Vegetable

Onions (spring or scallions, raw) Nutrition Facts

USDA description: Onions, spring or scallions (includes tops and bulb), raw

Per 100 g, Onions (spring or scallions, raw) provides 32 calories. A typical portion, 1 medium (15 g), has 5 calories, 0.3 g protein, 1.1 g carbs and 0 g fat.

calories
32
protein
1.8 g
carbs
7.3 g
fat
0.2 g

Per 100 g.

Calories and macros per serving

Serving weights are USDA's own for this record; each value is the per-100 g amount scaled to that weight. % = share of the FDA Daily Value.

Onions (spring or scallions, raw): calories, protein, carbs, fat, fiber and sugars per serving
ServingCaloriesProteinCarbsFatFiberSugars
100 g322%1.8 g4%7.3 g3%0.2 g<1%2.6 g9%2.3 g
1 cup, chopped100 g322%1.8 g4%7.3 g3%0.2 g<1%2.6 g9%2.3 g
1 tbsp chopped6 g2<1%0.1 g<1%0.4 g<1%0 g<1%0.2 g1%0.1 g
1 large25 g8<1%0.5 g1%1.8 g1%0 g<1%0.7 g2%0.6 g
1 medium4-1/8" long · 15 g5<1%0.3 g1%1.1 g<1%0 g<1%0.4 g1%0.3 g
1 small3" long · 5 g2<1%0.1 g<1%0.4 g<1%0 g<1%0.1 g<1%0.1 g

Calories in kcal. n/r = not reported for this food.

How Onions ranks among vegetables

Rank 1 = the most of that nutrient among the vegetables on CalorieExplorer. Per 200 kcal shows nutrient density: how much you get for the same calories.

NutrientPer 100 gPer 200 kcal
Protein1.8 g#64 of 126 vegetables11 g#58 of 126 vegetables
Fiber2.6 g#41 of 115 vegetables16 g#38 of 115 vegetables
Potassium276 mg#54 of 126 vegetables1,725 mg#49 of 126 vegetables
Calcium72 mg#15 of 126 vegetables450 mg#14 of 126 vegetables
Iron1.5 mg#23 of 126 vegetables9.3 mg#14 of 126 vegetables
Magnesium20 mg#56 of 125 vegetables125 mg#47 of 125 vegetables
Vitamin C19 mg#50 of 123 vegetables118 mg#48 of 123 vegetables
Vitamin A50 µg#48 of 117 vegetables313 µg#47 of 117 vegetables

Macronutrient Breakdown

19%
Protein
76%
Carbs
4%
Fat

Compared with the median of vegetables

Per 100 g; median of the 125 vegetables with a value.

Calories
Onions: 32 kcal
median: 33 kcal
Protein
Onions: 1.8 g
median: 1.8 g
Carbs
Onions: 7.3 g
median: 7 g
Fat
Onions: 0.2 g
median: 0.3 g
Fiber
Onions: 2.6 g
median: 2.3 g

Vitamins and minerals

NutrientPer 100 g%DVPer 1 medium (15 g)%DV
Saturated fat0 g<1%0 g<1%
Trans fat0 gno DV0 gno DV
Cholesterol0 mg0%0 mg0%
Sodium16 mg1%2.4 mg<1%
Vitamin D0 µg0%0 µg0%
Calcium72 mg6%11 mg1%
Iron1.5 mg8%0.22 mg1%
Potassium276 mg6%41 mg1%
Vitamin A (RAE)50 µg6%7.5 µg1%
Vitamin C19 mg21%2.8 mg3%
Vitamin E0.55 mg4%0.08 mg1%
Vitamin K207 µg173%31 µg26%
Thiamin (B1)0.06 mg5%0.01 mg1%
Riboflavin (B2)0.08 mg6%0.01 mg1%
Niacin (B3)0.53 mg3%0.08 mg<1%
Vitamin B60.06 mg4%0.01 mg1%
Folate (approx.)64 µg16%9.6 µg2%
Vitamin B120 µg0%0 µg0%
Phosphorus37 mg3%5.6 mg<1%
Magnesium20 mg5%3 mg1%
Zinc0.39 mg4%0.06 mg1%
Selenium0.6 µg1%0.09 µg<1%
Copper0.08 mg9%0.01 mg1%
Manganese0.16 mg7%0.02 mg1%

Source: U.S. Department of Agriculture, FoodData Central, FDC ID 170005 (SR Legacy, April 2018 final release). Values per 100 g as published in that record, imported 2026-03-13; serving weights from the same record, retrieved 2026-10-13.

% Daily Value: FDA Daily Values (2016 Nutrition Facts label rule, 21 CFR 101.9), adults and children 4+. Ranks compare the foods of the same category on this site. How we calculate.

Last updated . Values are averages for the food as described; brands, varieties and cooking change them. Not medical advice.

Explore rankings

Meals made with onions on FoodCaloriesHub