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A golden-yellow omelet with visible small pieces of red onion, showing purple-red edges and pale centers, sits on a plate with a softly set, slightly folded surface.
●Low GI

Red onion omelet Calories

Source of protein and vitamin B12

In season: Spring · Summer · Autumn · Winter

CALORIES · 100 G

154kcal

GI

15low

POTASSIUM · 100 G

155mg

FIBER · 100 G

0.6g

Quick answer

1 piece (medium) of Red onion omelet (120 g) has 185 calories. That works out to 154 calories per 100 g. It contains 4 g of carbs, 13.8 g of protein, 12.8 g of fat and 0.7 g of fiber. Its 19.2 µg of Biotin covers 64% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.

Red onion omelet Nutrition Facts

Selected: 1 piece (medium) · 120 g

185

KCAL / 120G

Carbs

4g

· 1% DV

Protein

13.8g

· 28% DV

Fat

12.8g

· 16% DV

Fiber

0.7g

· 3% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 9% · Protein 30% · Fat 61%

Red onion omelet nutrition facts table · 1 piece (medium) (120 g)

NutrientAmount% DV
Calories185 kcal
Total fat12.8 g16%
Saturated fat3.96 g20%
Trans fat0.06 g
Sodium158 mg7%
Total carbohydrate4 g1%
Fiber0.7 g3%
Protein13.8 g28%

Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.

Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.

Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.

Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.

Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.

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How Many Calories in 1 Medium Red onion omelet?

ServingAmountCalories
1 piece (medium)120 g185 kcal
1 serving (quarter)30 g46 kcal
1 slice (thin)40 g62 kcal
1 serving (half)60 g92 kcal
1 piece (small)75 g116 kcal
100 g100 g154 kcal
1 piece (large)180 g277 kcal
1 piece (extra large)240 g370 kcal
1 serving (double)240 g370 kcal

Calculated from 154 calories per 100 g.

Frequently Asked Questions About Red onion omelet

How do you make a red onion omelet?

To make a red onion omelet, finely slice the onion and sauté it until soft, then add beaten eggs and cook over low heat. Take the omelet off the heat once the eggs are just set so they stay tender.

Should you cook the red onion before adding eggs to a red onion omelet?

Yes, sauté the red onion first for a milder, softer result. Adding it raw can leave the onion sharp and crunchy by the time the eggs are cooked; soften it in the pan before pouring in the eggs.

What can you add to a red onion omelet?

Cheese, fresh herbs, black pepper, and chopped bell pepper all work well in a red onion omelet. Add cheese near the end so it melts, and season carefully if the cheese is already salty.

How do you stop a red onion omelet from getting watery?

Cook the red onion until its released moisture has evaporated before adding the eggs. A crowded pan or very high heat can also make a red onion omelet cook unevenly, so use a suitably sized pan and moderate heat.

What cheese goes best in a red onion omelet?

Feta and cheddar both pair well with the sweetness of cooked red onion in an omelet. Crumble or grate the cheese over the eggs as they begin to set, then fold the omelet so the cheese warms without overcooking the eggs.

How do you make a fluffy red onion omelet?

For a fluffy red onion omelet, beat the eggs until the whites and yolks are fully combined, then cook them gently in a warm pan. Avoid pressing the omelet down; covering the pan briefly helps the top set without drying the base.

What should you serve with a red onion omelet?

Serve a red onion omelet with toast, a green salad, or sliced tomatoes for a simple meal. Fresh herbs add brightness, while potatoes or roasted vegetables make it more substantial without competing with the onion.

Can you bake a red onion omelet instead of cooking it in a pan?

Yes, you can bake a red onion omelet in an oven-safe dish. Soften the onion in a pan first, mix it with the beaten eggs and any additions, then bake until the centre is set; avoid leaving it in the oven too long.

How should you store leftover red onion omelet?

Refrigerate leftover red onion omelet in a covered container once it has cooled, rather than leaving it out for an extended period. Use it soon for the best texture, and discard it if its smell or appearance changes.

Can you reheat a red onion omelet the next day?

Yes, reheat a red onion omelet gently in a covered pan over low heat or in short bursts in the microwave. Gentle heating helps prevent the eggs from turning rubbery; reheat only the portion you plan to eat.

Red onion omelet Vitamins & Minerals

Vitamins

Biotin

19.2µg · 64% DV

B12

1.26µg · 53% DV

B5

1.5mg · 30% DV

B2

0.38mg · 29% DV

Minerals

Selenium

30µg · 55% DV

Phosphorus

216mg · 31% DV

Iodine

34µg · 23% DV

Zinc

1.38mg · 13% DV

Sodium

158mg · 7% DV

Potassium ⭐

186mg · 5% DV

Red onion omelet Glycemic Index

GLYCEMIC INDEX

15
Low
0 Low5570100

GLYCEMIC LOAD

0.6
Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Red onion omelet

To burn the 185 calories in 1 piece (medium) (120 g):

🚶

46min

Walking (5 km/h)

🏃

19min

Running (8 km/h)

🚴

25min

Cycling

🏊

22min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

What is Red onion omelet?

A red onion omelet is made by cooking beaten eggs with sliced or chopped red onion in a pan. The onion may be softened first for a sweeter, tender bite, or left slightly crisp for more contrast. It is a simple home-style variation on the omelet, easy to adapt with herbs or a little cheese.

Serve it warm for breakfast or brunch with toast, or pair it with a salad for a light lunch. Eggs make it a source of protein and vitamin B12, while the onion adds flavour without making the dish heavy. For a lighter version, soften the onion with just a little oil and add fresh greens on the side.

How Nutritious Is Red onion omelet?

Nutrient density

High

65/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

45/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Is Red onion omelet Processed?

NOVA 2

Minimally Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Red onion omelet Contain Allergens?

Contains these allergens:

Gluten free
Dairy free
Eggs yes
Peanuts free
Tree nuts free
Fish free
Soy free
Sesame free

Which Diets Is Red onion omelet Good For?

Vegan

— Not suitable

Vegetarian

✓ Suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Red onion omelet Fat Profile

SATURATED

3.96g

MONOUNSATURATED

5.04g

POLYUNSATURATED

2.16g

⚖️

Omega 6:3 ratio 21.8:1

Above the ideal 4:1 (21.8:1).

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Nutrition data compiled from USDA FoodData Central and scientific sources.