Blueberries serving size, cups to grams
Here a serving of raw blueberries is counted as 1 cup, which USDA weighs at 5.2 oz (148 g), with 85 calories and 1 g protein. 100 g (3.5 oz) is about 2/3 cup.
Serving sizes of raw blueberries
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 5.2 oz (148 g) | 85 calories | 1 g | 21.6 g | 0.45 g |
| 1 oz | 1 oz (28 g) | 16 calories | 0.2 g | 4.1 g | 0.09 g |
| 100 g | 3.5 oz (100 g) | 57 calories | 0.7 g | 14.6 g | 0.31 g |
Cups to grams
USDA weighs 1 cup of raw blueberries at 148 g. Smaller cup measures follow from it.
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 5.2 oz (148 g) | 85 calories |
| 3/4 cup | 3.9 oz (111 g) | 64 calories |
| 2/3 cup | 3.5 oz (99 g) | 57 calories |
| 1/2 cup | 2.6 oz (74 g) | 42 calories |
| 1/3 cup | 1.7 oz (49 g) | 28 calories |
| 1/4 cup | 1.3 oz (37 g) | 21 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 1/4 cup | 16 calories |
| 100 g (3.5 oz) | 2/3 cup | 57 calories |
| 1 lb (454 g) | 3 1/8 cups | 260 calories |
What 3.5 oz (100 g) of blueberries looks like
3.5 oz (100 g) of raw blueberries is 3.5 oz, or about 2/3 cup. It has 57 calories, 0.7 g protein, 14.6 g carbs and 0.31 g fat.
Raw, cooked and other forms
The same measure weighs differently once food is cooked, dried or canned, and so do the calories in it. USDA numbers for each form:
| Form | USDA measure | Calories per 3.5 oz (100 g) | Protein per 3.5 oz (100 g) |
|---|---|---|---|
| Raw blueberries | 1 cup: 5.2 oz (148 g) | 57 calories | 0.7 g |
| Frozen unsweetened blueberries | 1 cup (unthawed): 5.5 oz (155 g) | 51 calories | 0.42 g |
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-13)
- Raw blueberries: Blueberries, raw, FDC ID 2346411 (Foundation Foods, published 2022-10-28)
- Frozen unsweetened blueberries: Blueberries, frozen, unsweetened (Includes foods for USDA's Food Distribution Program), FDC ID 173950 (SR Legacy, published 2019-04-01)
- 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.