A fluid ounce (US) is a unit of volume used to measure liquids in the U.S. customary system. It's abbreviated as fl oz and is commonly seen in cooking, nutrition labeling, and liquid packaging. One US fluid ounce is defined as 1/128 of a US gallon, which equals exactly 29.5735 milliliters.
Despite the term "ounce" also being used for weight, a fluid ounce specifically measures liquid volume. It's important to distinguish the two, especially in recipes or products where both liquid and solid measurements appear. The US fluid ounce is a standard unit across many industries, from beverages and sauces to cleaning products and personal care items,
Uses: The fluid ounce is widely used in everyday life throughout the United States. In the kitchen, it shows up in recipes for measuring water, milk, oil, and other liquids. You'll also find it on nutrition labels, drink containers, and liquid medicine bottles. Most bottled drinks sold in the U.S., from soda cans to sports drinks, are labeled in fluid ounces.
Outside the kitchen, fluid ounces are also used to measure everyday products like shampoo, lotion, and household cleaners. Packaging labels often list fluid ounces to help shoppers gauge how much liquid is inside each bottle. In pharmacies, you may still see fluid ounces on medication packaging, though many prescriptions now use milliliters for greater accuracy and consistency.
The imperial quart is a unit of volume from the imperial system, primarily used in the United Kingdom and some Commonwealth countries. One imperial quart equals 1.13652 liters or 40 imperial fluid ounces, making it larger than the US quart, which holds about 946 milliliters. It's abbreviated as qt and traditionally used to measure liquids and dry goods in household and commercial settings.
In the imperial system, a quart is equal to one-fourth of a gallon and twice the volume of a pint. Though metric units have largely replaced imperial measures in the UK, the quart still appears in older recipes, cooking references, and some product labels—especially in contexts where traditional measurements remain familiar and practical.
Uses: The imperial quart is often seen in vintage British recipes, where it's used to measure liquids like broth, milk, or cream. It also shows up in older cookbooks, measuring jugs, and kitchenware that still use imperial markings. While not as common in everyday packaging today, you might still encounter quarts in contexts like traditional food preparation or when referencing older British standards.
1 fl oz = 0.026021 qt (imp)
Let’s say you want to convert 100 fl oz to qt (imp).
Using the formula:
100 × 0.026021 = 2.602 qt (imp)
So, 100 fl oz is approximately 2.602 qt (imp).
| Fluid Ounce (US) (fl oz) | Quart (Imperial) (qt (imp)) |
|---|---|
| 1 fl oz | 0.026 qt (imp) |
| 2 fl oz | 0.052 qt (imp) |
| 3 fl oz | 0.078 qt (imp) |
| 4 fl oz | 0.104 qt (imp) |
| 5 fl oz | 0.13 qt (imp) |
| 6 fl oz | 0.156 qt (imp) |
| 7 fl oz | 0.182 qt (imp) |
| 8 fl oz | 0.208 qt (imp) |
| 9 fl oz | 0.234 qt (imp) |
| 10 fl oz | 0.26 qt (imp) |
| 11 fl oz | 0.286 qt (imp) |
| 12 fl oz | 0.312 qt (imp) |
| 13 fl oz | 0.338 qt (imp) |
| 14 fl oz | 0.364 qt (imp) |
| 15 fl oz | 0.39 qt (imp) |