One of the first questions a cloth diapering newbie faces with a bit of trepidation is the question, “How many cloth diapers will I need?” Most people agree that a good number of diapers to have is 18 if you want to cloth diaper full time and wash them every other day, but this answer might not suit for everyone. How many diapers you have will really depend on your baby’s age, and on how often you wash diapers.