In the United States the calories expressed in 100 g of beer is then determined by cal in 100 g of beer = 6.9 × alcohol % by weight + 4(RE – ash), with RE meaning the real extract (Plato) and ash expressed as percentage by weight.
Calories in AlcoholBeer (12 oz.)% ABVCaloriesSam Adams Light4.3120Guinness Draught Stout4.2130Bud Light Platinum6140Busch Ice5.9140