How much weight will you gain from drinking beer?

It depends on how much you drink (and how much you exercise). Beer is empty calories, most have 100-200 calories per serving. See the related question for more details on specific beers. Plus you have to take in the munchy effect. More input and advice: * A 6-pack could easly make you gain half a pound. * Most of the people I met in college gained around 20lbs a year from all the parties.