Interesting fact: Grape weight is usually estimated by cup or bunch because individual grapes vary a lot.
The answer: Typically, a cup of grapes weighs about 150 to 170 grams (5.3 to 6 ounces). The exact weight depends on size, variety, preparation, brand, and how much edible or non-edible material is included.
Fruit weights change with ripeness, seed size, water content, and variety. Knowing a typical range is useful for recipes, lunch packing, calorie estimates, grocery planning, and understanding why one piece can feel much heavier than another.
