How many grams is a cup of red onion?

One US cup (240 ml) of red onion weighs about 160 g, or 5.6 oz.

How many grams is a tablespoon of red onion?

One US tablespoon (15 ml) of red onion weighs about 10 g, or 0.35 oz.

How many grams is a teaspoon of red onion?

One US teaspoon (5 ml) of red onion weighs about 3.3 g, or 0.12 oz.

How many cups is 100 g of red onion?

100 g of red onion is about 5/8 cup, measured in US cups of 240 ml.

Does a cup of red onion weigh the same everywhere?

No — a cup is a container, not a fixed quantity. Red onion is about 160 g per US cup (240 ml), 165 g per metric cup (250 ml) and 135 g per Japanese cup (200 ml). Gather quotes US cups unless a page says otherwise.

Kitchen converter / red onion

Red onion: cups to grams

One US cup of red onion weighs about 160 grams. Convert any amount below.

1 cup of red onion=160 g

US cup · 240 ml = 160 g · 5.6 oz

Amount

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Measure

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Ingredient

160 g / cup Fruit & vegetables by the cup

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Cup standard

Weights are approximate — see the note on scooping below.

Red onion conversion table

Measured in US cup — United States — 240 ml cup, 15 ml tablespoon.
Measure	Grams	Ounces
1 cup	160 g	5.6 oz
¾ cups	120 g	4.2 oz
⅔ cups	105 g	3.8 oz
½ cups	80 g	2.8 oz
⅓ cups	53 g	1.9 oz
¼ cups	40 g	1.4 oz
1 tbsp	10 g	0.35 oz
1 tsp	3.3 g	0.12 oz

Whose cup?

A cup is not one size. The United States measures 240 ml, the UK, Canada and New Zealand use a 250 ml metric cup, and Japan's カップ is 200 ml — so the same recipe line can mean a fifth more or less flour depending on where it was written. Australia shares the 250 ml cup but uses a 20 ml tablespoon, the only one of its size.

This page is currently showing US cup. Switch standards in the converter above and every number on the page follows.

Why weighing beats scooping

These figures describe red onion measured the usual way, but a cup is a container, not a quantity. Flour packed tightly into the cup can outweigh the same cup loosely spooned by a fifth — which is the single most common reason a baked recipe comes out differently than it did last time. If you own a scale, the gram column is the one to trust.

Why a cup of flour isn't a cup of flour →

Red onion in other languages

Useful when you are cooking from a recipe written somewhere else — these are the names the same ingredient goes by in the languages Gather supports.

English red onion
German Rote Zwiebel
Spanish cebolla morada
French oignon rouge
French (Quebec) oignon rouge
Italian cipolla rossa
Japanese 紫玉ねぎ
Portuguese (Brazil) cebola-roxa
Portuguese (Portugal) cebola-roxa

What ingredients are called elsewhere →

Weigh something similar

The nearest neighbours of red onion — same kind of ingredient, different weight per cup.

Ingredient	Per US cup
Onion	160 g
Cipollini onion	160 g
Green onion	100 g
Pearl onion	160 g
Spring onion	100 g
Sweet onion	160 g

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