Corn serving size, cups to grams
Here a serving of raw sweet yellow corn is counted as 1 ear (small), which USDA weighs at 2.6 oz (73 g), with 63 calories and 2.4 g protein. One cup weighs 5.1 oz (145 g).
Serving sizes of raw sweet yellow corn
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 5.1 oz (145 g) | 125 calories | 4.7 g | 27.1 g | 2 g |
| 1 ear, small | 2.6 oz (73 g) | 63 calories | 2.4 g | 13.7 g | 0.99 g |
| 1 oz | 1 oz (28 g) | 24 calories | 0.93 g | 5.3 g | 0.38 g |
| 100 g | 3.5 oz (100 g) | 86 calories | 3.3 g | 18.7 g | 1.4 g |
Cups to grams
USDA weighs 1 cup of raw sweet yellow corn at 145 g. Smaller cup measures follow from it.
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 5.1 oz (145 g) | 125 calories |
| 3/4 cup | 3.8 oz (109 g) | 94 calories |
| 2/3 cup | 3.4 oz (97 g) | 83 calories |
| 1/2 cup | 2.6 oz (72 g) | 62 calories |
| 1/3 cup | 1.7 oz (48 g) | 42 calories |
| 1/4 cup | 1.3 oz (36 g) | 31 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 1/4 cup | 24 calories |
| 100 g (3.5 oz) | 2/3 cup | 86 calories |
| 1 lb (454 g) | 3 1/8 cups | 390 calories |
What 3.5 oz (100 g) of corn looks like
3.5 oz (100 g) of raw sweet yellow corn is 3.5 oz, or about 2/3 cup or 1 1/3 ears. It has 86 calories, 3.3 g protein, 18.7 g carbs and 1.4 g fat. One ear weighs 2.6 oz (73 g).
How much corn for 30 g of protein
There is 3.3 g of protein in 3.5 oz (100 g) of raw sweet yellow corn, so 30 g of protein would take 32.4 oz (917 g), about 6 1/3 cups, with 789 calories. It is not a practical way to reach a protein target.
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 sweet yellow corn | 1 cup: 5.1 oz (145 g) | 86 calories | 3.3 g |
| Cooked sweet yellow corn | 1 cup cut: 5.3 oz (149 g) | 96 calories | 3.4 g |
| Canned sweet yellow corn | 1 cup: 9 oz (256 g) | 61 calories | 1.9 g |
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-14)
- Raw sweet yellow corn: Corn, sweet, yellow, raw, FDC ID 169998 (SR Legacy, published 2019-04-01) · full nutrition facts
- Cooked sweet yellow corn: Corn, sweet, yellow, cooked, boiled, drained, without salt, FDC ID 169999 (SR Legacy, published 2019-04-01)
- Canned sweet yellow corn: Corn, sweet, yellow, canned, no salt added, solids and liquids (Includes foods for USDA's Food Distribution Program), FDC ID 169345 (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.