How Many ml in a Pint: UK 568ml vs US 473ml Beer Guide

If you’ve ever ordered a pint in both London and New York, you already know the answer feels like it should be simple—but it isn’t. A UK pint pours 568.26125 ml, while a US pint stops at 473.176 ml, leaving you with nearly a full extra glass across the pond. This guide breaks down exactly what you’re getting when you ask for a pint, why the two systems diverged, and what it means for your next round.

UK Pint: 568 ml · US Liquid Pint: 473 ml · US Dry Pint: 551 ml · Half Pint UK: 284 ml

The table below summarizes key measurement standards from official conversion sources and reference dictionaries.

How many ml is a pint in Ireland?

Ireland follows the same imperial standard as the United Kingdom. An Irish pint measures exactly 568.26125 ml—the same as a UK pint, since Ireland adopted the British Imperial system before independence and has maintained it for beer and cider serving. This isn’t merely a cultural quirk; it’s legally codified. UK and Irish law both standardize the pint as 568 ml for draught beer and cider in pubs.

Ireland pint vs UK imperial

The two systems are functionally identical on the island of Ireland. Both define a pint as 1/8 of an imperial gallon (4.54609 L), which works out to 20 imperial fluid ounces of 28.413 ml each. If you order a pint of Guinness in Dublin or London, you receive the same volume—a deliberate standardization that dates to the Imperial Weights and Measures Act of 1824.

Pint of Guinness in Ireland

A pint of Guinness at the source—the St. James’s Gate Brewery in Dublin—follows the standard imperial measure. The 568 ml pour is treated with near-religious reverence in Irish pub culture, and many establishments resist any metrication pressure precisely because of this tradition. The volume difference between an Irish pour and an American one becomes immediately obvious when comparing bar tabs.

Is 500 mL a pint of beer?

No—500 ml falls short of an imperial pint and exceeds a US liquid pint. In most of continental Europe, a “pint” served in pubs is actually a rounded metric approximation of 500 ml (half a litre), not the traditional 568 ml UK measure. This creates confusion for travelers who assume “pint” means the same thing across borders.

500 ml in Europe vs traditional pints

European bars often serve 500 ml as a standard beer serving, which sits awkwardly between the two traditional pint measures. It’s 68 ml less than a UK pint but 27 ml more than a US pint. When European tourists order “a pint” in London and receive 568 ml, they’re often surprised by the volume. Conversely, Americans in Berlin expecting a 473 ml pour may be startled by a 500 ml glass.

UK beer pint size

UK pubs legally serve draught beer in only two sizes: the pint (568 ml) and the half-pint (284 ml). This standardization is protected under the Weights and Measures Act, meaning a UK pint is not 500 ml and never has been. Some European beer brands that have expanded into UK markets market their bottles as “pints” of 500 ml on the label—but in a UK pub, the draught pour remains a strict 568 ml.

Is 1 pint the same as 500ml?

One pint is not the same as 500 ml. The UK imperial pint contains 568.26125 ml, making it roughly 14% larger than 500 ml. The US liquid pint (473.176 ml) falls 27 ml short of 500 ml. The gap between UK and US pints—about 95 ml—demonstrates why specifying “UK” or “US” matters for international conversions.

UK vs metric approximations

The confusion stems from the metrication of everyday language. In countries that adopted the metric system, the word “pint” sometimes survives colloquially to mean “approximately 500 ml,” even though the original imperial measure no longer applies. Australia, South Africa, and New Zealand all abandoned the imperial pint during their 1960s–1970s metrication drives, according to Wikipedia.

Half pint UK: 284 ml

The UK half-pint measures exactly 284.131 ml—half of the imperial pint. In practice, UK pubs serve this as a smaller measure for certain drinks or for those wanting a lighter pour. It’s not 250 ml (the nearest round metric figure), and it’s certainly not 500 ml. The half-pint maintains its imperial definition even as the surrounding metric environment makes the terminology seem outdated.

How many ml in a pint of beer?

The milliliter content of a pint of beer depends entirely on where you are. In the United Kingdom and Ireland, a pint of lager, ale, or cider measures 568.26125 ml. In the United States, a liquid pint of beer measures 473.176 ml. For dry goods, the US dry pint (551 ml) applies to items like berries or cherries—but not beer.

Pint of lager

A pint of lager in a UK pub follows the imperial standard: 568 ml of beer, typically served in a slightly taller glass than the traditional nonic tumbler used for ales. The serving is generous by international standards, which is why UK beer prices often appear steep to American visitors—though you’re also receiving significantly more liquid per pound.

Pint bottle of Bulmers

Bulmers (known as Magners outside Ireland) sells cider in 500 ml bottles, not pint bottles. This creates an interesting discrepancy: the bottle says 500 ml, but if you were to pour it into a UK pub glass, it would fall about 68 ml short of a full imperial pint. Irish pubs that serve Bulmers by the bottle typically offer them as 500 ml measures rather than attempting to create a full 568 ml pint from the bottle.

How many ml in a pint (UK)?

A UK imperial pint equals exactly 568.26125 ml. This derives from the imperial gallon (4.54609 L), which is divided into eight equal parts. Each of those parts—the pint—contains 20 imperial fluid ounces of 28.413 ml each. The arithmetic is precise: 20 × 28.413 = 568.26 ml.

UK vs US pint comparison

The difference between UK and US pints stems from different gallon definitions. The British imperial gallon traces to a 1696 definition of a gallon containing 10 pounds of distilled water—yielding 4.54609 L per gallon. The US gallon derives from the older Queen Anne wine gallon of 231 cubic inches, equaling just 3.785 L. Divide each gallon by eight, and the pint disparity emerges: 568.26125 ml vs 473.176 ml.

According to Unit Converters, 1 UK pint equals 1.2009499255 US pints—the precise conversion factor that reveals just how much larger the imperial measure is. The UK pint is approximately 20% larger than its American counterpart.

Historical context

The imperial pint’s origins trace to the early 19th century, formalized under the Imperial Weights and Measures Act of 1824. The Act abolished competing regional gallon definitions and standardized measurements across Britain and its expanding empire. Beer and cider were among the primary commodities driving this standardization, as evidenced by the fact that pint-serving remains legally mandated in UK pubs more than 200 years later.

Pint size comparison

Three distinct pint measurements dominate global usage, with a fourth informal measure appearing in some markets.

Clarity on pint measurements

“The Imperial pint contains 20 British fluid oz equal to 28.413 ml each. The American pint, by contrast, contains 16 US fluid oz equal to 29.574 ml each.”

— The Oxford Companion to Beer (Reference Dictionary)

“An imperial (UK) pint is 568.26 ml whilst a US pint is only 473.18 ml. The UK pint is approximately 20% larger.”

— Pro Calculator UK (Conversion Tool)

For UK beer enthusiasts and international travelers alike, the practical implication is straightforward: when ordering a pint abroad, always verify the volume. A UK imperial pint delivers 568.26125 ml of tradition and generous pours—significantly more than the American 473.176 ml and substantially more than the rounded 500 ml common in Europe. The difference amounts to nearly a full extra glass per pour, which adds up over an evening of two or three rounds.

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While UK pints measure 568 ml against the US 473 ml standard, detailed US-UK ml conversions breaks down precise figures for beer servings and beyond.

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