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.
A cubic inch is a unit of volume used in the imperial and U.S. customary systems. It represents the space occupied by a cube, with each side measuring exactly one inch. One cubic inch is equal to 16.387 milliliters or approximately 0.0005787 cubic feet, and it's abbreviated as in³.
The cubic inch is often used to measure smaller volumes in areas like automotive design, mechanical components, and product manufacturing. It’s a go-to unit for things like engine size, compact storage, and custom parts where detailed, space-specific measurements are needed.
Uses: The cubic inch is most widely recognized in the automotive world, where it's often used to express engine size—especially in classic American vehicles. It's also used in engineering and manufacturing for parts design, packaging, and product specifications where precision is important.
In everyday use, you might see cubic inches listed when measuring the internal dimensions of a drawer, estimating the volume of a small box, or comparing product capacities. It remains a trusted unit for capturing volume in tight spaces where accuracy matters.
1 fl oz (imp) = 1.73387 in³
Let’s say you want to convert 100 fl oz (imp) to in³.
Using the formula:
100 × 1.73387 = 173.387 in³
So, 100 fl oz (imp) is approximately 173.387 in³.
| Fluid Ounce (Imperial) (fl oz (imp)) | Cubic inch (in³) |
|---|---|
| 1 fl oz (imp) | 1.734 in³ |
| 2 fl oz (imp) | 3.468 in³ |
| 3 fl oz (imp) | 5.202 in³ |
| 4 fl oz (imp) | 6.935 in³ |
| 5 fl oz (imp) | 8.669 in³ |
| 6 fl oz (imp) | 10.403 in³ |
| 7 fl oz (imp) | 12.137 in³ |
| 8 fl oz (imp) | 13.871 in³ |
| 9 fl oz (imp) | 15.605 in³ |
| 10 fl oz (imp) | 17.339 in³ |
| 11 fl oz (imp) | 19.073 in³ |
| 12 fl oz (imp) | 20.806 in³ |
| 13 fl oz (imp) | 22.54 in³ |
| 14 fl oz (imp) | 24.274 in³ |
| 15 fl oz (imp) | 26.008 in³ |