Alcohol is not a carb. It has its own caloric value around 7 (with carbs and proteins at 4 and fats at 9). The sugars used to make distilled spirits, like dextrose in beer, are converted by yeast from sugars to alcohol. Thus most distilled spirits (ie gin, vodka etc) have 0 carbs, but still have calories from alcohol. Wine does have some carbs however, as does most beer.