"normal" beers have around 3-5 % alcohol (for the volume, i.e. in 100ml beer there is 3-5ml alcohol). in brewing beer, the amount of alcohol can be made more or less quite easily. the belgian types of beer are made by adding more sugar. through the fermentation, this will then turn to alcohol. today, there are beers with between 2% and about 16% of alcohol (about the same alcohol content as wine). spirits can have up to 80% alcohol. some beer labels say there is no alcohol in them because it was taken out later. this is not completely true, though. beers "without alcohol" usually do have less than 1% of alcohol.