Vegetables and greens

Raw onion

According to TACO, NEPA/Unicamp, 4th edition, Campinas, São Paulo, Brazil, every 100 g of raw onion has 36 kcal, 1.2 g of protein, 8.6 g of carbs, 0.2 g of fat and 1.7 g of fiber.

Calculate your serving

36 kcal

1.2g Protein

8.6g Carbs

0.2g Fat

1.7g Fiber

Values per 100 g from the Darwin base, attributed to TACO (NEPA/Unicamp, 4th edition). The food description says whether it is raw, cooked or prepared.

Calculate the composition for another amount

Enter the weight, in grams, of the food in the form described above. The calculator adjusts the catalog data by simple proportion. It does not estimate added ingredients, household measures or a meal plan.

Food weight in grams (1 to 2,000)

Composition estimated by proportion for 100 g

Energy: 36 kcal
Protein: 1.2 g
Carbs: 8.6 g
Fat: 0.2 g
Fiber: 1.7 g

Calculation based on the values registered per 100 g. Check the original TACO (NEPA/Unicamp).

In a usual serving

In this catalog's reference serving, 100 g (100g), raw onion has:

36 kcal
1.2 g of protein
8.6 g of carbs
0.2 g of fat
1.7 g of fiber

Recalculated linearly from 100 g. The household measure was registered in Darwin; it is not an amount recommended for you nor an official standardized measure from TACO.

The catalog records a numeric value of zero for vitamin A, folate. This does not prove absolute absence nor mean that all brands and preparation methods have the same composition.

Equivalent substitutions

A serving of raw onion (1/2 unidade média crua (60g)) and what yields the same exchange in the "Vegetais não-folha ~ 10g carbo" group in the other options below.

Cooked carrot 1 unidade média (80g)
Cooked beets 3 fatias (80g)
Abobrinha refogada 1 porção (100g)
Tomato 1 unidade média (120g)
Cucumber 1 unidade (200g)
Cooked broccoli 2 ramagens médias (100g)
Cooked cauliflower 1 porção (100g)
Vagem cozida 1 porção (100g)
Cooked chayote 1/2 unidade média (80g)
Berinjela refogada 1 porção (100g)
Green bell pepper 1/2 unidade grande (80g)
Cebola refogada 1/2 unidade média (60g)
Palmito 2 palmitos médios (60g)
Milho cozido 3 colheres sopa (60g)
Raw carrot 1 unidade média crua (80g)
Cooked okra 1 porção (100g)
Cooked tomato 1 porção (100g)
Cooked turnip 1 unidade pequena (100g)

Comparison within vegetables and greens

Raw onion ranks 15th in fiber among the 25 foods of its category in this database, calculated from TACO, NEPA/Unicamp, 4th edition, Campinas, São Paulo, Brazil.

Food	kcal	Protein (g)	Carbs (g)	Fiber (g)

Darwin catalog values per 100 g, attributed to TACO. Foods may have different preparation methods; sorting does not produce a ranking of nutritional quality.

Micronutrients (per 100 g)

Calcium	23 mg
Iron	0.2 mg
Sodium	3 mg
Potassium	157 mg
Zinc	0.2 mg
Vitamin C	7.4 mg
Vitamin A (RAE)	0 mcg
Folate	0 mcg
Vitamin B12	19 mcg
Magnesium	9 mg
Phosphorus	35 mg

Source: TACO, NEPA/Unicamp, 4th edition, Campinas, São Paulo, Brazil, via the Darwin database.

How to read this data

The composition reference gives amounts per 100 g of the edible part, in the form of the food indicated by its name. A raw version is not equivalent to the same mass already cooked: water, preparation, salt, oil and fillings can change the results.

A zero value in the catalog does not guarantee absolute absence of the nutrient. Darwin's numbers are a reference reading and do not replace the product packaging or an individual nutritional assessment.

Sources and further reading

NEPA/Unicamp: Brazilian Food Composition Table, 4th edition: declared reference for the numeric values in the catalog.
USP: Brazilian Food Composition Table (TBCA): complementary lookup for preparation types and variation; we do not mix numbers from this base with those from TACO.
Anvisa: food labeling: official guidance on ingredients, labels and relevant warnings.

Frequently asked questions

About raw onion

Composition and nutrients

How many calories are in raw onion?

Raw onion has 36 kcal per 100 g. In a usual serving of 100 g (100g), that is 36 kcal, according to TACO, NEPA/Unicamp, 4th edition, Campinas, São Paulo, Brazil.

How much protein does Raw onion have?

Raw onion has 1.2 g of protein per 100 g, according to TACO, NEPA/Unicamp, 4th edition, Campinas, São Paulo, Brazil.

What does a zero value mean in the catalog for raw onion?

In the base used by Darwin, vitamin A, folate appears with a numeric value of zero. This record does not prove absence in all varieties or preparations. Check the original source and the product label.

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