Conversion Note. By De On June 25, 2008 In Uncategorized A growler of beer is 1/2 gallon, or 64 ounces. A bottle of beer is 12 ounces. One growler equals 5 1/3 bottles of beer. Previous Power-Generating Bra Next 100 Books Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.