What Is 2/3 Cup?

Common equivalents for 2/3 cup

How to measure 2/3 cup without a 2/3-cup measuring cup

• Use two 1/3-cup scoops. This is the simplest method if a 1/3-cup measure is on hand — most standard measuring cup sets include one.
• Use a 1-cup measure and stop at the 2/3 mark, if the cup has fraction markings printed on the side.
• Measure by tablespoons: scoop 10 level tablespoons, then add 2 more teaspoons.

Halving a recipe that calls for 2/3 cup: half of 2/3 cup is 1/3 cup, since half of anything is the same as dividing the fraction by 2 (2/3 ÷ 2 = 2/6 = 1/3).

Doubling a recipe that calls for 2/3 cup: double of 2/3 cup is 1 1/3 cups, since 2/3 × 2 = 4/3 = 1 1/3.

Why this measurement causes confusion: 2/3 isn't a marking found on every measuring cup or spoon set, and it doesn't divide evenly into whole tablespoons (it lands at 10 tablespoons plus a partial 2 teaspoons), which is why so many people search for the conversion instead of just doing the math while cooking.

The closest sibling pages are What Is Half of 1/4 Cup? and How Deep Is Lake Tahoe?.

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