Body weight estimation in children

For children aged 1-10years weight in kg can also be estimated as:

(age in years + 4)  x 2

or alternatively, use the table below

Age

Approximate mean weight in Kg

3 months 6
6 months 8
9 months 9
1 year 10
2 years 12
4 years 16
6 years 20
8 years 25
10 years 30
12 years 40