Please note that these ranges represent general guidelines for adult females and may vary based on factors such as body composition, muscle mass, bone structure, and overall health. It is essential to focus on overall health and well-being rather than solely on weight., The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone’s weight at this age, including their, As children approach adolescence at the age of 12, they experience growth spurts and various physical changes. The average weight for a 12-year-old typically falls around 41 kg for boys and 42 kg for girls based on CDC growth charts 1., This chart shows weight percentiles, according to the CDC, for girls 12 years of age. To determine an individual's percentile, find the range that includes their weight., The average weight for a 12 year old female typically ranges between 80 to 110 pounds, depending on height, genetics, and development stage., For 12-year-old girls: Weights often range from approximately 65 to 135 pounds (about 29.5 to 61 kg). For 12-year-old boys: Weights often range from approximately 67 to 130 pounds (about 30.4 to 59 kg). It's crucial to remember that these are very broad ranges and individual variations are expected..