One cup of cooked sweet corn gives ~140 calories, ~5 g protein, ~31 g carbs, and 3–4 g fiber with B vitamins plus lutein and zeaxanthin.
Light Portion
Standard Cup
With Butter
On The Cob
- Pick tight husks
- Steam short to keep vitamins
- Finish with herbs + lime
Fresh
Frozen Kernels
- Choose plain packs
- Sauté or microwave fast
- Stash for soups + bowls
Flash-frozen
Canned, No Salt
- Scan sodium lines
- Rinse to cut salt
- Skip syrup blends
Pantry-ready
U.S. Sweet Corn Nutrition Facts That Matter Day To Day
Sweet corn is a starchy vegetable with steady energy, modest protein, and handy fiber. One medium ear or a heaping half cup pairs well with lean meat or beans, and it blends easily with salads or stir-fries. The taste stays mild, so herbs, citrus, and a splash of olive oil carry the flavor without sending calories sky-high.
Here’s a compact table to ground serving sizes. Use it when you shop or plan sides. Values reflect plain kernels without butter or sauces.
| Serving | Calories | Carbs (g) |
|---|---|---|
| ½ cup cooked kernels | ~70 | ~15 |
| 1 cup cooked kernels | ~140 | ~31 |
| 1 medium ear (kernels) | ~100–110 | ~22–24 |
Calories, Carbs, Protein, And Fats In Corn
Per cup cooked, you’ll usually see about 140 calories, 31 grams of carbohydrate, near 5 grams of protein, and close to 2 grams of fat. Sugars sit around 9 grams from natural glucose and fructose, with starch filling the rest. That balance explains the soft, sweet taste and the steady lift you feel after a meal with corn.
Fiber lands near 3–4 grams per cup. That helps fullness and digestive rhythm. To nudge fiber higher with the same plate, toss kernels with black beans, edamame, or chopped greens. Harvard’s Nutrition Source explains how dietary fiber slows the rise of blood sugar and helps appetite control, so pairing corn with beans or greens is a smart move for steady energy (fiber overview).
Vitamins, Carotenoids, And Notable Minerals
Corn brings thiamin, niacin, vitamin B5, folate, and a helpful dose of magnesium and potassium. Yellow varieties stand out for carotenoids. Lutein and zeaxanthin concentrate in the kernel’s pigment; they sit in the macula of the eye and support visual performance under bright light. That’s why a bright yellow ear signals more than color on the plate.
You’ll also get small amounts of vitamin C. Heat can cut fragile vitamins, so short steaming or quick sautéing keeps more of what you bought. If you boil, keep the time short and repurpose the cooking liquid in soups so the nutrients that leach into the water show up in dinner, not the drain.
Raw, Steamed, Grilled, Or Boiled?
Cooking method nudges the nutrition dial. Short steaming often edges out boiling for water-soluble vitamins. Microwaving with a splash of water works well too. Grilling brings smoky flavor with little change to calories. These trends line up with broader research on nutrient retention with gentle heat and low contact with water.
Boiling softens kernels fast, which some folks prefer for texture. If that’s the pick, keep the time brief and add kernels near the end of a soup so they warm through without a long simmer.
Glycemic Picture And Serving Ideas
Across studies, sweet corn generally falls in a low-to-moderate glycemic index range, and a cup-size portion lands in the low glycemic load category. The combo of starch with fiber and a bit of protein helps keep the curve smooth for many eaters.
Mix kernels with beans, chopped peppers, and a squeeze of lime for a fast side that leans toward slow-release carbs. For a protein-tilted bowl, try corn over quinoa or farro with shredded chicken, scallions, and a spoon of salsa. For a plant-only version, go with edamame, cherry tomatoes, and a light avocado dressing. Salt lightly and lean on bright herbs to keep sodium in check.
Label Reading For Frozen And Canned Corn
Frozen kernels often carry a clean ingredient line and steady nutrition. Choose packs without sauces. For canned, scan sodium; “no salt added” or “low sodium” makes seasoning easier to control. Rinsing canned kernels trims sodium further. If a label lists sugar or syrup, pick a plain version nearby on the shelf.
How Corn Fits Into A Balanced Plate
Treat corn as your starch side. On days you serve it, dial down rice or bread to keep total carbs steady. Pair with lean protein and a non-starchy veg. A simple layout works at dinner: half the plate produce, a quarter starch, a quarter protein. That setup suits family meals and lunch bowls.
When you want more color and phytonutrients, choose deep yellow ears and add leafy greens. When you want a lighter carb day, trim the portion to a heaping half cup and add extra non-starchy veg like zucchini ribbons or a cucumber salad.
Micronutrient Highlights From A Cup Of Kernels
Numbers below reflect common database values for plain yellow kernels. The right column gives a quick payoff line you can share at the table.
| Nutrient | Per 1 cup cooked | Why It Helps |
|---|---|---|
| Thiamin (B1) | ~0.3 mg | Energy metabolism for active cells |
| Folate (DFE) | ~60–70 µg | DNA and red blood cell formation |
| Magnesium | ~50 mg | Muscle and nerve function |
| Potassium | ~390 mg | Fluid balance and steady heartbeat |
| Vitamin C | ~10 mg | Antioxidant with collagen support |
| Lutein + Zeaxanthin | ~900–1000 µg | Macular pigment that aids glare recovery |
Portions, Goals, And Simple Swaps
If you track calories, start with one cup cooked as the anchor. On active days, two modest servings can fit into a balanced plate. If you’re cutting back on energy intake, slide to a generous half cup and build volume with diced peppers, onions, or shredded cabbage. These swaps lift fiber for few calories and add crunch.
Want a just-sweet side with less butter? Warm kernels in a pan with a teaspoon of olive oil, then finish with lemon and fresh herbs. The taste pops without a heavy sauce. If you crave creaminess, stir in a spoon of Greek yogurt off heat for a light, tangy finish.
Buying And Storing Tips That Keep Nutrition Intact
Fresh ears shine when cooked soon after harvest. Look for tight husks, sticky silk, and plump tips. Store in the fridge, husks on, and cook within two days. Frozen packs are a handy stand-in; they’re flash-frozen near harvest, so texture and nutrients hold up well. Keep a bag for soups, taco fillings, and grain bowls.
Leftovers keep three to four days in a sealed container. For texture, reheat gently with a splash of water in a covered pan or the microwave. That way kernels stay juicy, not chewy.
Where The Numbers Come From
Nutrition values for raw yellow kernels and common cooked servings come from laboratory databases that compile measurements across samples. For quick reference, see USDA-based sweet corn values. For fiber basics and balanced-plate ideas, see the Harvard Nutrition Source page on fiber. For glycemic ranges and definitions used in research, the University of Sydney GI site lists the cutoff points for low, medium, and high GI.
Quick Ways To Use Corn Without Blowing The Budget
Skillet Street-Corn Style
Toast kernels in a dry pan, then add a teaspoon of oil, chopped scallion, jalapeño, and a dusting of chili powder. Finish with lime. Add feta or cotija only if it fits your plan for the day.
Soup, Stew, And Chili Add-Ins
Fold thawed kernels in near the end for texture and light sweetness. Toss a handful into tomato soup, tortilla soup, or veggie chili. Short cook time keeps the pop.
Grain Salad Builder
Toss cooked farro or quinoa with kernels, diced peppers, chopped herbs, lemon, and a spoon of olive oil. Chill for lunch boxes or picnic bowls.
Bottom Line For Everyday Eating
Yellow kernels bring reliable energy, mellow sweetness, and helpful fiber in portions that are easy to measure. Pick the cook method that fits your kitchen, keep sauces light, and pair corn with lean protein and colorful veg. With those moves, this staple slides into a week’s menu without fuss.