How many supervising adults will I need per amount of children?

According to several children safety organizations, the ratio of adults to children should be 1 adult per 4 children if they’re aged 2-3. For children ages 4-8, they recommend 1 adult per 6 children, and for ages 9-12, they recommend 1 adult per 8 children. This should give you a rough idea of the average amount of adults you’ll need to supervise your child’s party.