There are dozens and dozens of different varieties of grapes throughout the world. They range in size from as small as a quarter inch up to about 2 inches in diameter. They also come in a multiplicity of colours, ranging from yellow to green, to red and purple.
It’s almost impossible to pinpoint an accurate measure of grapes per cup, as even within a given variety, size and shape can sometimes vary. Still our very best guess would put the number at 10 to 40 grapes per 1 cup, depending on the variety being measured.
A cup of tiny champagne grapes could hold as much as 40, while only about 10 or less large concord grapes would fit in a cup.
For buying purposes, as it relates to regular purple and green table grapes, one pound of grapes is the equivalent of about 2.5 cups.
Grapes are an excellent source of vitamins and a great fruit for those who are watching their calorie intake. A 1-cup serving of table grapes will contain about 104 calories, 23 grams of sugar, 3 milligrams of sodium, 27 grams of carbohydrates, and 1 gram of protein.
For long lasting storage, grapes can be frozen for up to 12 months in an airtight, freezer-safe container. Otherwise, grapes can be stored, unwashed, in the refrigerator for up to a week with no spoilage.