Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alcohol equivalence is a system of standard drink sizes of various alcoholic beverages. The amount of alcohol (i.e., ethanol) that is contained in a standard drink varies widely by country.In New Zealand one standard drink, as defined by the Alcohol Advisory Council, contains 10 grams of ethyl alcohol which is approximately 12.7 mL. endnote_Assuming_a_density_of_0.789_g_.2F_mL.^ This is approximately "a 330ml can of beer or a 100ml glass of table wine or a 30ml glass of straight spirits".In the United States, a standard drink is defined as 0.6 fluid ounce of pure alcohol.