How many grams in a cup of chopped onion?
1 cup of chopped onion weighs 160 g. 1 tablespoon: 10 g 1 teaspoon: 3.3 g Weights are for chopped onion, in US customary cups.
Convert any amount
= 160 g
Fractions work too, like 1/2 or 1 1/2.
Cups to grams
| Cups | Grams |
|---|---|
| ⅛ cup | 20 g |
| ¼ cup | 40 g |
| ⅓ cup | 53 g |
| ½ cup | 80 g |
| ⅔ cup | 107 g |
| ¾ cup | 120 g |
| 1 cup | 160 g |
| 1 ½ cups | 240 g |
| 2 cups | 320 g |
| 3 cups | 480 g |
Grams to cups
| Grams | US measure |
|---|---|
| 25 g | 2 ½ tbsp |
| 50 g | ¼ cup + 1 tbsp |
| 100 g | ⅝ cup |
| 150 g | ¾ cup + 3 tbsp |
| 200 g | 1 ¼ cups |
| 250 g | 1 ½ cups + 1 tbsp |
| 500 g | 3 ⅛ cups |
| 1,000 g | 6 ¼ cups |
Rounded to amounts you can measure; ≈ marks a rounded answer.
Measuring chopped onion
Chopped, not sliced: a cup of sliced onion weighs about 115 g.
These weights are for chopped onion. A different form, or a cup filled another way, weighs differently, so weigh it if the recipe gives grams.
Source
USDA FoodData Central, food 170000: “Onions, raw”, 1 cup, chopped = 160 g (USDA FoodData Central SR Legacy, April 2018). Other amounts are calculated with 1 cup = 16 tablespoons = 48 teaspoons. Data version 2026-11-06.1, reviewed 6 November 2026.
How every weight is chosen, converted and rounded: sources and method.
Scaling a recipe?
Paste the ingredients into the recipe scaler to double, halve or resize every amount at once. The guides to cutting a recipe in half and doubling a recipe turn the results into cups and spoons you can measure.