12 years old (1998 1 1 month) What is the normal weight and height of girls? My height 158cm, weight 40.5kg, am I fat? Is it normal? Standard?

/kloc-children aged 0/2 can be calculated as follows:

Female student: standard weight = (height-105)×0.92.

Male: standard weight = (height-100)×0.90.

After calculation, your height and weight belong to the normal proportion range, so you don't need to lose weight!