What is the average weight of a 1-year-old?

AnswerAbout 20 pounds give or take. I have seen some at 30 and some at 15. It all depends on the baby. Premature ones will be lower weight. By 1 year they should be 3X the size they were at birth. My last baby was born at 10 1/2 pounds so X 3 that would put him at about 30 pounds at 1 year.