Imperial fluid ounce to Imperial pint
imp fl oz
imp pt
Conversion History
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|---|---|---|
| No conversion history to show. | ||
Quick Reference Table (Imperial fluid ounce to Imperial pint)
| Imperial fluid ounce (imp fl oz) | Imperial pint (imp pt) |
|---|---|
| 0.5 | 0.02499999999989635049 |
| 1 | 0.04999999999979270098 |
| 2 | 0.09999999999958540196 |
| 5 | 0.2499999999989635049 |
| 10 | 0.4999999999979270098 |
| 20 | 0.99999999999585401961 |
About Imperial fluid ounce (imp fl oz)
The imperial fluid ounce (imp fl oz) is a unit of volume equal to one twentieth of an imperial pint, approximately 28.413 milliliters. It is used in the United Kingdom and Commonwealth countries, though metric units have replaced it in most commercial contexts. The imperial fluid ounce is slightly smaller than the US fluid ounce (29.574 mL). UK spirits measures are now defined by law in 25 mL and 35 mL metric measures, which do not align exactly with the imperial fluid ounce.
A single spirits measure in a UK bar is 25 mL or 35 mL — close to, but not exactly, one imperial fluid ounce (28.41 mL).
About Imperial pint (imp pt)
The imperial pint is a unit of volume equal to one eighth of an imperial gallon, approximately 568.3 milliliters (20 imperial fluid ounces). It is the standard serving size for draft beer and cider in the United Kingdom, Ireland, and Australia. Despite UK metrication, the pint survives as the legally mandated unit for selling draft beer and milk in UK pubs and shops. The imperial pint is notably 20% larger than the US liquid pint (473 mL).
A pint of beer in a UK or Irish pub is exactly 568 mL (1 imperial pint). A UK pint of milk is 568 mL.
Imperial fluid ounce – Frequently Asked Questions
Why did the UK abandon the fluid ounce for spirits but keep the pint for beer?
When the UK metricated in the 1990s, spirits measures were switched to 25 mL and 35 mL because publicans needed precise, legally enforceable pour sizes — and optic dispensers were easy to replace with metric ones. Beer, however, had enormous cultural resistance: the "pint" is deeply embedded in British pub identity, and the Campaign for Real Ale lobbied hard. Parliament granted an explicit exemption allowing draft beer and cider to be sold by the imperial pint. Milk got a similar exemption. The result is a hybrid system where your gin is metric but your beer is imperial.
How many imperial fluid ounces are in a UK pint?
There are exactly 20 imperial fluid ounces in one UK pint (568 mL). In the US system, 1 pint = 16 US fluid ounces (473 mL).
Is the imperial fluid ounce still used?
The imperial fluid ounce is rarely used for commercial transactions in the UK today, which metricated in the 1990s. UK spirits servings are now legally defined in metric (25 mL or 35 mL).
Why is a UK shot 25 mL not one fluid ounce?
When the UK metricated bar measures, the 25 mL "metric measure" replaced older imperial measures. One imperial fl oz (28.41 mL) was not adopted because the EU standardized on 25 mL. So UK shots are not exactly one fl oz.
How many milliliters are in an imperial fluid ounce?
One imperial fluid ounce equals approximately 28.413 mL. One US fluid ounce equals approximately 29.574 mL. Both round to roughly "30 mL" in casual usage, but the precise difference matters in pharmacology.
Imperial pint – Frequently Asked Questions
How many milliliters is a UK pint?
One imperial (UK) pint equals exactly 568.26 mL (20 imperial fluid ounces). A UK pint glass holds just over half a liter.
Why is beer still sold by the pint in the UK?
The UK is legally permitted to sell draft beer and cider in pints under exemptions to metrication rules. The pint is a protected official supplementary unit for draft alcohol. Milk may also be sold in pints.
Is an Irish pint the same as a UK pint?
Yes, an Irish pint is an imperial pint — 568 mL. A pint at an Irish pub is 20 imperial fluid ounces, identical to a UK pint.
How does an Australian pint compare to a UK pint?
In Australian pubs, a "pint" is technically 568 mL, but serving sizes vary by state. In South Australia and Western Australia, a "pint" is actually 425 mL. Australian glassware terminology is notoriously inconsistent.
How many fluid ounces are in an imperial pint?
One imperial pint equals exactly 20 imperial fluid ounces. A US pint equals 16 US fluid ounces. The fluid ounce sizes also differ slightly (28.41 mL imperial vs 29.57 mL US), compounding the pint size difference.