An imperial pint is one eighth of an imperial gallon.
Imperial pints to Imperial gallons Converter — imp pt to imp gal
Convert Imperial pint (imp pt) to Imperial gallon (imp gal) using the exact conversion factor (1 imperial pint = 0.125 imperial gallon). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Imperial pints to Imperial gallons 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.
An imperial gallon is exactly 4.54609 liters.
Result = input x 0.00056826125 / 0.00454609.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial pints to Imperial gallons
Imperial pint and Imperial gallon 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 Imperial gallon is typically associated with united Kingdom, Canada (some contexts), and other Commonwealth countries.
Formula
imperial gallons = imperial pints × 0.125
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 imperial gallon equals 0.00454609 base units, so dividing one by the other gives the direct imperial pint-to-imperial gallon factor of 0.125.
Simple example
1 imp pt × 0.125 = 0.125 imp gal
1 imperial pint = 0.125 imperial gallons.
Real-world example
10 imp pt × 0.125 = 1.25 imp gal
10 imperial pints = 1.25 imperial gallons.
Conversion table
| Imperial pint (imp pt) | Imperial gallon (imp gal) |
|---|---|
| 1 imp pt | 0.125 imp gal |
| 5 imp pt | 0.625 imp gal |
| 10 imp pt | 1.25 imp gal |
| 25 imp pt | 3.125 imp gal |
| 50 imp pt | 6.25 imp gal |
| 100 imp pt | 12.5 imp gal |
Reverse conversion: Imperial gallon to Imperial pint
0.125 imp gal × 8 = 1 imp pt
0.125 imperial gallons = 1 imperial pint.
imperial pints = imperial gallons × 8
For a page dedicated to this direction, see Imperial gallon to Imperial pint.
Imperial pint vs. Imperial gallon
| Aspect | Imperial pint | Imperial gallon |
|---|---|---|
| Family | UK/imperial customary unit | UK/imperial customary unit |
| Typical use | UK and Irish pub beer/cider serving (a legally protected serving size) | UK fuel and beverage measurement (historically; UK now primarily uses liters for retail) |
| Where it's used | United Kingdom, Ireland (beer and cider serving is legally defined in imperial pints) | United Kingdom, Canada (some contexts), and other Commonwealth countries |
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 Imperial gallon
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom, Canada (some contexts), and other Commonwealth countries
Imperial gallon vs. US gallon. Britain's 1824 Weights and Measures Act defined a new gallon based on 10 pounds of water, replacing the old wine gallon the US had already adopted — leaving the US (3.785 L) and imperial (4.546 L) gallons about 20% apart today.
Uses of the Imperial gallon today
- UK fuel and beverage measurement (historically; UK now primarily uses liters for retail)
- Commonwealth country liquid measurement in some contexts
History of the Imperial gallon
The imperial gallon was created by Britain's Weights and Measures Act of 1824, defined as the volume of 10 pounds of water, replacing several inconsistent older English gallon definitions (wine gallon, ale gallon, corn gallon) with one standard.
Historical origin. Imperial gallon 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.
Imperial gallon — sources
- UK Weights and Measures Act 1824 — Establishes the imperial gallon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallons are in 1 imperial pint?
1 imperial pint equals 0.125 imperial gallons, using the exact defined conversion factor rather than an estimate.
How do I convert imperial pint to imperial gallon?
Multiply the imperial pint value by 0.125. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon back to imperial pint?
Use the reverse factor: 1 imperial gallon equals 8 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 imperial gallon?
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
Is the imperial pint to imperial gallon conversion exact?
Yes. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. 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)