Onion Cups to Grams and ML
Convert chopped raw onion between cups, grams, milliliters and ounces. Enter an amount below and select the measurement units.
Quick answer: 1 cup of chopped raw onion equals 240 ml and weighs approximately 160.80 grams.
Onion Cups to Grams
These values use an approximate density of 0.67 grams per milliliter. They apply to raw onion chopped into small or medium pieces and placed loosely in the measuring cup.
| Chopped raw onion | Approximate weight |
|---|---|
| 1/4 cup | 40 g |
| 1/3 cup | 54 g |
| 1/2 cup | 80 g |
| 2/3 cup | 107 g |
| 3/4 cup | 121 g |
| 1 cup | 161 g |
| 1.5 cups | 241 g |
| 2 cups | 322 g |
| 3 cups | 482 g |
| 4 cups | 643 g |
Onion Cups to Milliliters
The converter uses a cooking cup equal to 240 milliliters.
| Chopped raw onion | Milliliters |
|---|---|
| 1/4 cup | 60 ml |
| 1/3 cup | 80 ml |
| 1/2 cup | 120 ml |
| 2/3 cup | 160 ml |
| 3/4 cup | 180 ml |
| 1 cup | 240 ml |
| 1.5 cups | 360 ml |
| 2 cups | 480 ml |
| 3 cups | 720 ml |
| 4 cups | 960 ml |
What Form of Onion Do These Values Use?
This conversion is intended for fresh, raw onion with the papery skin and root end removed. Chop the edible part into small or medium pieces before measuring.
Finely diced onion fits more closely into a cup than large chopped pieces. The size and shape of the pieces can therefore affect the exact weight.
Do Different Onion Varieties Weigh the Same?
Yellow, white, red and sweet onions can all be measured with this general conversion. Their size, moisture content and internal structure vary, so the precise weight may differ slightly.
A separate conversion is usually unnecessary for ordinary cooking. Use a kitchen scale if the recipe requires an exact weight.
Does Sliced Onion Weigh the Same?
Sliced onion may leave larger spaces in the measuring cup than chopped onion. Long or loosely separated slices can therefore weigh less per cup.
Measure the onion in the form requested by the recipe. Use this converter specifically for chopped raw onion.
Does Cooked Onion Weigh the Same?
No. Onion softens and loses water as it cooks. Sautéed or caramelized onion settles more tightly and has a different density from raw chopped onion.
Use these values for onion measured before cooking. If a recipe specifies cooked or caramelized onion, measure it after preparation.
How to Measure Chopped Onion
- Remove the dry outer skin and root end.
- Cut the onion into reasonably even pieces.
- Place the pieces loosely in the measuring cup.
- Do not press or compact the onion.
- Use a kitchen scale when the recipe provides grams.
Related Ingredient Conversions
You can also convert carrot, celery, bell pepper, potato, zucchini and tomato.
For more help, see the cups to grams conversion guide and kitchen conversion charts .