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Yellow onion calories

Yellow onion, raw
54kcal
1 medium onion · 143 g, raw
9%protein
1.2 gProtein
12 gCarbs
0.1 gFat
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Nutrition facts
Raw · per 143 g
Calories54 kcal
Protein1.2 g
Carbohydrate12.3 g
Fat0.1 g
Sodium1 mg
Potassium260 mg
Iron0.4 mg

Source: USDA FoodData Central

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Verified nutrition data

Numbers on this page come from USDA FoodData Central, the U.S. Department of Agriculture’s food composition database, and from manufacturer labels where a branded product is named. Last verified September 2026. How we verify our data →

Most popular yellow onion brands in the United States
Ranked by popularity in the BodyPal database
#  Productkcal / 100 g
1Vega Produce Yellow Onion1 cup · 160 g40 kcal
2Ahold Yellow Onion5.3 oz · 148 g30 kcal
3Hannaford Yellow Onions1 medium onion · 148 g41 kcal
4Table Fresh Yellow Onion Diced170 g41 kcal
5ShopRite Yellow Onions148 g41 kcal
6BJ's Wholesale Club Fresh Yellow Onion1 medium onion · 148 g30 kcal
7Papa John's Salads & Produce Diced Yellow Onions3 oz · 85 g41 kcal

Source: manufacturer labels / USDA FoodData Central.

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Yellow onion FAQs
How many calories are in one yellow onion?

A medium raw yellow onion (143 g) is about 54 calories. Per 100 g, raw yellow onion has 38 calories.

Is yellow onion good for weight loss?

A medium onion adds 54 calories, 2.7 g of fiber and almost no fat at 0.1 g. Sauteing changes that: a cup of sauteed yellow onion is 107 calories, with 9.4 g of fat from the cooking fat.

Yellow onion vs sweet onion: which has fewer calories?

Raw yellow onion is 38 calories per 100 g and sweet onion is 32, so the difference over a medium 143 g onion is only a few calories.

How many carbs are in a yellow onion?

A medium raw yellow onion (143 g) has 12.3 g of carbs, 2.7 g of it fiber. Per 100 g that is 8.6 g of carbs and 1.9 g of fiber.