To find her ideal weight, you must know her height.
You cannot express weight in centimeters.
hieght: 5.3 - 5.5 weight: 100lbs - 120lbs
about 8.5kg
about 80-100 pounds.
You can not calculate a healthy weight by age and average as everybody is genetically differant. The best way to check the health of the twelve year old is. BMI, (body mass index), which is calculated by either:- Height and weight. OR Weight and waist size.
The average is 45kg, but in the 50's is ok.
About 150 pounds
it is 35 or 36
85 pounds
They should probably weight about 100-115 pounds
about 90 pounds
I am not certain, But i think that is pretty bad! The average weight for a twelve year old would be around 120 lb to 130 lb. I am a twelve year old female and i weigh 140 lb, And that isn't very good either.. ;p