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A whole raw onion with papery golden-brown skin, a rounded bulb shape, and a small dried stem at the top, shown beside a cut half revealing tightly layered white and pale-purple rings.
●Low GI
★Natural

Raw onion Calories

Low calorie, contains vitamin C

CALORIES

40kcal

GI

10low

POTASSIUM

146mg

FIBER

1.7g

Raw onion Nutrition Facts

Selected: 100 g

40

KCAL / 100G

Carbs

9.3g

· 88%

Protein

1.1g

· 10%

Fat

0.1g

· 2%

Fiber

1.7g

Raw onion Vitamins & Minerals

Vitamins

Vitamin C

7.4mg · 8% DV

B6

0.12mg · 7% DV

Folate

19µg · 5% DV

B1

0.05mg · 4% DV

Minerals

Phosphorus

29mg · 4% DV

Potassium ⭐

146mg · 4% DV

Calcium

23mg · 2% DV

Magnesium

10mg · 2% DV

Raw onion Glycemic Index

GLYCEMIC INDEX

10
Low
0 Low5570100

GLYCEMIC LOAD

1
Low

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

Is Raw onion Processed?

NOVA 1

Unprocessed

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 Raw 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 Raw 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

✓ Suitable

Low FODMAP

— Not suitable

Raw onion Fat Profile

SATURATED

0.04g

MONOUNSATURATED

0.01g

POLYUNSATURATED

0.02g

Foods Similar to Raw onion

🍅

Tomato

18 kcal

🥗

Mixed Green Salad

18 kcal

🫑

Red Pepper

31 kcal

🥄

Boiled Beetroot

44 kcal

🫑

Green pepper

20 kcal

🥗

Potato Salad

110 kcal

🥗

Arugula

25 kcal

🥕🥦🍆

Oven-Roasted Mixed Vegetables

65 kcal

Raw onion — Frequently Asked Questions

How many calories are in raw onion?

Raw onion contains 40 calories per 100 grams. It is a relatively low-calorie vegetable option.

How many carbs are in raw onion?

Raw onion provides 9.3 grams of carbohydrates per 100 grams. Its glycemic index is 10.

Does raw onion contain protein?

Yes. Raw onion contains 1.1 grams of protein per 100 grams, which is modest compared with its carbohydrate content.

How much fiber is in raw onion?

There are 1.7 grams of fiber in 100 grams of raw onion. This can contribute to the fiber content of a meal.

Is raw onion good for a weight-loss diet?

With 40 calories per 100 grams, raw onion can fit into calorie-conscious eating plans. Its 9.3 grams of carbohydrates per 100 grams should still be included in the overall meal plan.

Is raw onion keto-friendly?

Raw onion is listed as compatible with keto eating. Because it has 9.3 grams of carbohydrates per 100 grams, portion size should fit your daily carbohydrate target.

Does raw onion have a high glycemic index?

No. Raw onion has a glycemic index of 10, which is low.

Is raw onion suitable for vegan and vegetarian diets?

Yes, raw onion is compatible with vegan and vegetarian diets. It also fits pescatarian, paleo, Mediterranean, flexitarian, and gluten-free eating patterns.

How much fat is in raw onion?

Raw onion is very low in fat, with 0.1 grams per 100 grams. Its calories come primarily from carbohydrates rather than fat.

Is raw onion a processed food?

No. Raw onion is classified as an unprocessed food. Eating it raw maintains its unprocessed status.

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Nutrition data compiled from USDA FoodData Central and scientific sources.