Kaunto

Calories in Onion

Onion has 40 kcal per 100 g, with 1.1 g protein, 9.3 g carbohydrate and 0.1 g fat. 1 medium onion (110 g) is 44 kcal.

Nutrition per serving

Serving kcal Protein Carbs Fat Fiber Sugars Sat. fat Sodium
100 g 40 1.1 g 9.3 g 0.1 g 1.7 g 4.2 g 0 g 4 mg
1 cup, chopped · 160 g 64 1.8 g 15 g 0.2 g 2.7 g 6.7 g 0 g 6 mg
1 cup, sliced · 115 g 46 1.3 g 11 g 0.1 g 2 g 4.8 g 0 g 5 mg
1 tbsp chopped · 10 g 4 0.1 g 0.9 g 0 g 0.2 g 0.4 g 0 g 0 mg
1 large · 150 g 60 1.7 g 14 g 0.2 g 2.6 g 6.3 g 0 g 6 mg
1 slice, large · 38 g 15 0.4 g 3.5 g 0 g 0.6 g 1.6 g 0 g 2 mg
1 medium · 110 g 44 1.2 g 10 g 0.1 g 1.9 g 4.6 g 0 g 4 mg

Where the calories come from

10% protein · 88% carbohydrate · 2% fat, by energy (4, 4 and 9 kcal per gram).

  • Protein 10%
  • Carbs 88%
  • Fat 2%

1 medium onion on the day view

What logging 1 medium onion looks like in Kaunto: 44 kcal is 2% of a 2,000 kcal day.

The reference day is a scale, not a target; the macro calculator estimates your own.

Calories 44 of 2,000 kcal

Macro loadout

Pro 1%
1.2 / 150g
Carb 5%
10 / 200g
Fat 0%
0.1 / 60g
1 medium onion on a 2,000 kcal reference day (150 g protein · 200 g carbs · 60 g fat). A scale for reading the numbers, not a target.

Compared with other vegetables

Per 100 g. Closest by protein per calorie.

Food kcal Protein Carbs Fat
Onion 401.1 g9.3 g0.1 g
Baked potato, with skin 932.5 g21 g0.1 g
Grape tomatoes 270.8 g5.5 g0.6 g
Celery 170.5 g3.3 g0.2 g
Jalapeño pepper 290.9 g6.5 g0.4 g
Sweet potato, baked 902 g21 g0.2 g

Frequently asked questions

How many calories are in 1 medium onion?

1 medium onion (110 g) contains 44 kcal, 1.2 g protein, 10 g carbohydrate and 0.1 g fat.

How much protein is in onion?

Onion has 1.1 g of protein per 100 g, which is 1.2 g in 1 medium onion.

What are the macros of onion?

Per 100 g: 1.1 g protein, 9.3 g carbohydrate, 0.1 g fat. By energy that is 10% protein, 88% carbohydrate and 2% fat, so most of its calories come from carbohydrate.

Source: USDA FoodData Central, “Onions, raw”, FDC ID 170000 (SR Legacy), as indexed by Kaunto. Per-serving figures are scaled from the 100 g values and rounded. Counting macros for the first time? Start with how to count macros.