Vegetables

Onions, raw: calories and nutrition

Per 100 g, raw onions provide 40 kcal, 1.1 g protein, 0.1 g total fat, 9.34 g carbohydrates, 1.7 g fiber, 4.24 g sugars, 7.4 mg vitamin C, and 146 mg potassium.

Onions, raw in Vegetables category

Quick nutrition facts (Per 100 g / Per serving)

  • 40 kcal Calories (100 g) · 64 kcal / serving
  • 1.1 g Protein (100 g) · 1.8 g / serving
  • 0.1 g Total Fat (100 g) · 0.2 g / serving
  • 9.3 g Total Carbohydrate (100 g) · 14.9 g / serving
Macronutrient calorie share for Onions, raw Per 100 grams (40 kcal): Protein 1.1 g (10% of macro calories), Carbohydrates 9.3 g (88%), Total fat 0.1 g (2%). 40 kcal / 100 g
  • Protein 1.1 g 10%
  • Carbohydrates 9.3 g 88%
  • Total fat 0.1 g 2%
Macronutrient calorie breakdown per 100 g for Onions, raw
Macronutrient Amount per 100 g Share of macro calories
Protein 1.1 g 10%
Carbohydrates 9.3 g 88%
Total fat 0.1 g 2%

Top Nutrients (% Daily Value per 100 g)

Share of FDA 2,000 kcal reference daily intake provided by 100 grams.

Top Nutrients (% Daily Value per 100 g)
Item Amount Relative value
Total sugars 4.2 g 8% DV
Vitamin C 7.4 mg 8% DV
Dietary fiber 1.7 g 6% DV
Folate 19 µg 5% DV
Carbohydrates 9.3 g 3% DV
Potassium 146 mg 3% DV
Magnesium 10 mg 2% DV

Nutrient library

Full nutrient profile

Nutrient Per 100 g 1 cup, chopped (160 g) % Daily Value (100 g)
Energy 40 kcal 64 kcal 2%
Total fat 0.1 g 0.2 g 0%
Saturated fat 0 g 0.1 g 0%
Carbohydrates 9.3 g 14.9 g 3%
Total sugars 4.2 g 6.8 g 8%
Dietary fiber 1.7 g 2.7 g 6%
Protein 1.1 g 1.8 g 2%
Sodium 4 mg 6.4 mg 0%
Calcium 23 mg 36.8 mg 2%
Folate 19 µg 30.4 µg 5%
Iron 0.2 mg 0.3 mg 1%
Magnesium 10 mg 16 mg 2%
Potassium 146 mg 233.6 mg 3%
Vitamin A 0 µg 0 µg 0%
Vitamin B12 0 µg 0 µg 0%
Vitamin C 7.4 mg 11.8 mg 8%
Vitamin D 0 µg 0 µg 0%
Zinc 0.2 mg 0.3 mg 2%

Serving size

Recipes with Onions, raw

AI illustration

Onion Lentil Stew

Slow-cooked onions and lentils with carrots and celery, served warm.

🕐 30 min 🔥 103 kcal
AI illustration

Raw Onion Avocado Bowl

A crisp bowl of raw onion, avocado, tomato, spinach, and lime.

🕐 30 min 🔥 55 kcal
AI illustration

Roasted Onion And Veggies

Roasted onions, carrots, and potatoes served with creamy avocado.

🕐 45 min 🔥 75 kcal

View all recipes

What this means for your health

What is in it

Per 100 g, raw onions provide 40 kcal of energy. It contains 1.1 g protein, 0.1 g total fat, and 9.34 g carbohydrates. This includes 1.7 g dietary fiber and 4.24 g total sugars. It also has 7.4 mg vitamin C, 146 mg potassium, 23 mg calcium, 10 mg magnesium, and 4 mg sodium. Smaller amounts include iron, zinc, and folate.

What it means for your health

Dietary fiber is a type of carbohydrate found in plant foods. Vitamin C and potassium are nutrients found in many foods. These amounts show what this food contains per 100 g. It may fit into a varied pattern of eating.

Good to know

One cup, chopped is 160 g. One medium is 110 g. One large slice is 38 g. This food has 0.1 g total fat per 100 g. It has 4 mg sodium per 100 g. This is general education, not medical advice.

Research behind it

No research papers linked to this food yet.

Compare

Source

USDA FoodData Central (Public Domain) (ID: 170000) · Retrieved 2026-10-26

Educational information only, not medical or dietary advice. Consult a qualified health professional for personal nutrition guidance.