Q:

How many teaspoons are there in 1 U.S. fluid ounce?

A:

There are six teaspoons in 1 U.S. fluid ounce. The U.S. fluid ounce is also equivalent to 2 tablespoons, 1/2 U.S. cup and 1/16 U.S. pint.

 

The fluid ounce should not be confused and is not interchangeable with ounce, which is a unit of mass. However, when the context is clear that the unit of measurement is referring to liquids such as in cooking recipes or pharmacological preparations, then the unit of measurement may be referred to simply in ounces.

The U.S. fluid ounce is slightly different from the imperial system ounce. One U.S. fluid ounce is about 1.040842731 imperial fluid ounces. Although similar to the imperial system of measurement, the U.S. customary units is slightly different from the current imperial system. Both systems of measurements were derived from the older English measurement systems. However, the current imperial system was revised and standardized, through the British Weights and Measures Act of 1824.

The U.S. customary system retained the older English system of measurements including the fluid ounce. The U.S. fluid ounce is based on the old English measurement of the wine gallon, which measures 231 cubic inches. Originally, the fluid ounce is defined as the space occupied by an ounce of any substance such as wine or water. The 1824 British measurement act redefined the imperial gallon as measuring exactly 10 pounds of water and can be exactly divided into 4 quarts, the 4 quarts can be divided into 4 gills and the gill can be divided into 5 ounces.

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