How Many Ounces in a Pint? US vs UK Pint Conversion

You’re at a bar, thirsty, and you order a pint. But what you get depends entirely on which side of the Atlantic you’re standing. A US liquid pint holds 16 fluid ounces, while a UK imperial pint packs 20. That 4-ounce gap might seem small, but it’s a difference that has tripped up cooks, brewers, and berry buyers for nearly two centuries. This guide untangles the three kinds of pint—US liquid, US dry, and UK imperial—so you know exactly how many ounces you’re dealing with.

US liquid pint to oz: 16 oz (473 ml) ·
UK imperial pint to oz: 20 oz (568 ml) ·
US dry pint to oz: 18.6 oz (551 ml) ·
US half pint to oz: 8 oz ·
UK half pint to oz: 10 oz

Six pint variations, one key takeaway: the same word means different volumes depending on the system and the substance. The table below lines them up.

Is a pint 16 or 20 oz?

The answer is both—it depends on which pint you’re talking about. Let’s break it down.

US Liquid Pint: 16 oz

• The US liquid pint is one-eighth of a US gallon of exactly 231 cubic inches, yielding 16 US fluid ounces (The Oxford Companion to Beer).
• That equals 473.176473 milliliters, per the US customary system (Wikipedia).

UK Imperial Pint: 20 oz

• The UK imperial pint is one-eighth of the imperial gallon (277.419 cubic inches) and equals 20 imperial fluid ounces (The Oxford Companion to Beer).
• That’s 568.261 milliliters (Britannica).

Why the difference?

The split dates to 1824, when the UK redefined its gallon under the Imperial Weights and Measures Act, creating a larger pint. The US kept the older Queen Anne wine gallon (231 cubic inches) as its standard, so the US liquid pint remained 16 oz (The Oxford Companion to Beer).

The implication: the 16 oz vs 20 oz question is not a matter of right or wrong—it’s a matter of jurisdiction. The US system uses two kinds of pint (liquid and dry), while the British system uses a single pint for both dry and liquid measure (Britannica).

Is 1 pint equal to 8 ounces?

Only if you’re talking about a half-pint. Here’s how that works.

Only a half-pint equals 8 oz in the US

• A US half-pint is exactly 8 fluid ounces, half of the 16 oz US liquid pint.
• Commonly used for small servings of milk, cream, or beer flights.

UK half-pint equals 10 oz

• In the UK, a half-pint is 10 imperial fluid ounces, half of the 20 oz imperial pint.

Common half-pint uses

Half-pints are typical for children’s milk portions in the UK and for small beer samples in both countries. A full pint is never 8 oz.

What this means: if a recipe calls for “half a pint,” you need to know which country’s pint you’re halving. The difference is 2 oz—enough to throw off a delicate sauce.

How many oz in a pint of beer?

Beer drinkers, this one’s for you. The pint glass you’re handed depends on where you order.

US pint of beer: 16 oz

• A standard US pint glass holds 16 fluid ounces. However, some bars serve “pints” in 14 oz glasses, a practice that is not legally enforced (Reddit discussion).

UK pint of beer: 20 oz

• A UK beer pint glass holds 20 imperial fluid ounces. The UK government strictly regulates these measures under the Weights and Measures Act.

What about Guinness?

Guinness is served in imperial pints (20 oz) in Ireland and the UK. In the US, it’s typically poured into a 16 oz pint glass, so the serving size is smaller.

The trade-off: US bars benefit from cost savings on smaller pours, but consumers lose out. In the UK, the pint is a protected measure, ensuring you get what you pay for.

How many oz in a pint of blueberries?

Blueberries and other fruits are often sold by the “dry pint,” which is a volume measure, not a weight measure. This causes confusion.

Dry pint vs liquid pint for berries

• A US dry pint is defined as 33.6 cubic inches (0.551 liter) by NIST (NIST HB 44).
• That’s about 18.6 fluid ounces by volume, but the weight of the berries varies.

1 dry pint equals about 18.6 oz by volume

By volume, a dry pint is 18.6 US fluid ounces. But when you buy blueberries, the weight is typically around 12 ounces per dry pint, because berries don’t pack tightly.

Why volume and weight differ

The USDA uses the dry pint for agricultural goods like blueberries, strawberries, and grains. A dry pint container holds the same volume as a dry pint, but the actual weight depends on the product’s density. For example, a pint of blueberries weighs less than a pint of flour.

Why this matters: if you’re baking and a recipe calls for “a pint of blueberries,” using a liquid pint measure (16 oz volume) would give you less than the intended dry pint. Always check whether the recipe assumes dry or liquid measure.

How many ounces in a pint UK?

For anyone cooking or drinking in the UK, this is the essential conversion.

UK imperial pint = 20 fluid ounces

• The UK pint is legally defined as 20 imperial fluid ounces, equivalent to 568.261 milliliters (Britannica).
• An imperial fluid ounce is smaller than a US fluid ounce (28.4 ml vs 29.6 ml), so the actual volume difference is even greater than a simple 4 oz count suggests.

Why the UK kept the larger pint

When the UK began metricating in 1965, the pint was retained for draft beer, cider, and milk. A 1995 EU directive allowed the UK to continue selling beer and milk by the pint (The Oxford Companion to Beer).

Metric equivalent: 568 ml

For metric kitchen scales, remember: 1 UK pint = 568 ml. A US pint is 473 ml. That 95 ml difference (about 3.2 oz) is critical for precise recipes.

The pattern: the UK’s commitment to the imperial pint is a cultural and legal choice, not a relic. It’s enshrined in the 1985 Weights and Measures Act and remains the standard for pub and dairy trade.

Timeline: How the pint split happened

• 1707: British ale gallon defined as 282 cubic inches, separate from the wine gallon.
• 1824: UK Weights and Measures Act redefines imperial gallon as 277.42 cubic inches, creating the 20 oz imperial pint (The Oxford Companion to Beer).
• 1893: US adopts the 1707 Queen Anne wine gallon (231 cubic inches) as standard, so US liquid pint remains 16 oz (The Oxford Companion to Beer).
• 1965: UK begins metrication but retains pint for draft beer and milk.
• 1995: EU directive allows UK to continue selling beer and milk by the pint.

What’s clear and what’s not

Confirmed facts

• US liquid pint = 16 oz (473 ml) (Britannica)
• UK imperial pint = 20 oz (568 ml) (Britannica)
• US dry pint = 18.6 oz (551 ml) (NIST)
• US half-pint = 8 oz
• UK half-pint = 10 oz

What’s unclear

• Some US bars serve 14 oz glasses as “pints” — not legally enforced.
• Origin of the ale vs wine gallon discrepancy before 1824 is debated among historians.

Quotes from the experts

“The US liquid pint is equal to 16 US fluid ounces, while the UK imperial pint is 20 imperial fluid ounces.”

Britannica

“The imperial pint is about 20 percent larger than the US liquid pint.”

The Oxford Companion to Beer

“NIST distinguishes between liquid pint and dry pint when necessary for trade.”

NIST Handbook 44

For US shoppers and UK travelers alike, the choice is clear: know your system before you pour or measure. A US pint of water is 16 oz; a UK pint of milk is 20 oz. For blueberries, the dry pint (18.6 oz by volume) is the standard. Always check the label—or you’ll end up with less than you bargained for.

Frequently asked questions

Related reading

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• Turkey Pot Pie Recipe: Flaky, Creamy & Foolproof — A recipe where pint and ounce measurements matter.