Grapes serving size, cups to grams
Here a serving of grapes is counted as 1 cup, which USDA weighs at 5.3 oz (151 g), with 104 calories and 1.1 g protein. 100 g (3.5 oz) is about 2/3 cup.
The reference serving USDA lists for US Nutrition Facts labels (NLEA serving) is 4.4 oz (126 g). Packaged products may use a different serving, so check the label.
Serving sizes of grapes
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 5.3 oz (151 g) | 104 calories | 1.1 g | 27.3 g | 0.24 g |
| 10 grapes | 1.7 oz (49 g) | 34 calories | 0.35 g | 8.9 g | 0.08 g |
| 1 oz | 1 oz (28 g) | 20 calories | 0.2 g | 5.1 g | 0.05 g |
| 100 g | 3.5 oz (100 g) | 69 calories | 0.72 g | 18.1 g | 0.16 g |
Cups to grams
USDA weighs 1 cup of grapes at 151 g. Smaller cup measures follow from it.
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 5.3 oz (151 g) | 104 calories |
| 3/4 cup | 4 oz (113 g) | 78 calories |
| 2/3 cup | 3.6 oz (101 g) | 69 calories |
| 1/2 cup | 2.7 oz (76 g) | 52 calories |
| 1/3 cup | 1.8 oz (50 g) | 35 calories |
| 1/4 cup | 1.3 oz (38 g) | 26 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 1/4 cup | 20 calories |
| 100 g (3.5 oz) | 2/3 cup | 69 calories |
| 1 lb (454 g) | 3 cups | 313 calories |
What 3.5 oz (100 g) of grapes looks like
3.5 oz (100 g) of grapes is 3.5 oz, or about 2/3 cup. It has 69 calories, 0.72 g protein, 18.1 g carbs and 0.16 g fat.
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-13)
- Raw grapes (red or green): Grapes, red or green (European type, such as Thompson seedless), raw, FDC ID 174683 (SR Legacy, published 2019-04-01) · full nutrition facts
- Kitchen measures (1 cup = 16 tbsp, 1 tbsp = 3 tsp): NDSU Extension, Ingredient Substitutions (FN198, J. Garden-Robinson, April 2013 edition). https://www.extension.purdue.edu/extmedia/HHS/HHS-784-W.pdf (accessed 2026-10-12)
How we calculate: each household measure is the gram weight USDA lists for this food. Calories and nutrients are the USDA values per 3.5 oz (100 g) scaled to that weight. 1 oz = 28.35 g and 1 lb = 453.6 g. Cup fractions are rounded to the nearest kitchen measure. A dash (—) means USDA reports no value. How we verify.