Explanation of %vol on wine label

%vol is the standard alcohol content. The standard alcohol content refers to the number of milliliters of alcohol per 100 ml of liquor at 20℃. Usually expressed as "%Vol" or "GL". Alcohol refers to the content of ethanol in wine, that is, the amount of ethanol contained in wine. At present, there are three kinds of wine expressions in the world: standard wine, English wine and American wine. The alcohol content in Britain is expressed by "Sikes". The American alcohol content is calculated by the number of milliliters of pure alcohol contained in 200 milliliters of wine at 60 degrees Fahrenheit. American alcohol is based on certificates. The expression of alcohol content adopted in China is standard alcohol content, that is, at 20℃, every 100 ml of liquor contains alcohol 1 ml, and the alcohol content is 1, which can also be expressed as 1.