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Finely chopped onion forms a loose pile of small, irregular white pieces with faint translucent edges and a few pale green sections.
●Low GI

Chopped onion Calories

Chopped onion adds flavor and nutrients to dishes.

In season: Spring · Summer · Autumn · Winter

CALORIES · 100 G

40kcal

GI

15low

POTASSIUM · 100 G

146mg

FIBER · 100 G

1.7g

Quick answer

½ cup (medium) of Chopped onion (60 g) has 24 calories. That works out to 40 calories per 100 g. It contains 5.6 g of carbs, 0.7 g of protein, 0.1 g of fat and 1 g of fiber. Its 4.4 mg of Vitamin C covers 5% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.

Chopped onion Nutrition Facts

Selected: ½ cup (medium) · 60 g

24

KCAL / 60G

Carbs

5.6g

· 2% DV

Protein

0.7g

· 1% DV

Fat

0.1g

· 0% DV

Fiber

1g

· 4% DV

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

Calories come from: Carbs 86% · Protein 11% · Fat 3%

Chopped onion nutrition facts table · ½ cup (medium) (60 g)

NutrientAmount% DV
Calories24 kcal
Total fat0.1 g0%
Saturated fat0.01 g0%
Trans fat0 g
Sodium2.4 mg0%
Total carbohydrate5.6 g2%
Fiber1 g4%
Protein0.7 g1%

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 ½ Cup of Chopped onion?

ServingAmountCalories
½ cup (medium)60 g24 kcal
1 g1 g0 kcal
1 tablespoon (chopped)10 g4 kcal
2 tablespoon (chopped)20 g8 kcal
0.25 cup (small)30 g12 kcal
1 serving (medium)50 g20 kcal
1 piece (medium)80 g32 kcal
100 g100 g40 kcal
1 cup (large)120 g48 kcal
1 piece (large)120 g48 kcal

Calculated from 40 calories per 100 g.

Frequently Asked Questions About Chopped onion

How do you chop an onion without crying?

To reduce tears while chopping an onion, chill it first and use a sharp knife to make clean cuts. Cutting near a running extractor fan or open window can also carry away the irritating compounds before they reach your eyes.

How long does chopped onion last in the fridge?

Chopped onion usually keeps for 3–5 days in the refrigerator when stored in a clean, airtight container. Keep it away from raw meat and fish, and discard it if it develops mold, a slimy texture, or an off smell.

Can you freeze chopped onion?

Yes, chopped onion freezes well for cooked dishes. Spread the pieces on a tray to freeze separately, then transfer them to an airtight freezer bag. Frozen onion softens after thawing, so use it in soups, sauces, or sautés rather than raw salads.

Should you wash chopped onion before using it?

No, you generally do not need to wash chopped onion. Peel the whole onion and chop it with a clean knife on a clean board; rinse the outside of the unpeeled onion first if it has visible dirt.

Can you eat chopped onion raw?

Yes, chopped onion can be eaten raw in salads, salsas, and sandwiches. If its sharp flavor is too strong, soak it briefly in cold water and drain it; cooking makes the flavor milder and sweeter.

When should you add chopped onion to a pan?

Add chopped onion to the pan after the oil is warm, then cook it over medium heat until softened. For soups, sauces, and many skillet dishes, cooking the onion before the other ingredients builds a more rounded flavor.

Why does chopped onion turn pink or blue?

Chopped onion can turn pink or bluish when its natural pigments react with acidic ingredients or particular storage conditions. A color change alone does not necessarily mean it is spoiled, but discard it if it is slimy, moldy, or smells unpleasant.

How do you keep chopped onion from smelling up the fridge?

Store chopped onion in a clean, tightly sealed container to keep its odor from spreading through the refrigerator. A glass container with a secure lid works well; keep it chilled rather than leaving it on the counter.

Can you cook frozen chopped onion without thawing it?

Yes, you can add frozen chopped onion straight to a hot pan or simmering dish. It releases extra moisture as it thaws, so let that liquid cook off before expecting the onion to brown.

Is chopped onion toxic to dogs?

Yes, chopped onion is toxic to dogs whether it is raw, cooked, or dried. Onion can damage a dog's red blood cells, so contact a veterinarian promptly if your dog eats it rather than waiting for symptoms.

Chopped onion Vitamins & Minerals

Vitamins

Vitamin C

4.44mg · 5% DV

B6

0.07mg · 4% DV

Folate

11.4µg · 3% DV

B1

0.03mg · 3% DV

Minerals

Manganese

0.08mg · 3% DV

Potassium ⭐

88mg · 3% DV

Copper

0.02mg · 2% DV

Phosphorus

17mg · 2% DV

Sodium

2.4mg · 0% DV

Chopped onion 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 Chopped onion

To burn the 24 calories in ½ cup (medium) (60 g):

🚶

6min

Walking (5 km/h)

🏃

2min

Running (8 km/h)

🚴

3min

Cycling

🏊

3min

Swimming

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

What is Chopped onion?

Chopped onion is fresh onion cut into small pieces, ready to add to a dish or serve raw. It is a kitchen staple across many cuisines: cooks use it as a base for soups, sauces, stews and stir-fries, while raw onion adds bite to salads, sandwiches and relishes.

Its flavour is sharp and juicy when raw, then mellows and turns gently sweet as it cooks. You can scatter it over tacos or grain bowls, fold it into an omelette, or soften it with other aromatics at the start of a recipe. At 40 calories per 100 g, it brings plenty of savoury flavour for relatively little energy. For a lighter dish, use it raw or soften it in a non-stick pan with just a little oil.

How Nutritious Is Chopped onion?

Nutrient density

High

60/ 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

46/ 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 Chopped onion 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 Chopped onion Contain Allergens?

No known major allergens

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

Which Diets Is Chopped onion Good For?

Vegan

✓ Suitable

Vegetarian

✓ Suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

— Not suitable

Low FODMAP

— Not suitable

Chopped onion Fat Profile

SATURATED

0.01g

MONOUNSATURATED

0.01g

POLYUNSATURATED

0.02g

Compare Chopped onion

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Nutrition data compiled from USDA FoodData Central and scientific sources.