**How Many Ounces Equal 2/3 Cup?** – **In United States customary units of measurement, the cup holds 8 ounces of fluid. 2/3 of 8 fluid ounces is 5.28 U.S. fluid ounces, if the U.S. fluid cup is equivalent to 8 fluid ounces.**

In contrast, a cup in the British imperial system holds 10 imperial fluid ounces. 6.6 imperial fluid ounces are equal to two-thirds of 10 imperial fluid ounces. The majority of measurements in the customary and imperial systems of the United States are identical.

Despite the fact that both systems use the same names for the measurement units, there are differences in the fluid volume measurements between the two systems.

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## Recipes with Fractions

For some, visualising fractions in recipe portions is simple, while for others it can be difficult. Fractions represent a portion of a whole. Two-thirds or 2/3, for instance, indicates that a whole is divided into three equal portions, or “thirds,” and that a part of the whole measures two of the three equal portions.

Fractions are composed of a top number known as the numerator and a bottom number known as the denominator. Between these upper and lower numbers is a line known as a “vinculum.”

## The Conversion of Fractions to Decimals

Using a digital kitchen scale is a straightforward solution for those who struggle to visualise fractions in recipes. Since kitchen scales do not display fractions, the fractions must first be converted to decimals. So how do you accomplish this?

Given that fractions represent division, the “vinculum” or dividing line is placed between the numerator and denominator. To convert a fraction to its decimal equivalent, divide the numerator by the denominator. The result is the fraction in decimal form. For instance, 2/3 or 2 3 equals. 66.

This makes calculating the 2/3 or.66 portion of a cup in ounces easier. Multiply 8 by 0.66 to obtain the ounce volume of 2/3 of a cup, given that U.S. cups hold 8 ounces. The same formula applies to the imperial system, with the imperial cup holding 10 ounces as opposed to 8 ounces.

US Customary Volume Measurements Versus British Imperial Volume Measurements

Despite the fact that both the U.S. customary and imperial systems were derived from the English system, there is a slight difference between the two systems’ fluid volume unit measurements. Using the metric system as a comparison tool, the following differences are illustrated:

1 United States customary fluid ounce equals 29.573 millilitres

1 imperial fluid ounce equals 28.413 millilitres

1 US customary cup equals 236.584 millilitres

1 imperial cup equals 295.57 millilitres

1 U.S. pint equals 473.176 millilitres

1 imperial pint equals 568.261 millilitres

1 US quart equals 940 mL

1 imperial quart equals 1,130 millilitres or 1.13 litres

1 U.S. gallon equals 3,780 millilitres or 3.78 litres

1 imperial gallon equals 4,540 millilitres or 4.54 litres

The American customary pint contains 16 fluid ounces, while the imperial pint contains 20 fluid ounces. Both systems use quart units that are equivalent to 2 pints and gallon units that are equal to 4 quarts.

## Is it American or British?

Figuring out whether the units specified in an online recipe are in U.S. customary or imperial is a common challenge for those who follow recipes found online. Look for cup and gill measurements to determine whether the measurements are in U.S. customary or imperial.

The British rarely use “cups” when measuring ingredients for recipes, while Americans are largely unfamiliar with “gills.” It is also important to note that British recipes are typically measured by weight rather than scoops.

## Cup, Metric System

Some recipes may occasionally specify a metric system cup. The metric system cup is precisely 250 mL, which is comparable to the standard American cup. Two-thirds of a metric system cup, or 0.66 of a cup, is 164 mL, which is equivalent to 5.59 fluid ounces.