.5 kg
3 Years	14.3 kg	13.9 kg
4 years	16.3 kg	16.1 kg
5 years	18.3 kg	18.2 kg
6 years	20.5 kg	20.2 kg
7 years	22.9 kg	22.4 kg
8 years	25.4 kg	25.0 kg
9 years	28.1 kg	28.2 kg
10 years	31.2 kg	31.9 kg