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 gallon (US) is a large unit of volume used in the U.S. customary measurement system. One US gallon is equal to 128 US fluid ounces, or approximately 3.785 liters. It's commonly abbreviated as gal and is often used for measuring larger quantities of liquids in household and commercial settings.
As one of the largest common units for liquid measurement in the United States, the gallon is widely recognized for storing and transporting liquids like milk, water, and gasoline. Its size makes it practical for bulk quantities and remains a standard unit in industries ranging from agriculture to retail packaging.
Uses: In everyday life, the US gallon is most commonly seen on milk jugs, bottled water, and fuel pumps. Whether you're filling up a gas tank or picking up a gallon of juice at the grocery store, this unit is a familiar part of American routines.
Beyond the home, the gallon is used across industries that handle large volumes—such as food service, chemical production, and farming. It's also a staple in recipes or instructions for making batches of beverages, soups, or cleaning solutions. Thanks to its capacity and widespread use, the gallon remains one of the most practical and recognizable units for measuring liquids in bulk.
1 fl oz (imp) = 0.007506 gal
Let’s say you want to convert 100 fl oz (imp) to gal.
Using the formula:
100 × 0.007506 = 0.751 gal
So, 100 fl oz (imp) is approximately 0.751 gal.
| Fluid Ounce (Imperial) (fl oz (imp)) | Gallon (US) (gal) |
|---|---|
| 1 fl oz (imp) | 0.008 gal |
| 2 fl oz (imp) | 0.015 gal |
| 3 fl oz (imp) | 0.023 gal |
| 4 fl oz (imp) | 0.03 gal |
| 5 fl oz (imp) | 0.038 gal |
| 6 fl oz (imp) | 0.045 gal |
| 7 fl oz (imp) | 0.053 gal |
| 8 fl oz (imp) | 0.06 gal |
| 9 fl oz (imp) | 0.068 gal |
| 10 fl oz (imp) | 0.075 gal |
| 11 fl oz (imp) | 0.083 gal |
| 12 fl oz (imp) | 0.09 gal |
| 13 fl oz (imp) | 0.098 gal |
| 14 fl oz (imp) | 0.105 gal |
| 15 fl oz (imp) | 0.113 gal |