A standard drink in the United States contains about 14 grams, or about 0.6 fluid ounces, of pure alcohol. This amount is typically found in:

• 12 ounces of regular beer (5% alcohol by volume)
• 5 ounces of wine (12% alcohol by volume)
• 1.5 ounces of distilled spirits or liquor (40% alcohol by volume)

These quantities represent one standard drink each, despite the different beverage types and serving sizes.