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Onions

Onions

EverydayFresh

Onion is a foundational bulb vegetable in the Allium family, recognized for its layered structure and sulfur compounds that create a pungent aroma when cut. Fresh onions provide vitamin C, antioxidants like quercetin, and prebiotic fibers while remaining low in calories. Their flavor profile transforms dramatically with cooking – developing caramelized sweetness when sautéed – and varieties differ significantly, with red onions preferred raw for crunch, yellow for cooking, and white for sharpness in salsas.

Macro Impact

A 4 oz serving contains 45 calories, 1g protein, 11g carbs, and 0g fat.

Calorie Burn

How long would it take to burn off 45 calories?
Walking3.5 mph, moderate pace
10 min
YogaModerate effort, gentle pace
8 min
SwimmingModerate effort, freestyle
6 min
Biking12-14 mph, moderate effort
5 min
StairsStair climbing, moderate pace
5 min
Running5 mph (12 min/mile)
4 min

Nutrition Facts

Serving size4 oz (110 g)
Amount per serving
Calories45
% Daily Value*
Total Fat0.1g
0%
Saturated Fat0.1g
0%
Trans Fat0g
Polyunsaturated Fat0.0g
Monounsaturated Fat0.0g
Cholesterol0mg
0%
Sodium4mg
0%
Total Carbohydrate11g
4%
Dietary Fiber2g
7%
Total Sugars5g
Includes Added Sugars0g
0%
Protein1g
Vitamin D0mcg
0%
Calcium25mg
2%
Iron0.3mg
1%
Potassium175mg
4%

* The % Daily Value (DV) tells you how much a nutrient in a serving contributes to a daily diet.

Nutrient Breakdown

Nutrient breakdown based on appropriate daily intake recommendations for a 175lb adult.

Carbs
Total Carbs
11 / 275 g
4%
Fiber
2 / 28 g
7%
Sugars
5 g
Added Sugars
0 / 50 g
0%
Soluble Fiber
1 g
Insoluble Fiber
1 g
Sugar Alcohols
0 g
Xylitol
0 g
Sorbitol
0 g
Other Carbohydrates
0 g
Fat
Total Fat
0 / 78 g
0%
Monounsaturated
0 / 31 g
0%
Polyunsaturated
0 / 23 g
0%
Saturated
0 / 23 g
0%
Trans
0 g
Cholesterol
0 / 300 g
0%
Omega 3
0 / 5 g
0%
Omega 6
0 / 19 g
0%
Omega 9
0 g
Protein
Protein
1 / 80 g
2%
Amino Acids
Histidine
0 / 3 g
0%
Isoleucine
0 / 2 g
1%
Leucine
0 / 3 g
1%
Lysine
0 / 2 g
2%
Methionine
0 / 1 g
0%
Phenylalanine
0 / 2 g
1%
Threonine
0 / 1 g
2%
Tryptophan
0 / 0 g
5%
Valine
0 / 2 g
1%
Arginine
0 g
Cysteine
0 g
Cystine
0 g
Tyrosine
0 g
Alanine
0 g
Aspartic Acid
0 g
Glutamic Acid
0 g
Glycine
0 g
Proline
0 g
Serine
0 g
Vitamins
Thiamine, B1
0 / 1 mg
4%
Riboflavin, B2
0 / 1 mg
2%
Niacin, B3
0 / 15 mg
1%
Pantothenic Acid, B5
0 / 5 mg
3%
Pyridoxine, B6
0 / 1 mg
12%
Biotin, B7
1 / 30 mcg
3%
Cobalamin, B12
0 / 2 mcg
0%
Folate
27 / 400 mcg
7%
Vitamin A
3 / 800 mcg
0%
Vitamin C
8 / 83 mg
10%
Vitamin D
0 / 15 mcg
0%
Vitamin E
0 / 15 mg
0%
Vitamin K
0 / 105 mcg
0%
Minerals
Calcium
25 / 1k mg
3%
Copper
0 / 1 mg
3%
Iron
0 / 13 mg
2%
Magnesium
11 / 370 mg
3%
Manganese
0 / 2 mg
8%
Phosphorous
33 / 700 mg
5%
Potassium
175 / 3k mg
6%
Selenium
0 / 55 mcg
1%
Sodium
4 / 2.3k mg
0%
Zinc
0 / 10 mg
2%
Chromium
0 / 30 mcg
0%
Molybdenum
0 / 45 mcg
0%
Iodine
0 / 150 mcg
0%
Chlorine
0 / 2.3k mg
0%
Other
Ethyl Alcohol
0 g
Water
98 g
Caffeine
0 mg
Choline
7 mg
Taurine
0 mg

References

Data on this page was sourced from a number of official governmental and non-governmental sources, including:

  1. 1.Onions, raw. USDA Standard Reference, Legacy. Food ID 170000.
  2. 2.Onion, raw. Canadian Nutrient File. Food ID 2401.
  3. 3.Onion, raw. Frida. Public Food Key 716.

Disclaimer & Important Notices

1. Informational Purposes Only: All nutritional information provided by OpenNutrition is for general informational purposes only. Our data is explicitly not intended to replace professional medical, nutritional, or dietary advice.

2. Accuracy & Reliability: We strive to ensure accuracy and quality using authoritative sources and AI-based validation; however, we make no guarantees regarding completeness, accuracy, or timeliness. Always confirm nutritional data independently when accuracy is critical.

3. Health Decisions: Never rely solely on OpenNutrition data when making health, medical, or dietary decisions. Always consult your healthcare provider or a registered dietitian for personalized health advice.

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