Throwing a party and need to know how much beer to buy? You'll get an estimate of how many cans of beer to buy using this calculator. The general rule of thumb for serving alcoholic beverages is to expect your guests to consume 2 drinks the first hour of the party and 1 drink every additional hour.
This calculator assumes that beer will be the primary alcohol served. If you are serving other drinks/cocktails, you would need 1/3 of that amount. Of course, if it's a football or superbowl party, you'll probably want to double the amount.