The imperial teaspoon is a unit of volume used primarily in the United Kingdom and other countries that once followed the imperial measurement system. It's slightly smaller than the US teaspoon, with one imperial teaspoon equal to 4.7355 milliliters. This unit is abbreviated as tsp and has historically appeared in older British cookbooks and kitchenware.
While the imperial system has been largely replaced by the metric system in the UK, many traditional recipes and household items still reference the imperial teaspoon. It's part of a broader set of imperial volume measurements, including tablespoons, fluid ounces, and pints.
Uses: The imperial teaspoon was once a standard unit in British kitchens, used to measure ingredients like sugar, baking powder, and liquid extracts. Though the UK officially uses the metric system today, imperial units still appear in everyday cooking, particularly in family recipes passed down through generations.
You may also see the imperial teaspoon referenced in medication dosages or on packaging in regions that retain imperial labeling. While modern measuring tools often default to metric or US volumes, the imperial teaspoon remains relevant for those following traditional British cooking or converting older recipes accurately.
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 tsp (imp) = 0.208333 fl oz (imp)
Let’s say you want to convert 100 tsp (imp) to fl oz (imp).
Using the formula:
100 × 0.208333 = 20.833 fl oz (imp)
So, 100 tsp (imp) is approximately 20.833 fl oz (imp).
| Teaspoon (Imperial) (tsp (imp)) | Fluid Ounce (Imperial) (fl oz (imp)) |
|---|---|
| 1 tsp (imp) | 0.208 fl oz (imp) |
| 2 tsp (imp) | 0.417 fl oz (imp) |
| 3 tsp (imp) | 0.625 fl oz (imp) |
| 4 tsp (imp) | 0.833 fl oz (imp) |
| 5 tsp (imp) | 1.042 fl oz (imp) |
| 6 tsp (imp) | 1.25 fl oz (imp) |
| 7 tsp (imp) | 1.458 fl oz (imp) |
| 8 tsp (imp) | 1.667 fl oz (imp) |
| 9 tsp (imp) | 1.875 fl oz (imp) |
| 10 tsp (imp) | 2.083 fl oz (imp) |
| 11 tsp (imp) | 2.292 fl oz (imp) |
| 12 tsp (imp) | 2.5 fl oz (imp) |
| 13 tsp (imp) | 2.708 fl oz (imp) |
| 14 tsp (imp) | 2.917 fl oz (imp) |
| 15 tsp (imp) | 3.125 fl oz (imp) |