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.
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.
1 tsp (imp) = 0.200159 fl oz
Let’s say you want to convert 100 tsp (imp) to fl oz.
Using the formula:
100 × 0.200159 = 20.016 fl oz
So, 100 tsp (imp) is approximately 20.016 fl oz.
| Teaspoon (Imperial) (tsp (imp)) | Fluid Ounce (US) (fl oz) |
|---|---|
| 1 tsp (imp) | 0.2 fl oz |
| 2 tsp (imp) | 0.4 fl oz |
| 3 tsp (imp) | 0.6 fl oz |
| 4 tsp (imp) | 0.801 fl oz |
| 5 tsp (imp) | 1.001 fl oz |
| 6 tsp (imp) | 1.201 fl oz |
| 7 tsp (imp) | 1.401 fl oz |
| 8 tsp (imp) | 1.601 fl oz |
| 9 tsp (imp) | 1.801 fl oz |
| 10 tsp (imp) | 2.002 fl oz |
| 11 tsp (imp) | 2.202 fl oz |
| 12 tsp (imp) | 2.402 fl oz |
| 13 tsp (imp) | 2.602 fl oz |
| 14 tsp (imp) | 2.802 fl oz |
| 15 tsp (imp) | 3.002 fl oz |