Newborns typically use about 8 to 12 diapers per day. On average, many sources suggest around 10 diapers daily for newborns, as they urinate frequently (every 1 to 3 hours) and have frequent bowel movements, especially in the first few weeks. This means parents often change diapers every 2 to 3 hours to prevent irritation and diaper rash. Over a month, this can add up to around 280-325 diapers. The number of diapers decreases as the baby grows, with older babies using fewer diapers daily. But for newborns, preparing for about 10 diapers a day is a good rule of thumb.