The average age to hit puberty can vary depending on factors such as gender, ethnicity, and individual differences. However, generally speaking, girls usually start puberty earlier than boys.
For girls, the average age for the onset of puberty is around 10 to 11 years old, but it can start as early as 8 years old or as late as 13 years old. Signs of puberty in girls include breast development, the growth of pubic hair, and the start of menstruation (menarche).
For boys, puberty typically begins between the ages of 11 and 12, but it can start as early as 9 years old or as late as 14 years old. Boys may experience growth of facial and body hair, a deeper voice, and an increase in muscle mass during puberty.
It's important to note that these are just averages, and there is a wide range of normal variation. If there are concerns about delayed or early puberty, it's best to consult a healthcare professional for guidance and evaluation.