What is a standard drink? The complete guide

If you want an honest picture of how much you drink, you need one ruler that works for beer, wine, and spirits alike. That ruler is the standard drink — and once you can count in it, a pint, a glass, and a shot finally sit on the same scale.

What counts as a standard drink

A standard drink isn’t a glass size — it’s a fixed amount of pure alcohol. In the United States, one standard drink is 0.6 fluid ounces (about 14 grams) of pure alcohol, the measure used by the National Institute on Alcohol Abuse and Alcoholism. The amount of liquid changes with the drink’s strength, but the amount of alcohol stays the same.

The simple formula

You never have to do this at the bar — apps like PitchCount do it for you — but it’s worth seeing once:

standard drinks = volume (oz) × ABV% ÷ 0.6

A 12 oz beer at 5% ABV is 12 × 5 ÷ 100 ÷ 0.6 = 1.0. That’s the reference point the whole system is built on.

Standard drink sizes by type

At typical strengths, these each come out to about one standard drink:

Drink	Typical size	Typical ABV	Standard drinks
Regular beer	12 oz	5%	1.0
Light lager	12 oz	4.2%	~0.8
Malt liquor	8–9 oz	7%	~1.0
Table wine	5 oz	12%	~1.0
Spirits (a shot)	1.5 oz	40%	~1.0

The catch is the word typical. A hazy IPA, a generous wine pour, or a double all push well past one — which is exactly where counting by “number of drinks” goes wrong.

Why standard drinks matter

Counting by glasses hides the truth. “Three beers” sounds the same whether they’re light lagers or 8% IPAs — but one of those nights is roughly 2.4 standard drinks and the other is closer to 5. Standard drinks fix that in two ways:

• They make drinks comparable. A strong beer and a glass of wine can finally be added together honestly.
• They make your week trackable. A weekly total only means something if every drink is measured the same way.

If you want the number for a specific drink, the standard-drink calculator does it instantly, and the guide on how many standard drinks are in a 7% IPA shows why strong beer adds up so fast.

Standard drinks around the world

“Standard drink” doesn’t mean the same thing everywhere. The US uses 14 g of pure alcohol; the UK measures units at 8 g each; Australia uses 10 g. So a drink that’s “2 units” in London is about 1.1 US standard drinks. PitchCount uses the US standard throughout, so everything stays on one consistent scale.

How to count strong and craft drinks

The two things that quietly inflate your count are strength and pour size. A 16 oz pint of a 7% IPA is about 1.9 standard drinks — nearly two — and a 1.75 L handle of spirits is around 39. When in doubt, check the ABV on the label and the actual pour, then let the formula (or the app) do the rest. The calories add up on the same curve, so counting standard drinks also gives you a running sense of the calories.

The point isn’t precision for its own sake — it’s an honest trend. Logging by standard drinks instead of by glasses is the single fastest way to make your tracking tell the truth.

Frequently asked questions

How many standard drinks are in a beer, a glass of wine, and a shot?

Roughly one each, at typical strengths — a 12 oz beer at 5% ABV, a 5 oz glass of wine at 12%, and a 1.5 oz shot of 40% spirits are all about one US standard drink. Stronger or larger pours count for more.

How big is a standard drink in grams and ounces?

A US standard drink contains 0.6 fluid ounces — about 14 grams — of pure alcohol. The amount of liquid changes with the drink's strength, but the alcohol is fixed.

Is a standard drink the same in every country?

No. The US uses 14 g of pure alcohol per standard drink, the UK uses 8 g per "unit," and Australia uses 10 g. PitchCount uses the US standard throughout.

How do I count a strong craft beer?

Use volume × ABV% ÷ 0.6. A 16 oz pour of a 7% IPA is about 1.9 standard drinks — nearly two — even though it looks like "one beer."

This is general information, not medical advice. If you're concerned about your drinking or think you may be dependent, please talk to a healthcare professional.