An imperial pint is one eighth of an imperial gallon.
Imperial pints to Fluid ounces Converter — imp pt to fl oz
Convert Imperial pint (imp pt) to Fluid ounce (fl oz) using the exact conversion factor (1 imperial pint = 19.21519881 fluid ounce). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Imperial pints to Fluid ounces converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US fluid ounce is 1/128 of a US gallon.
Result = input x 0.00056826125 / 2.95735296e-5.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial pints to Fluid ounces
Imperial pint and Fluid ounce appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Imperial pint is typically associated with united Kingdom, Ireland (beer and cider serving is legally defined in imperial pints), while Fluid ounce is typically associated with united States (beverage, nutrition labeling).
Formula
fluid ounces = imperial pints × 19.2151988081
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial pint equals 0.00056826125 base units, and 1 fluid ounce equals 0.0000295735295625 base units, so dividing one by the other gives the direct imperial pint-to-fluid ounce factor of 19.2151988081.
Simple example
1 imp pt × 19.21519881 = 19.21519881 fl oz
1 imperial pint = 19.21519881 fluid ounces.
Real-world example
10 imp pt × 19.21519881 = 192.1519881 fl oz
10 imperial pints = 192.1519881 fluid ounces.
Conversion table
| Imperial pint (imp pt) | Fluid ounce (fl oz) |
|---|---|
| 1 imp pt | 19.21519881 fl oz |
| 5 imp pt | 96.07599404 fl oz |
| 10 imp pt | 192.1519881 fl oz |
| 25 imp pt | 480.3799702 fl oz |
| 50 imp pt | 960.7599404 fl oz |
| 100 imp pt | 1,921.519881 fl oz |
Reverse conversion: Fluid ounce to Imperial pint
19.21519881 fl oz × 0.05204213654 = 1 imp pt
19.21519881 fluid ounces = 1 imperial pints.
imperial pints = fluid ounces × 0.0520421365393
For a page dedicated to this direction, see Fluid ounce to Imperial pint.
Imperial pint vs. Fluid ounce
| Aspect | Imperial pint | Fluid ounce |
|---|---|---|
| Family | UK/imperial customary unit | US customary unit |
| Typical use | UK and Irish pub beer/cider serving (a legally protected serving size) | US beverage container sizing (soda, water bottles) |
| Where it's used | United Kingdom, Ireland (beer and cider serving is legally defined in imperial pints) | United States (beverage, nutrition labeling) |
Understanding the Imperial pint
Imperial pint (imp pt) measures volume. The imperial pint is one-eighth of an imperial gallon: exactly 0.56826125 liters — notably the standard UK beer serving size. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom, Ireland (beer and cider serving is legally defined in imperial pints)
Imperial pint vs. US pint. The imperial pint (568 mL) is about 20% larger than the US pint (473 mL) — a British 'pint of beer' is meaningfully more beer than an American one.
Uses of the Imperial pint today
- UK and Irish pub beer/cider serving (a legally protected serving size)
- UK milk delivery (historically and in some contexts still)
History of the Imperial pint
The imperial pint follows from Britain's 1824 imperial gallon; it remains legally protected as the mandatory serving measure for draught beer and cider in UK and Irish pubs, one of the few contexts where imperial units remain legally mandated in the UK's otherwise largely metric system.
Historical origin. Imperial pint was not the invention of a single named person; it developed through the process described above.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Imperial pint — sources
- UK Weights and Measures Act 1985 — Maintains the imperial pint as the legal draught beer/cider serving measure.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fluid ounces are in 1 imperial pint?
1 imperial pint equals 19.21519881 fluid ounces, using the exact defined conversion factor rather than an estimate.
How do I convert imperial pint to fluid ounce?
Multiply the imperial pint value by 19.21519881. The converter above does this instantly to whatever precision you set.
How do I convert fluid ounce back to imperial pint?
Use the reverse factor: 1 fluid ounce equals 0.0520421365 imperial pints. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial pint?
Imperial pint (imp pt) measures volume. The imperial pint is one-eighth of an imperial gallon: exactly 0.56826125 liters — notably the standard UK beer serving size. It is classified as a UK/imperial customary unit.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Is the imperial pint to fluid ounce conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between imperial pint vs. us pint?
The imperial pint (568 mL) is about 20% larger than the US pint (473 mL) — a British 'pint of beer' is meaningfully more beer than an American one.
Where is the imperial pint still used today?
United Kingdom, Ireland (beer and cider serving is legally defined in imperial pints)