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Onion (cooked, boiled, drained, unsalted)
Vegetables

Onion (cooked, boiled, drained, unsalted) nutrition facts

Per 1 medium onion · 94 g

Calories
41
2%
of a 2,000 cal day
  • Protein
    1.3g
    12% of calories
  • Carbs
    9.5g
    84% of calories
  • Fat
    0.2g
    4% of calories
Portion
  • ✓ Fat free
  • ✓ Low saturated fat
  • ✓ Sodium free
  • ✓ Cholesterol free

At a glance

One serving of Onion (cooked, boiled, drained, unsalted) (1 medium onion, 94 g) has 41 calories, with 1.3 g of protein, 9.5 g of carbohydrates and 0.2 g of fat. Most of its energy comes from carbs (84% of calories).

Per 100 g
44cal
very low energy density
Protein per 100 cal
3.1g
Net carbs
8g
carbs minus fiber
Fiber
1.3g
4.4 g sugar

Vitamins & minerals

Amounts for 1 medium onion (94 g). Bars show % of the daily value.

Vitamins

NutrientAmount% Daily Value
Vitamin A0 μg
0%
Vitamin C5 mg
5%
Vitamin D0 μg
0%
Vitamin E0 mg
0%
Vitamin K0.5 μg
0%
Thiamine0 mg
3%
Riboflavin (B2)0 mg
2%
Niacin0.2 mg
1%
Vitamin B60.1 mg
9%
Folate (B9)14 μg
4%
Vitamin B120 μg
0%
Pantothenic acid0.1 mg
2%
Choline6 mg
1%

Minerals

NutrientAmount% Daily Value
Calcium21 mg
2%
Iron0.2 mg
3%
Potassium156 mg
3%
Magnesium10 mg
2%
Phosphorus33 mg
5%
Zinc0.2 mg
2%
Copper0.1 mg
7%
Manganese0.1 mg
6%
Selenium1 μg
1%
Full breakdown · 37 more nutrients
NutrientAmount% Daily Value
Alanine0 g—
Alpha carotene0 μg—
Arginine0.2 g—
Aspartic acid0.1 g—
Beta carotene1 μg—
Caffeine0 mg—
Cystine0 g—
Docosahexaenoic Acid (DHA)0 g—
Docosapentaenoic Acid (DPA)0 g—
Eicosapentaenoic Acid (EPA)0 g—
Fructose1 g—
Galactose0 g—
Glucose2 g—
Glutamic acid0.2 g—
Glycine0.1 g—
Histidine0 g—
Isoleucine0 g—
Lactose0 g—
Leucine0 g—
Lycopene0 μg—
Lysine0.1 g—
Maltose0 g—
Methionine0 g—
Monounsaturated fats0 g—
Phenylalanine0 g—
Polyunsaturated fats0.1 g—
Proline0 g—
Retinol0 μg—
Serine0 g—
Sucrose1 g—
Theobromine0 mg—
Threonine0 g—
Total omega 30 g—
Total omega 60 g—
Tryptophan0 g—
Tyrosine0 g—
Valine0 g—

How it compares

Calories per 100 g, so different serving sizes compare fairly.

Similar foods

Burning 41 calories

Estimated for a 70 kg (154 lb) adult using MET values from the Compendium of Physical Activities.

  • 8min
    Walking (3.5 mph)
  • 5min
    Cycling (moderate)
  • 3min
    Running (6 mph)
  • 6min
    Swimming laps

Common questions

How many calories are in Onion (cooked, boiled, drained, unsalted)?

One serving of Onion (cooked, boiled, drained, unsalted) (1 medium onion) has 41 calories, which works out to 44 calories per 100 g. That is about 2.1% of a 2,000-calorie day.

Is Onion (cooked, boiled, drained, unsalted) high in protein?

Not especially. It has 1.3 g of protein per serving, and protein supplies 12% of its calories. Foods where protein provides 30% or more of calories are generally considered protein-dense.

Is Onion (cooked, boiled, drained, unsalted) keto-friendly?

It is hard to fit into a strict keto diet. One serving has 8 g of net carbs and 84% of its calories come from carbohydrates, while most keto plans cap net carbs at 20–50 g per day.

How much sodium is in Onion (cooked, boiled, drained, unsalted)?

2.8 mg per serving, which meets the FDA definition of low sodium (140 mg or less).

How much sugar is in Onion (cooked, boiled, drained, unsalted)?

4.4 g of total sugars per serving. Labels list total sugars, which include natural sugars from fruit and milk as well as any added sugars.

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