A standard serving of Foster's lager beer contains 5.1 percent alcohol. However, there are several different types of available Foster's beer on market on ranging in different amounts of alcohol content.
Foster's Bitter is an older beer initially available in Europe, although it has since been made available in America. The taste is well-balanced and bitter. Foster's Bitter is an ale and contains 5.5 percent alcohol content.
Foster's Super Chilled is also available. This variant is essentially the same beer as the standard lager and has 5.1 percent alcohol. The main difference applies to the bottle which keeps the beer cold while its being drunk.