Calories in Corn: Nutrition Facts by Serving Size

Corn is one of the most widely consumed grains in the world, though it is commonly eaten as a vegetable. It is a good source of energy-providing carbohydrates, fiber, B vitamins, and antioxidants like lutein and zeaxanthin that support eye health. Here is a full breakdown of corn nutrition by serving size.

Calories by serving size:

Corn also provides thiamine (vitamin B1), folate, magnesium, and phosphorus. Yellow corn is particularly rich in carotenoid antioxidants that give it its bright color.

Frequently Asked Questions (FAQ)

How many calories are in an ear of corn?

One medium ear of corn (about 90 grams of kernels) contains approximately 77 calories. Most of those calories come from carbohydrates, with about 17 grams of carbs, 3 grams of protein, and 2.4 grams of fiber. A large ear has about 102 calories.

Is corn good for weight loss?

Corn can be part of a weight-loss diet when eaten in reasonable portions. While it is higher in calories and carbohydrates than most vegetables, it provides good fiber and protein that help promote satiety. A single medium ear at 77 calories is still a moderate-calorie food. The key is to avoid adding excessive butter or other high-calorie toppings.

Is corn a vegetable or a grain?

Corn is botanically a cereal grain, but fresh sweet corn eaten on the cob or as kernels is nutritionally classified and consumed as a vegetable. When dried and processed into cornmeal, flour, or popcorn, it is treated as a whole grain. In either form, corn provides valuable nutrients including fiber, B vitamins, and antioxidants.

Does corn have a high glycemic index?

Sweet corn has a moderate glycemic index of about 52, which is lower than many people expect. The fiber content helps slow the absorption of its natural sugars. Corn is considered a medium-GI food, comparable to brown rice. Eating it as part of a balanced meal with protein and fat further reduces its glycemic impact.

Is corn a good source of antioxidants?

Yes. Yellow corn is rich in carotenoid antioxidants, particularly lutein and zeaxanthin, which are important for eye health and may help reduce the risk of age-related macular degeneration. Corn also contains ferulic acid and other phenolic compounds. Interestingly, cooking corn can increase the bioavailability of some of these antioxidants.