There are 12 bottles in a standard case of wine. Each of those bottles normally contains 750 milliliters of wine, giving the case a total of 9 liters. If a case contains anything other than 12 bottles, the wine manufacturer or seller usually notes the change for consumers.
A 750 milliliter bottle of wine generally contains five 5-ounce glasses, meaning that a case of wine provides roughly 60 glasses of wine. When hosting a party where wine is being served, it is best to plan on each person consuming one glass of wine every hour, meaning that each guest drinks a full bottle over the course of a five-hour party.