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.
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.
1 gal = 133.227631 fl oz (imp)
Let’s say you want to convert 100 gal to fl oz (imp).
Using the formula:
100 × 133.227631 = 13322.763 fl oz (imp)
So, 100 gal is approximately 13322.763 fl oz (imp).
| Gallon (US) (gal) | Fluid Ounce (Imperial) (fl oz (imp)) |
|---|---|
| 1 gal | 133.228 fl oz (imp) |
| 2 gal | 266.455 fl oz (imp) |
| 3 gal | 399.683 fl oz (imp) |
| 4 gal | 532.911 fl oz (imp) |
| 5 gal | 666.138 fl oz (imp) |
| 6 gal | 799.366 fl oz (imp) |
| 7 gal | 932.593 fl oz (imp) |
| 8 gal | 1065.821 fl oz (imp) |
| 9 gal | 1199.049 fl oz (imp) |
| 10 gal | 1332.276 fl oz (imp) |
| 11 gal | 1465.504 fl oz (imp) |
| 12 gal | 1598.732 fl oz (imp) |
| 13 gal | 1731.959 fl oz (imp) |
| 14 gal | 1865.187 fl oz (imp) |
| 15 gal | 1998.414 fl oz (imp) |