How many calories are in 1 corn?

November 26, 2025 •

3 min read

A medium ear of sweet corn has about 77 to 100 calories. This fiber-rich vegetable is a popular side dish, but the calorie count varies based on preparation methods.

Quick Summary

The calories in a single ear of corn change depending on its size and how it is prepared. A small ear has roughly 63 calories, while a large one may contain 123 calories without toppings. The main changes to calorie counts result from toppings such as butter.

Key Points

Size Matters: A medium ear has 77-100 calories, while a large one has up to 123 calories.
Toppings Increase Calories: Butter and oil significantly increase the calorie count.
Frozen and Canned Considerations: Canned corn may contain more sodium, and always check for added sugar or salt.
Cooking Method: Boiling, steaming, or grilling plain corn adds few calories.
Nutrient-Rich: Corn provides fiber, B vitamins, and antioxidants like lutein and zeaxanthin.
Precise Counting: Weighing kernels gives the most accurate calorie count.

Calorie Breakdown by Corn Size

The size of the corn on the cob is the most straightforward factor in determining the calorie count. Based on USDA data, the estimates for raw, sweet yellow corn are:

Small ear (5.5"-6.5" long): Approximately 63 calories.
Medium ear (6.75"-7.5" long): Approximately 88 calories.
Large ear (7.75"-9" long): Approximately 123 calories.

This shows that a larger ear has more kernels, and therefore, more carbohydrates and calories. Weighing the kernels after they have been removed from the cob is the most accurate way to track calories.

How Preparation Affects Calorie Count

The way corn is prepared impacts the total calories more than the cooking method. Boiling, steaming, or grilling corn without added fat does not add many calories. The change comes from what is added.

Plain Corn: A boiled or grilled ear of corn is a healthy option due to its low calorie count.
With Butter and Salt: Butter adds over 100 calories and a significant amount of saturated fat. A small amount of salt adds minimal calories but contributes to high sodium intake.
With Cheese or Mayonnaise: Corn is sometimes covered in high-calorie toppings like mayonnaise or cheese, turning a moderate-calorie vegetable into a calorie-dense side dish. Portion control is extremely important.

Fresh vs. Frozen vs. Canned Corn

The form of corn also presents slight nutritional variations. Frozen and canned corn are often processed at peak freshness, but additives can change their calorie and sodium content.

Fresh Corn: Generally the best option, offering the most natural flavor and texture without added preservatives.
Frozen Corn: A convenient choice, with nutrient levels often comparable to fresh. Choose versions with no added salt or sauces.
Canned Corn: Can contain higher levels of sodium and sometimes added sugar. Look for cans labeled “no salt added” or “no sugar added” and rinse before use to remove excess sodium.

Macronutrient and Micronutrient Profile

Besides calories, corn offers a mix of other nutrients. A standard serving (100g) of boiled yellow corn offers roughly 96 calories, along with:

Protein: ~3.4 grams
Fat: ~1.5 grams
Carbohydrates: ~21 grams
Fiber: ~2.4 grams
Vitamins: Rich in B vitamins, including folate and thiamin, and some Vitamin C.
Minerals: Good source of potassium, magnesium, and phosphorus.
Antioxidants: Contains lutein and zeaxanthin, important for eye health.

It is a good source of complex carbohydrates for energy and fiber for digestive health. The insoluble fiber in corn's outer skin (cellulose) is what passes through the body undigested, which is why corn kernels are sometimes visible in stool.

Comparing Corn Calorie Counts

Here is a comparison of different corn servings.


Corn Type	Preparation	Calories (approx.)	Notes
Small Ear	Plain, boiled	63 kcal	Low calorie, easy to track
Medium Ear	Plain, boiled	88 kcal	Standard serving size
Large Ear	Plain, boiled	123 kcal	Highest calorie per ear
Medium Ear	+ 1 Tbsp Butter	~190 kcal	Fat and calories increase significantly
1/2 Cup Kernels	Frozen, no additives	75 kcal	Convenient and low calorie
1/2 Cup Kernels	Canned, drained	67 kcal	Sodium can be a concern
3 Cups Popcorn	Air-popped, plain	95 kcal	High volume, low calorie snack

Conclusion: Making Smart Choices

When considering how many calories are in 1 corn, remember that the true number is not fixed. A plain, medium ear of corn is a low-fat, nutrient-dense food with a modest calorie count of around 88. However, any additions like butter, oil, or salt will increase this figure. By being mindful of serving size and choosing minimal, healthy toppings, it is possible to include corn in a balanced diet. For more in-depth nutritional information, authoritative sources like Johns Hopkins Medicine offer comprehensive details on the health benefits of corn.

Ultimately, corn can be a healthy and satisfying food choice. The key is in the preparation and understanding that chosen toppings have the greatest impact on the final calorie count. Enjoy your corn on the cob, but be aware of what is added to it.

Frequently Asked Questions

No, cooking methods like boiling, steaming, or grilling do not significantly increase the calories. The addition of toppings such as butter or oil is what contributes extra calories.

There is a very minimal difference in the calorie count between white and yellow corn. Any variation is more dependent on the size of the ear rather than its color.

A half cup of fresh, frozen, or canned sweet corn kernels typically contains between 77 and 100 calories, depending on the preparation and any additives.

Botanically, corn is a fruit and a grain. However, in culinary and nutritional contexts, it is commonly prepared and eaten as a starchy vegetable.

Corn can be part of a healthy diet for weight management. Its fiber content can help you feel full, which may prevent overeating. As with any food, moderation is key.

The human body can digest the starchy interior of the corn kernel, but it cannot break down its tough outer layer, which is made of cellulose. This undigested outer layer, which is insoluble fiber, is what you may see in your stool.

Frozen and canned corn can be just as healthy as fresh, often preserving nutrients well. However, it's best to choose options with no added salt or sugar to avoid excess sodium and calories.

To reduce calories, enjoy your corn without butter or heavy sauces. Consider healthier alternatives for flavor like a squeeze of lime juice, herbs, or a light sprinkle of salt.