Height and weight for children can be easily calculated according to their age and sex of the child. The weight is calculated in kilograms and height is calculated in centimeters. The height and weight at each age can range from a lower limit to an upper limit of normal. The weight can be at the lower limit or upper limit of normal depending upon the body build and parents body frame.

A few interesting facts : - By the age of 9, an average boy would have attained 75% of his adult height.
- By the age of 18, he would attain double his height at an early age.
- By the age of 8, an average girl would have attained 75% of her adult height.
- By the age of 18, she would attain double her height when two years old.