Whats the average counterbalance for a 12 year antediluvian?

just so you know I'am not 12 i'am 19, I'am studying to be nutritionist (I reflect on thats how you spell it).Whats the average counterbalance for a 12 year antediluvian?
Type in BMI Calculator and type surrounded by the info and it'll tell you what your counterbalance range is
I feel it depends on height. Or BMI or something close to that.
I know it's not 218 lbs. like that British kid. More similar to 80 lbs.
It depends on whether or not you are talking in the order of America or not. If you are add 25-40 lbs. to the answer.
You don't vote how TALL the 12 year old is, so can't tender you an answer.
Also, if you really are 19, how come you are not sure how to spell nutritionist? That sounds like something a 12 year ripened would say.
okay...i am 13 now...and i of late turned 13 on march 1st..
and my wieght be alternating between 85lb-100lb
so yeah:P i dont really know what the average is...but i hope that helped!