Every child’s development path is unique, but generally speaking, babies learn to roll in a series of stages: Rolling from back to side (3 to 5 months), Rolling from belly to back (3 to 5.5 months, with the average between 4 and 5 months), Rolling from back to belly (5 to 7 months), If your baby happens to learn back-to-belly rolling first, that’s okay. Sometimes babies who really enjoy tummy time learn to roll from back to belly before rolling belly to back.