You can't.
The myth is you can double the height of a two year old and that's how tall they will be.
6'2"-6'3"
let me jump in my time machine
Well, he's tall! He'll be about 6'0"-6'7".
You are an adult - and adults make adult decisions. Where is the father of your baby? Tell him he needs to step up and be an adult too. Then, tell your parents what your "adult" solution is.
2 feet 1/2 inch
She'll be over 5'6 , but shorter than 5'11.
Somewhere between 5'4" and 6'1".
She should be 68 inches.
At 18 they are an adult, but if they are getting support from you and you are housing them I should think you have the right to tell them what to do. If they don't like it they can move since they are an adult.
3year old son is 40 inches tall how tall will he be as an adult
5'6 is quite tall for a 13 year old if you are 13-13.5 yrs old. you may end up to be 6'2 - 6'4 when you are an adult depending on your genes and environment.