The imperial fluid ounce is a unit of volume from the imperial measurement system, traditionally used in the United Kingdom and other Commonwealth countries. One imperial fluid ounce is equal to 28.4131 milliliters, which makes it slightly larger than the US fluid ounce (approximately 29.57 mL in the US system). It's commonly abbreviated as fl oz and was widely used for measuring liquids in recipes, packaging, and day-to-day household tasks.
Uses: The imperial fluid ounce was once a standard unit in British kitchens, used to measure ingredients such as milk, oil, and other cooking liquids. While most modern recipes in the UK now use milliliters or grams, many older or traditional recipes still list quantities in fluid ounces. This makes the unit especially relevant for those cooking from classic British cookbooks or following long-standing family recipes.
The imperial fluid ounce still appears on many UK labels, especially for drinks, personal care products, and older medicinal packaging. Whether you're following a traditional recipe or measuring from labeled packaging, knowing how this unit works helps you convert accurately and maintain consistency.
The imperial gallon is a unit of volume used in the imperial measurement system, and it is historically common in the United Kingdom and several other countries. One imperial gallon is equal to 4.54609 liters, which makes it significantly larger than the US gallon (approximately 3.785 liters). It is abbreviated as gal and traditionally used for measuring liquids in larger quantities.
In the imperial system, a gallon is made up of four quarts, eight pints, or 160 imperial fluid ounces. Though the UK has officially adopted the metric system, the imperial gallon is still recognized in specific contexts and remains part of British measurement history. It's most commonly associated with fuel pricing and older food or drink packaging.
Uses: The imperial gallon is most commonly seen today at fuel stations in the UK, where petrol and diesel are still sold by the gallon for pricing comparisons, even though the actual quantity delivered is measured in liters. Historically, the gallon was used for everything from milk deliveries to beer and cider sales.
While modern recipes and packaging have largely shifted to liters and milliliters, the imperial gallon occasionally appears in traditional instructions or product specs, especially for bulk liquids. For those referencing older materials or converting classic measurements, the imperial gallon remains a useful and historically significant unit.
1 fl oz (imp) = 0.00625 gal (imp)
Let’s say you want to convert 100 fl oz (imp) to gal (imp).
Using the formula:
100 × 0.00625 = 0.625 gal (imp)
So, 100 fl oz (imp) is approximately 0.625 gal (imp).
| Fluid Ounce (Imperial) (fl oz (imp)) | Gallon (Imperial) (gal (imp)) |
|---|---|
| 1 fl oz (imp) | 0.006 gal (imp) |
| 2 fl oz (imp) | 0.013 gal (imp) |
| 3 fl oz (imp) | 0.019 gal (imp) |
| 4 fl oz (imp) | 0.025 gal (imp) |
| 5 fl oz (imp) | 0.031 gal (imp) |
| 6 fl oz (imp) | 0.038 gal (imp) |
| 7 fl oz (imp) | 0.044 gal (imp) |
| 8 fl oz (imp) | 0.05 gal (imp) |
| 9 fl oz (imp) | 0.056 gal (imp) |
| 10 fl oz (imp) | 0.063 gal (imp) |
| 11 fl oz (imp) | 0.069 gal (imp) |
| 12 fl oz (imp) | 0.075 gal (imp) |
| 13 fl oz (imp) | 0.081 gal (imp) |
| 14 fl oz (imp) | 0.088 gal (imp) |
| 15 fl oz (imp) | 0.094 gal (imp) |