How many calories are in a long corn?

November 4, 2025 •

4 min read

According to USDA data, a large ear of sweet yellow corn (7-3/4" to 9" long) contains approximately 123 calories. The exact number of calories in a long corn, however, can vary based on its size, variety, and how it is prepared, especially considering added toppings like butter.

Quick Summary

A large ear of corn has around 123 calories, but the total can fluctuate based on its specific size and the addition of toppings. A medium ear is closer to 88 calories, while a small one is about 63. Calorie counts remain similar for boiling, grilling, or steaming before adding butter or oil.

Key Points

Long Corn Calories: A large ear of sweet yellow corn (7-3/4" to 9" long) contains approximately 123 calories based on USDA data.
Size Variations: The caloric content changes with size, ranging from about 63 calories for a small ear to 88 for a medium one.
Cooking Method Impact: The cooking method itself (boiling, grilling, steaming) adds no significant calories; additional calories primarily come from toppings.
Toppings Increase Calories: High-calorie additions like butter can drastically increase the total intake, with a single tablespoon adding over 100 calories.
Nutritional Value: Corn is a good source of fiber, vitamins (B, C), and minerals (potassium, magnesium), and contains antioxidants that support eye health.
Healthier Alternatives: Consider using herbs, spices, or a squeeze of lime instead of butter to enhance flavor without adding excessive calories.

Decoding the Caloric Content of Corn

Understanding the calories in a long corn is simpler than it seems, primarily hinging on size and preparation. A 'long' or large corn on the cob provides a filling and nutritious snack with a relatively low base calorie count, which increases with toppings. Sweet corn is a good source of fiber and essential nutrients, and its natural sweetness makes it a popular vegetable.

Size Matters: Calorie Breakdown by Corn Ear

One of the most important factors influencing the total calorie count of a corn cob is its size. The USDA provides reliable data that categorizes corn by length, giving a clear picture of how calories scale with size. This information is crucial for those tracking their intake accurately.

Small Ear (5-1/2" to 6-1/2" long): A smaller cob contains about 63 calories, making it a very light option.
Medium Ear (6-3/4" to 7-1/2" long): The calorie count for a medium-sized ear is roughly 88 calories. This is the figure often cited for an average serving.
Large Ear (7-3/4" to 9" long): A larger or 'long' ear of corn, the focus of this article, contains approximately 123 calories.

These figures represent raw, sweet corn, without any added ingredients. It's important to start with this baseline to truly understand your calorie intake.

How Preparation Affects Calorie Count

How you cook your corn plays a role in the final calorie count, especially when considering added ingredients. The cooking method itself—boiling, grilling, or steaming—adds no significant calories, but toppings can drastically increase the total.

Boiling: A simple and straightforward method that keeps the base calorie count low. Just be mindful of what you add after it's cooked.
Grilling: Creates a smoky flavor without adding extra calories. For a healthier option, use a light spray of olive oil instead of butter.
Steaming: A gentle cooking method that preserves nutrients and keeps calories minimal. Great for maintaining the corn's natural flavor.
Added Fats: A single tablespoon of butter can add over 100 calories. Similarly, oils or creamy sauces can significantly increase the total caloric load. For a healthier alternative, try seasoning with spices like paprika, chili powder, or a sprinkle of nutritional yeast for a cheesy flavor.

Comparative Nutritional Profile of Corn Sizes

Here is a comparison table outlining the nutritional content of different sizes of corn on the cob, based on USDA data for raw, sweet yellow corn.


Nutrient	Small Ear (63 kcal)	Medium Ear (88 kcal)	Large Ear (123 kcal)
Carbohydrates	~11 g	~17 g	~27 g
Protein	~2.2 g	~3.3 g	~4.7 g
Fat	~0.9 g	~1.4 g	~1.9 g
Fiber	~1.9 g	~2.6 g	~3.8 g

These figures illustrate that while a larger ear has more calories, it also offers a greater amount of fiber, protein, and other nutrients, making it more satiating. The caloric difference per gram is minimal, but the total for a large ear is substantially higher than for a small one.

Beyond Calories: The Health Benefits of Corn

While counting calories is important, it's just one piece of the puzzle. Corn offers several health benefits that make it a valuable addition to a balanced diet.

Rich in Fiber: Corn contains dietary fiber, which is important for digestive health and helps promote feelings of fullness.
Contains Lutein and Zeaxanthin: These two carotenoids are powerful antioxidants that are particularly beneficial for eye health, helping to protect against macular degeneration.
Good Source of Vitamins: Corn provides essential vitamins such as B vitamins (thiamin, niacin) and Vitamin C, which support everything from energy metabolism to immune function.
Heart-Healthy Minerals: It contains potassium and magnesium, which contribute to heart health and help regulate blood pressure.

Healthy Topping Alternatives

If you want to enhance the flavor of your corn without piling on extra calories, consider these healthier alternatives:

Herbs and Spices: Sprinkle with chili powder, smoked paprika, black pepper, or fresh herbs like cilantro or parsley.
Citrus and Cheese: A squeeze of fresh lime juice and a dusting of cotija cheese offers a bright, savory kick with fewer calories than butter.
Healthy Fats: Instead of butter, use a very small amount of olive oil and a dash of sea salt.
Salsa or Hot Sauce: Add a spoonful of fresh salsa or your favorite hot sauce for a spicy, low-calorie boost of flavor.

Conclusion

To determine how many calories are in a long corn, the answer lies in its size, with a typical large ear containing around 123 calories. This figure, however, is merely a starting point. The real variation in caloric intake comes from the addition of toppings. By opting for healthier seasonings like herbs and spices, you can enjoy all the nutritional benefits of this fiber-rich vegetable while keeping your calorie count in check.

For more nutritional information and healthy recipe ideas, check out the resources provided by the National Corn Growers Association or credible health platforms like Verywell Fit. Understanding the fundamentals of corn's nutritional profile allows you to make informed decisions for a balanced and healthy diet.

This article provides general nutritional information and is not a substitute for professional medical advice.

Frequently Asked Questions

No, the cooking method itself does not significantly affect the calorie count of the corn. The primary change in calories comes from any added ingredients like butter or oil.

To reduce calories, skip the butter and high-fat toppings. Instead, use spices like chili powder, smoked paprika, or fresh herbs for flavor. A squeeze of lime juice is another great, low-calorie option.

While a large ear of corn has about 123 calories, a single cup of corn kernels (plain) contains approximately 125 calories. The difference is minimal, but the total intake depends on the specific volume consumed.

Botanically, corn is a fruit. However, nutritionally, it is considered both a vegetable and a grain. Whole kernel corn (like corn on the cob) is typically grouped with vegetables, while processed corn (like cornmeal or popcorn) is considered a grain.

The variation in sweetness between corn varieties has a minimal impact on the overall calorie count. The caloric content is more dependent on the size and moisture content of the cob.

Yes, corn can be part of a weight loss diet. It is low in fat, high in fiber, and provides a feeling of fullness. The key is to be mindful of portion sizes and to use healthy, low-calorie toppings.

In addition to calories, a long corn is a good source of fiber, protein, and healthy micronutrients, including B vitamins, vitamin C, potassium, and antioxidants like lutein and zeaxanthin.