What's the average weight for a twelve year old girl?

Ave in Us 90lb: The average weight of males of females of average height @12y is 90lb(41kg) according to the national center for health statistics charts. The range of normal weight varies with height & sex. Males from 60-135lb & females 65-140lb.

What height?: Average weight should be discussed in the context of height, since children experience growth in height at different times, expecially during 12 and up years of age. Although the average weight is 90 lbs, the average range (5th to 95th percentile) is from about 70 lbs to 140 lbs. Here is a calculator: http://goo.Gl/mku6o and here is a growth chart http://goo.Gl/ovrvo.

Variable by height: The weight of an average 12 yo female at an average height of 59.5 in is 93 lb. You can find age and height related figures off a growth chart.Go to www.Cdc.Gov/growthcharts and select a gender and age range. Download the chart and put in the various figures for height and age.The expected weight would be a weight at the same percentage as the height.