How many diapers a baby goes through in a day can depend on their weight, age, and diaper size ... or 4 boxes (based on 142 per box) size 3 16 to 28 lb 5 to 24 months 6 to 7 per day 27 packs ...

If your baby weighs under 6 pounds at birth, you may want to put him in a preemie-sized diaper ... grow quickly at that age, says Dr. Resnick, and your baby will be a size 1 before you know ...