Newborn babies typically use 10 to 12 newborn diapers per day. So using the upper limit, you will need 12 × 30 = 360 diapers for the first month. If you intend to buy a pack that contains 192 diapers, you will need two boxes of these diapers in the first month. If a smaller box is available, it may be best to opt for one large and one small. Read more