How many calories are in Whole Onion?

100 g of Whole Onion has 29 kcal. Serving, 122 g (122 g): about 35 kcal.

How much protein is in Whole Onion?

Whole Onion contains 0.82 g of protein per 100 g (2% of the 50 g Daily Value), or 1 g in serving, 122 g (122 g). About 11% of its calories come from protein. Compared with other vegetables, that is in the lowest quarter (median 2.6 g).

How many carbs are in Whole Onion?

Whole Onion has 6.6 g of total carbohydrates per 100 g, including 1.6 g of fiber and 4.1 g of sugars.

How much fat is in Whole Onion?

Whole Onion contains 0 g of fat per 100 g, of which 0 g is saturated (0% of the Daily Value).

How much sodium is in Whole Onion?

100 g contains 344 mg of sodium, 15% of the 2,300 mg Daily Value.

Where does this nutrition data come from?

From USDA FoodData Central: Branded Foods, record dated February 24, 2025. FoodFactly last checked it on November 6, 2026. Each value above shows whether it was measured, calculated or taken from a label.

Whole Onion

Packaged product Vegetables Market Basket

Whole Onion contains 29 kcal per 100 g. A serving, 122 g (122 g) provides about 35 kcal.

Roughly 89% of its calories come from carbohydrates, with 11% from protein and 0% from fat (estimated with general energy factors).

That is less energy than the typical item in vegetables on FoodFactly, where the median is 144 kcal per 100 g across 29,937 products.

The values are label data submitted by the manufacturer to USDA FoodData Central.

29kcal per 100 g

0.82 gprotein

6.6 gcarbohydrates

0 gfat

35kcal in serving, 122 g (122 g)

Nutrition facts

Amount

Nutrition facts for the selected amount
Nutrient	Amount per 100 g	% DV
Calories L	29 kcal
Total fat L	0 g	0%
Saturated fat L	0 g	0%
Trans fat L	0 g
Cholesterol L	0 mg	0%
Sodium L	344 mg	15%
Total carbohydrates L	6.6 g	2%
Dietary fiber L	1.6 g	6%
Total sugars L	4.1 g
Protein L	0.82 g	2%
Vitamin A L	0 µg	0%
Vitamin C L	0 mg	0%
Vitamin D L	0 µg	0%
Vitamin E L	0 mg	0%
Vitamin K L	0 µg	0%
Thiamin (B1) L	0 mg	0%
Riboflavin (B2) L	0 mg	0%
Niacin (B3) L	0 mg	0%
Pantothenic acid (B5) L	0 mg	0%
Vitamin B6 L	0 mg	0%
Folate (B9) L	0 µg	0%
Vitamin B12 L	0 µg	0%
Calcium L	0 mg	0%
Iron L	0 mg	0%
Magnesium L	0 mg	0%
Phosphorus L	0 mg	0%
Potassium L	0 mg	0%
Zinc L	0 mg	0%
Copper L	0 mg	0%
Manganese L	0 mg	0%
Selenium L	0 µg	0%
Iodine L	0 µg	0%
Fluoride L	0 µg

% DV: percent of the FDA Daily Value for adults (reference amounts). Letters show how each value was obtained: M measured, C calculated, L label, Z assumed zero, I imputed. Vitamins and minerals not listed were not reported by the source.

Nutritional breakdown

Protein 11%
Carbohydrates 89%

Approximate share of calories, using general energy factors (4 kcal/g protein and carbohydrate, 9 kcal/g fat, 7 kcal/g alcohol).

Vitamins and minerals, % Daily Value per 100 g

Nutritional insights

Protein0.82 gin the lowest quarter of vegetables (median 2.6 g)
Fiber1.6 gbelow the median for vegetables (median 2 g)
Sugars4.1 gabove the median for vegetables (median 2.1 g)
Fat0 gin the lowest quarter of vegetables (median 5.7 g)
Saturated fat0 gin the lowest quarter of vegetables (median 1.2 g)
Sodium344 mgabove the median for vegetables (median 339 mg)
Protein per 100 kcal2.8 gprotein density, useful for comparing foods with different calorie levels

Full nutrient profile

Fats and cholesterol (3)

Monounsaturated fat L	0 g
Polyunsaturated fat L	0 g
Omega-3 fatty acids L	0 g

Other components (3)

Alcohol L	0 g
Caffeine L	0 mg
Vitamin A, IU L	0 IU

Values by source

More than one dataset describes this food. FoodFactly keeps each source's values separately instead of blending them. The headline values above come from USDA FoodData Central: Branded Foods.

Per 100 g	Open Food Facts	USDA Branded
Calories	24.2 kcal	29 kcal
Protein	0.67 g	0.82 g
Carbohydrates	5.4 g	6.6 g
Fat	0 g	0 g
Fiber	1.3 g	1.6 g
Sugars	3.4 g	4.1 g
Sodium	0.28 mg	344 mg

Product details

Brand: Market Basket
Barcode: 0049705067611
Quantity: 122 g
Label serving: 122 g
Category: Vegetables
Nutri-Score: A as computed by Open Food Facts
NOVA group: 4 processing level (1 to 4), as classified by Open Food Facts

Ingredients

ONIONS, WATER, SUGAR, SALT, CITRIC ACID, NATURAL FLAVOR, CALCIUM CHLORIDE ASCORBIC, ACID.

As listed on the package and transcribed by Open Food Facts contributors. Always check the package for allergens.

Ingredient guides: Onion Sugar Salt

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Food	Calories	Protein	Carbs	Fat
Chopped spinach Shoprite	29	3.5 g	4.7 g	0 g
Mixed Peppers Tesco	29	1 g	4.8 g	0.3 g
Red Cabbage Sarson	29	0.8 g	4.9 g	0.2 g
Chunky roasted vegetables Woolworth	29	0.5 g	6 g	0.3 g
Whole Green Chiles Ortega	29	0 g	2.9 g	0 g
Cauliflower Mushroom & Asparagus Medley Good & Gather	29	2.4 g	4.7 g	0 g
San Marzana Style Whole Peeled Tomatoes Hunts	29	0.83 g	5.8 g	0 g
Broccoli Florets Good & Gather	29	3.5 g	4.7 g	0 g

Per 100 g. Calories in kcal. n/a: not reported by the source.

Source of the nutrition information

USDA FoodData Central: Branded Foods, record 2065808. License: CC0 1.0 (U.S. public domain). Source record dated July 14, 2017. Imported November 6, 2026.
Open Food Facts, record 0049705067611. License: ODbL 1.0 (Open Food Facts). Source record dated February 24, 2025. Imported November 6, 2026.

Last updated: November 6, 2026. Data quality score: 100/100 (how it is calculated).

General nutrition information, not medical advice. Individual needs differ; see our disclaimer.