While the acronyms of beer’s vital stats ‒ ABV, IBU, SRM and OG ‒ may seem like alphabet soup to the uninitiated, alcohol by volume, international bittering units, standard reference method and original gravity are all integral to understanding beer. In this article, we’ll define these vital stats and explain how they’re useful.
Have you ever stood in the beer aisle wondering, “What style am I in the mood for? Do I want a 22-ounce bomber, or a 4-pack of 16-ounce cans? Should I try a new brewery’s beer or just grab one of my go-tos?”
With so many options available for craft lovers, the easiest way to choose a brew is by style. However, knowing a beer’s vital stats can help your decision-making process ‒ specifically, a beer’s alcohol by volume (ABV), international bittering units (IBU), standard reference method (SRM) and, sometime (but not always), original gravity (OG).
ABV / Alcohol by Volume in Beer
Almost every beer a consumer will find on the shelf or on draft will have its ABV clearly labeled. Technically, alcohol by volume is defined as a standard measure of how much alcohol is contained in a given volume of an alcoholic beverage. It is defined as the number of milliliters (mL) of pure ethanol present in 100 mL of solution at 20°C (68°F). The number of milliliters of pure ethanol is the mass of the ethanol divided by its density at 20 °C.