Nutrition facts · Vegetables and Vegetable Products

Onion Nutrition Facts: Calories, Macros & Label

Onion has 64 calories, 1.8 g protein, 0.2 g fat and 14.9 g carbs per 1 cup, chopped — full USDA nutrition data with %DV, per-100 g values, and the FDA label below.

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The FDA Nutrition Facts label for onion

This is what onion looks like on an actual FDA Nutrition Facts panel: one serving of 1 cup, chopped (160 g), with every value rounded exactly as 21 CFR 101.9 requires — the same rounding a compliance reviewer checks. Nutrient data is USDA FoodData Central (SR Legacy, FDC ID 170000: Onions, raw).

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Nutrition Facts 1 serving per container Serving size 1 cup, choppeds (160g) Amount per serving Calories 60 % Daily Value* Total Fat 0g 0% Saturated Fat 0g 0% Trans Fat 0g Cholesterol 0mg 0% Sodium 5mg 0% Total Carbohydrate 15g 5% Dietary Fiber 3g 10% Total Sugars 7g Includes 0g Added Sugars 0% Protein 2g Vitamin D 0mcg 0% Calcium 40mg 3% Iron 0.3mg 2% Potassium 230mg 5% The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice. *
Standard vertical FDA format (21 CFR 101.9) for 1 cup, chopped of onion — rendered by the NFL label engine.

Onion nutrition facts per serving and per 100 g

Nutrient Per 1 cup, chopped % DV* Per 100 g
Calories 60 — 40
Total Fat 0g 0% 0.1g
Saturated Fat 0g 0% 0g
Trans Fat 0g — 0g
Cholesterol 0mg 0% 0mg
Sodium 5mg 0% 4mg
Total Carbohydrate 15g 5% 9.3g
Dietary Fiber 3g 10% 1.7g
Total Sugars 7g — 4.2g
Added Sugars 0g 0% 0g
Protein 2g — 1.1g
Vitamin D 0mcg 0% 0mcg
Calcium 40mg 3% 23mg
Iron 0.3mg 2% 0.2mg
Potassium 230mg 5% 146mg

* Percent Daily Values are based on a 2,000-calorie diet (FDA adult reference values). Per-serving values use the FDA's label rounding rules; per-100 g values are the unrounded USDA amounts.

Macronutrient breakdown

By calories, onion is 3% fat, 87% carbohydrate and 10% protein (Atwater 9/4/4 factors, per 1 cup, chopped). Of the 14.9 g of carbohydrate, 6.7 g is sugars and 2.7 g is dietary fiber.

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Onion nutrition FAQ

How many calories are in onion? Onion has 64 calories per 1 cup, chopped and 40 calories per 100 g, based on USDA data (Onions, raw).

How much protein is in onion? Onion has 1.8 g of protein per 1 cup, chopped, with 0.2 g of total fat and 14.9 g of carbohydrates.

Is onion high in sodium? Onion has 6.4 mg of sodium per 1 cup, chopped (0% of the Daily Value) — the FDA treats 5% DV or less as low.

What is the serving size for onion? These values use 1 cup, chopped (160 g) — the standard USDA household measure. The per-100 g column converts to any portion.

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Source: USDA FoodData Central, SR Legacy release (public domain). FDC ID 170000 — Onions, raw. Serving: 1 cup, chopped = 160 g (USDA household measure).

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