A “standard drink” is a unit that represents a fixed amount of pure alcohol, not a specific glass size or type of beverage. In many countries, this is defined so people can compare how much alcohol they are actually consuming across beer, wine, and spirits.

Core facts about standard drinks

  • In the United States, one standard drink contains about 14 grams (0.6 fluid ounces) of pure alcohol.
  • Typical examples of one U.S. standard drink are:
    • 12 fl oz of regular beer at about 5% alcohol by volume (ABV)
    • 5 fl oz of wine at about 12% ABV
    • 1.5 fl oz of distilled spirits at about 40% ABV (a “shot”).

What a standard drink really means

  • Different drinks and serving sizes can all equal “one standard drink” if they contain the same amount of pure alcohol, even though they look very different in the glass.
  • A larger or stronger drink can count as more than one standard drink (for example, a 12 oz beer at 10% ABV is roughly two U.S. standard drinks).

Common true statements about standard drinks

If you see multiple-choice options, the ones that are generally true about standard drinks tend to look like:

  • “A standard drink is based on the amount of pure alcohol, not the size of the glass.”
  • “In the U.S., a standard drink contains about 14 grams (0.6 fl oz) of pure alcohol.”
  • “A 12 oz regular beer (5% ABV), a 5 oz glass of wine (12% ABV), and a 1.5 oz shot of spirits (40% ABV) each contain about one standard drink.”
  • “Some drinks can contain more than one standard drink depending on their strength and serving size.”

Why this matters for health

  • Health guidelines and “low-risk” drinking advice are usually based on the number of standard drinks per day or per week, not just “glasses” or “bottles.”
  • Understanding standard drinks helps people track how much they are really drinking and compare it to recommended limits.

Quick check for your question

Since your exact answer options are not shown, the statement that is most likely correct in a question asking “which of the following is true about standard drinks?” is something along these lines:

“A standard drink is a measure of pure alcohol (about 14 g or 0.6 fl oz in the U.S.), and different beverages (beer, wine, spirits) can all be one standard drink if they contain this amount of alcohol.”

Information gathered from public forums or data available on the internet and portrayed here.