Calories in sweet corn.
86 kcal per 100 g.
Corn is a grain, not a green: at 86 kcal per 100 g raw it is closer to potato than to broccoli, and one large ear is about 125 kcal before butter.
Corn, sweet, yellow, raw · SR Legacy (2018-04) · USDA FDC 169998
Nutrition for your portion
| Nutrient | Per 100 g | 100 g |
|---|---|---|
| Energy | 86 kcal | 86 kcal |
| Protein | 3.27 g | 3.27 g |
| Carbohydrates | 18.7 g | 18.7 g |
| Fat | 1.35 g | 1.35 g |
| Fibre | 2 g | 2 g |
| Sugars | 6.26 g | 6.26 g |
| Saturated fat | 0.33 g | 0.33 g |
| Sodium | 15 mg | 15 mg |
| Salt (calculated from sodium) | 0.04 g | 0.04 g |
| Vitamin A (RAE) | 9 ug | 9 ug |
| Vitamin D (D2 + D3) | 0 ug | 0 ug |
| Vitamin E (alpha-tocopherol) | 0.07 mg | 0.07 mg |
| Vitamin K (phylloquinone) | 0.3 ug | 0.3 ug |
| Vitamin C | 6.8 mg | 6.8 mg |
| Thiamin | 0.16 mg | 0.16 mg |
| Riboflavin | 0.06 mg | 0.06 mg |
| Niacin | 1.77 mg | 1.77 mg |
| Vitamin B6 | 0.09 mg | 0.09 mg |
| Folate, total | 42 ug | 42 ug |
| Vitamin B12 | 0 ug | 0 ug |
| Potassium | 270 mg | 270 mg |
| Calcium | 2 mg | 2 mg |
| Phosphorus | 89 mg | 89 mg |
| Magnesium | 37 mg | 37 mg |
| Iron | 0.52 mg | 0.52 mg |
| Zinc | 0.46 mg | 0.46 mg |
| Selenium | 0.6 ug | 0.6 ug |
| Iodine | Unknown | Unknown |
| Copper | 0.05 mg | 0.05 mg |
Energy comes from USDA nutrient 1008. Salt is calculated as sodium × 2.5, with unit conversion to grams. It is not a separately measured salt value.
Preparation
Sweet corn is 86 kcal per 100 g, more than double anything else in this family, because it is a grain being eaten as a vegetable: 18.7 g of carbohydrate per 100 g. Boiling or grilling changes nothing. Butter changes everything — a tablespoon on a corn cob is 102 kcal against the cob's own 123, very nearly doubling it.
Logging this food
USDA gives the yields, which is what matters for a food eaten off a cob: a large ear yields 143 g and 123 kcal, a medium 102 g and 88, a small 73 g and 63. A cup of kernels is 145 g and 125. Tinned and frozen corn are close to this row; creamed corn is not, and neither is anything in a syrup.
Swaps and alternatives
Green peas are 81 kcal per 100 g, the only other starchy vegetable here, and everything else in the family is between 15 and 41. If corn is standing in for a starch, that is the right way to log it — against rice at 130 per 100 g cooked, corn is the lighter option and comes with fibre.