Age Girls Weight
Body weight (w) parameters, kg
Very low Low Below the average Average Above average Tall Very tall
newborn 2.0 2.4 2.8 3.2 3.7 4.2 4.8
1 month 2.7 3.2 3.6 4.2 4.8 5.5 6.2
2 months 3.4 3.9 4.5 5.1 5.8 6.6 7.5
3 months 4.0 4.5 5.2 5.8 6.6 7.5 8.5
4 months 4.4 5.0 5.7 6.4 7.3 8.2 9.3
5 months 4.8 5.4 6.1 6.9 7.8 8.8 10.0
6 months 5.1 5.7 6.5 7.3 8.2 9.3 10.6
7 months 5.3 6.0 6.8 7.6 8.6 9.8 11.1
8 months 5.6 6.3 7.0 7.9 9.0 10.2 11.6
9 months 5.8 6.5 7.3 8.2 9.3 10.5 12.0
10 months 5.9 6.7 7.5 8.5 9.6 10.9 12.4
11 months 6.1 6.9 7.7 8.7 9.9 11.2 12.8
12 months 6.3 7.0 7.9 8.9 10.1 11.5 13.1
Age Boys Weight
  Body weight (w) parameters, kg
Very low Low Below the average Average Above average Tall Very tall
newborn 2.1 2.5 2.9 3.3 3.9 4.4 5.0
1 month 2.9 3.4 3.9 4.5 5.1 5.8 6.6
2 months 3.8 4.3 4.9 5.6 6.3 7.1 8.0
3 months 4.4 5.0 5.7 6.4 7.2 8.0 9.0
4 months 4.9 5.6 6.2 7.0 7.8 8.7 9.7
5 months 5.3 6.0 6.7 7.5 8.4 9.3 10.4
6 months 5.7 6.4 7.1 7.9 8.8 9.8 10.9
7 months 5.9 6.7 7.4 8.3 9.2 10.3 11.4
8 months 6.2 6.9 7.7 8.6 9.6 10.7 11.9
9 months 6.4 7.1 8.0 8.9 9.9 11.0 12.3
10 months 6.6 7.4 8.2 9.2 10.2 11.4 12.7
11 months 6.8 7.6 8.4 9.4 10.5 11.7 13.0
12 months 6.9 7.7 8.6 9.6 10.8 12.0 13.3