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

If you’ve ever poured a pint in London and then another in New York, you’ve felt the difference before you measured it. The same word can mean 16 fluid ounces or 20, depending on which side of the Atlantic you’re standing.

US liquid pint: 16 fl oz (473 ml) ·
UK imperial pint: 20 fl oz (568 ml) ·
US dry pint: 18.62 fl oz (551 ml) ·
Half pint (US): 8 fl oz

Use this table for a quick reference on pint conversions.

How many ounces are in a pint?

US liquid pint

• 1 US liquid pint = 16 US fluid ounces (NIST (US measurement authority))
• That’s about 473 ml (The Oxford Companion to Beer (brewing reference))
• Used for most liquids in the United States — milk, water, juice, and beer.

UK imperial pint

• 1 UK imperial pint = 20 imperial fluid ounces (The Oxford Companion to Beer (brewing reference))
• Equal to about 568 ml (The Oxford Companion to Beer (brewing reference))
• Standard for beer and milk in the UK and Commonwealth countries.

Key differences at a glance

• A UK pint is roughly 20% larger than a US pint (Wikipedia (cooking weights reference))
• A US fluid ounce is larger than an imperial fluid ounce (29.574 ml vs 28.413 ml) (The Oxford Companion to Beer (brewing reference))
• Two different gallon definitions drive the entire difference.

The implication: if you’re following a recipe from across the Atlantic, assume the pint is different until you check which system it uses.

Why is a US pint different to a UK pint?

Historical origins

• The US pint is based on the Queen Anne wine gallon of 1707, which measured 231 cubic inches (ANSI Blog (standards analysis))
• The UK adopted the Imperial gallon in 1824, measuring 277.42 cubic inches (ANSI Blog (standards analysis))
• Because the US had already gained independence, it kept the older wine gallon standard.

The British Imperial system vs US customary units

• Imperial system uses a larger gallon; US customary kept the smaller wine gallon (ANSI Blog (standards analysis))
• Both systems define a pint as ⅛ of a gallon — so the pint difference is a direct result of the gallon difference.
• The imperial fluid ounce is also smaller, which partly offsets the larger pint (but not completely).

What this means: the 20% gap between US and UK pints is a 200-year-old measurement divergence that still affects every pint poured — or baked — today.

How many ounces are in a dry pint?

Dry pint vs liquid pint volume

• A US dry pint equals 33.6 cubic inches — about 18.62 US fluid ounces by volume (NIST (US measurement authority))
• It is a volume measure, not a weight measure (NIST (US measurement authority))
• A dry pint is not interchangeable with a liquid pint — the two are defined in different parts of the US customary system (Youth Ningbo (conversion guide))

Examples: blueberries, cherries

• Dry pints are common for berries and produce in US markets.
• One dry pint of blueberries fills a fixed-volume container, but the weight varies by berry size and moisture content (YeeGoLife (lifestyle guide))
• Typical weight: a dry pint of blueberries may range from about 10 to 12 ounces — not the fixed 16 ounces many assume.

The catch: a dry pint’s volume is fixed at about 18.6 fl oz, but its weight is not — so a pint of one berry may weigh differently than another.

Is 8 oz a half pint?

Half pint in US and UK

• In the US, half a pint = 8 US fluid ounces (NIST (US measurement authority))
• In the UK, half a pint = 10 imperial fluid ounces (The Oxford Companion to Beer (brewing reference))

Common misunderstandings: 32 oz and 1 liter

• 32 fl oz = 2 US pints (1 quart), not 1 pint (NIST (US measurement authority))
• 1 liter ≈ 33.8 fl oz (about 2.11 US pints) (Metric Conversions (conversion reference))
• So 1 liter is more than a quart but less than 3 US pints — a common source of confusion in recipes.

Why this matters: ordering a quart when you meant a pint can double your pour, and mistaking a liter for a quart throws off baking ratios.

How many oz in a pint of beer?

Beer pint in the US

• In the US, a pint of beer is typically 16 fl oz, though some bars serve glasses marked as a “pint” that hold 14 or 15 oz (YeeGoLife (lifestyle guide))
• There is no federal law mandating exact pint size for beer in the US.

Beer pint in the UK

• In the UK, a pint of beer must be 20 imperial ounces (568 ml) by law under the Weights and Measures Act (The Oxford Companion to Beer (brewing reference))
• Pint glasses are required to carry a “CE” or crown stamp indicating accuracy.

Other beverages: water, milk, oil

• Water, milk, and cooking oil all follow the same liquid pint definitions — 16 US fl oz or 20 UK fl oz (VegNews (baking reference))
• Density of the liquid does not change the fluid ounce measure; a pint is a volume, not a weight.

The trade-off: the UK’s legal pint protects consumers, while US pint glasses can vary — so always check the glass before you drink.

Three pint systems, one clear contrast: US liquid, UK imperial, and US dry all serve different purposes, but their ounce counts are not interchangeable.

A US liquid pint equals 16 US fluid ounces, as defined by the US customary system under the authority of the National Institute of Standards and Technology.

– NIST (US measurement authority)

A UK imperial pint equals 20 imperial fluid ounces, set by the Weights and Measures Act 1824 and enforced for beer and milk sales.

– The Oxford Companion to Beer (brewing reference)

For anyone buying produce in US markets, the lesson is simple: a pint of blueberries is defined by volume, not weight. If you’re trying to compare prices per ounce, you need to check whether the store is selling by dry pint or by pound — two very different numbers.

Related reading

• 5 cm to Inches: Conversion, Size Comparisons & Visuals
• Men to Women Shoe Size Conversion: Chart & Calculator

Frequently asked questions