The alcohol content of a 12-ounce serving of Miller Lite beer is 4.2 percent by volume. There are 96 calories in Miller Lite. Other Miller brand beers have alcohol contents in the range between 4.2 and 5.5 percent.
Miller High Life has the highest alcohol content by volume at 5.5 percent and also contains 156 calories. A brand of beer that has the highest alcohol by volume content is Samuel Adams Triple Buck at 17.5 percent.
There are two methods to measure beer alcohol content, which are alcohol by percent of volume and alcohol by percent of weight. In Europe and the United Kingdom, the content of alcohol in beer is given in percentage by volume. However, in the United States, large breweries can give this in alcohol by percent of weight. Typically, a beer that is listed as 4 percent by volume is equivalent to 3.2 percent by weight.