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 quart (US) is a unit of liquid volume in the U.S. customary system, equal to 32 US fluid ounces or approximately 946.353 milliliters. It's abbreviated as qt and is defined as one-fourth of a US gallon. A quart is also twice the size of a US pint and one-eighth of a gallon, making it a convenient middle-range measurement for recipes, packaging, and household use.
In American kitchens, the quart is commonly used for liquids like milk, broth, juice, and cooking oils. It's a standard size for measuring cups and storage containers and is widely seen in both home cooking and grocery products.
Uses: The US quart is frequently used in recipes that call for larger volumes of liquid soups, stews, stocks, and marinades. It's also a common reference point for batch cooking and food storage. Many kitchen containers and measuring pitchers are marked in quarts, making it easy for home cooks to portion ingredients accurately.
Outside the kitchen, quarts are used in food and beverage packaging, such as milk cartons, ice cream tubs, and juice bottles. The unit also appears in automotive contexts, where motor oil is sold in quarts. Thanks to its versatility and widespread recognition, the quart continues to be a trusted unit in both culinary and everyday settings.
1 fl oz (imp) = 0.030024 qt
Let’s say you want to convert 100 fl oz (imp) to qt.
Using the formula:
100 × 0.030024 = 3.002 qt
So, 100 fl oz (imp) is approximately 3.002 qt.
| Fluid Ounce (Imperial) (fl oz (imp)) | Quart (US) (qt) |
|---|---|
| 1 fl oz (imp) | 0.03 qt |
| 2 fl oz (imp) | 0.06 qt |
| 3 fl oz (imp) | 0.09 qt |
| 4 fl oz (imp) | 0.12 qt |
| 5 fl oz (imp) | 0.15 qt |
| 6 fl oz (imp) | 0.18 qt |
| 7 fl oz (imp) | 0.21 qt |
| 8 fl oz (imp) | 0.24 qt |
| 9 fl oz (imp) | 0.27 qt |
| 10 fl oz (imp) | 0.3 qt |
| 11 fl oz (imp) | 0.33 qt |
| 12 fl oz (imp) | 0.36 qt |
| 13 fl oz (imp) | 0.39 qt |
| 14 fl oz (imp) | 0.42 qt |
| 15 fl oz (imp) | 0.45 qt |