Cooking converter · USDA gram weights
Cornstarch Cups to Grams
Quick answer
1 cup of cornstarch weighs 128 g (4.52 oz). 1 tablespoon is 8 g and 1 teaspoon is 2.7 g.
- 1 cup
- 128g
- 4.52 oz
- 1 tablespoon
- 8g
- 1 teaspoon
- 2.7g
- 100 g
- 0.78cups
- of a US cup
Cornstarch is a fine, silky white powder used to thicken sauces and to lighten baking. It is usually needed in small spoonfuls, so the tablespoon and teaspoon weights are the ones cooks reach for most.
Convert any amount of cornstarch
Starts at 1 cup of cornstarch in grams (128 g); change the units to go from grams back to cups.
1 cup of cornstarch is 128 grams
- Cups
- 1
- Tablespoons
- 16
- Teaspoons
- 47.99
- Grams
- 128
- Ounces
- 4.52
Cornstarch: cups to grams and ounces
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 cup | 32 | 1.13 |
| 1/3 cup | 42.7 | 1.51 |
| 1/2 cup | 64 | 2.26 |
| 2/3 cup | 85.3 | 3.01 |
| 3/4 cup | 96 | 3.39 |
| 1 cup | 128 | 4.52 |
| 1 1/2 cups | 192 | 6.77 |
| 2 cups | 256 | 9.03 |
| 3 cups | 384 | 13.55 |
| 4 cups | 512 | 18.06 |
| Spoons | Grams | Ounces |
|---|---|---|
| 1/2 tablespoon | 4 | 0.14 |
| 1 tablespoon | 8 | 0.28 |
| 2 tablespoons | 16 | 0.56 |
| 3 tablespoons | 24 | 0.85 |
| 4 tablespoons | 32 | 1.13 |
| 6 tablespoons | 48 | 1.69 |
| 8 tablespoons | 64 | 2.26 |
| 1/4 teaspoon | 0.67 | 0.02 |
| 1/2 teaspoon | 1.3 | 0.05 |
| 3/4 teaspoon | 2 | 0.07 |
| 1 teaspoon | 2.7 | 0.09 |
| 2 teaspoons | 5.3 | 0.19 |
| 3 teaspoons | 8 | 0.28 |
Cornstarch: grams and ounces to cups
For a recipe written in grams or ounces, here is how much of a US cup each weight of cornstarch fills.
| Grams | Cups | Tablespoons | Ounces |
|---|---|---|---|
| 25 g | 0.2 | 3.13 | 0.88 |
| 50 g | 0.39 | 6.25 | 1.76 |
| 100 g | 0.78 | 12.5 | 3.53 |
| 125 g | 0.98 | 15.63 | 4.41 |
| 150 g | 1.17 | 18.75 | 5.29 |
| 200 g | 1.56 | 25 | 7.05 |
| 250 g | 1.95 | 31.25 | 8.82 |
| 300 g | 2.34 | 37.5 | 10.58 |
| 400 g | 3.13 | 50 | 14.11 |
| 500 g | 3.91 | 62.5 | 17.64 |
| Ounces (weight) | Grams | Cups | Tablespoons |
|---|---|---|---|
| 1 oz | 28.3 | 0.22 | 3.54 |
| 2 oz | 56.7 | 0.44 | 7.09 |
| 3 oz | 85 | 0.66 | 10.63 |
| 4 oz | 113.4 | 0.89 | 14.17 |
| 6 oz | 170.1 | 1.33 | 21.26 |
| 8 oz | 226.8 | 1.77 | 28.35 |
| 12 oz | 340.2 | 2.66 | 42.52 |
| 16 oz | 453.6 | 3.54 | 56.7 |
What a cup of cornstarch weighs, and why it can differ
USDA’s weight for “1 cup” is 128 g. Next to a cup of water, which holds about 236.6 g, that is 54% of the weight of a cup of water, so a lot of the cup is air. The same cup works out at 0.54 g per millilitre.
USDA lists one cup measure for cornstarch (“1 cup”), so this page has no second figure to compare it with; if a recipe depends on the exact amount, weigh it.
USDA lists no tablespoon or teaspoon measure for this entry, so that weight is the cup weight divided by the US ratio (16 tablespoons or 48 teaspoons to the cup).
Frequently asked questions
How many grams are in 1 cup of cornstarch?
How many cups is 500 g of cornstarch?
How much does a part of a cup of cornstarch weigh?
If my recipe uses 250 ml metric cups, how much cornstarch is that?
Is it better to weigh cornstarch than to measure it by the cup?
What weighs about the same as a cup of cornstarch?
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Start free on the webWeights are USDA averages for the entry named below. Packing, sifting, brand and moisture change the weight of a real cup, so treat them as a good starting point, not a lab measurement.
USDA describes this entry as “Cornstarch” (FoodData Central SR Legacy 2018-04).
Source: USDA FoodData Central, FDC 169698, retrieved . How we calculate.