Two-Thirds Cup of Cornstarch in Grams
2/3 cup of cornstarch weighs 85.33g (3.01 oz, 160ml) according to USDA FoodData Central (1 cup cornstarch = 128g, spooned and leveled method). 2/3 cup = 0.6667 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Cornstarch Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 2/3 cup.
| Amount | Grams |
|---|---|
| 1 tbsp | 8g |
| 2 tbsp | 16g |
| 1/8 cup | 16g |
| 1/4 cup | 32g |
| 1/3 cup | 42.67g |
| 1/2 cup | 64g |
| 2/3 cupthis page | 85.33g |
| 3/4 cup | 96g |
| 1 cup | 128g |
| 1 1/4 cups | 160g |
| 1 1/2 cups | 192g |
| 1 3/4 cups | 224g |
| 2 cups | 256g |
| 2 1/2 cups | 320g |
| 3 cups | 384g |
Source: USDA FoodData Central (FDC ID: 20027). 1 US cup = 240ml. Values use spooned-and-leveled method.
2/3 Cup of Different Ingredients — Weight Comparison
2/3 cup of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 2/3 Cup (g) |
|---|---|
| Cocoa Powder (unsweetened) | 66.67g |
| Tapioca Flour (Starch) | 80g |
| Cornstarchcurrent | 85.33g |
| Arrowroot Powder | 85.33g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Cornstarch Accurately
Why weight matters: 2/3 cup of cornstarch can weigh anywhere from 73g to 102g depending on how you measure it. The USDA standard is 85.33g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About cornstarch density: Cornstarch (corn flour in UK) is a fine white powder. 1 cup = 128g. Used as a thickener for sauces and gravies. 1 tablespoon cornstarch = 2 tablespoons all-purpose flour as a thickener.
About 2/3 Cup as a Measurement
2/3 cup = 10 tablespoons + 2 teaspoons = 160ml. This measure appears when scaling up 1/3 cup recipes by doubling. Use two 1/3-cup measures for accuracy, as 2/3 cup sets are less common.
Two-thirds cup is often seen in oatmeal cookie recipes, breakfast grain bowls, and rice cooker recipes for 2 servings. It equals exactly 160ml or approximately 5.4 fluid ounces.
Frequently Asked Questions
How many grams is 2/3 cup of cornstarch?
2/3 cup of cornstarch weighs 85.33 grams (3.01 oz, 160ml). Based on USDA FoodData Central: 1 cup cornstarch = 128g, so 2/3 cup = 128 × 0.667 = 85.33g.
Is 2/3 cup of cornstarch the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 85.33g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 85.33g is the most reliable baseline for recipes.
How do I accurately measure 2/3 cup of cornstarch?
For accuracy, use a kitchen scale and weigh 85.33g of cornstarch. If using measuring cups, spoon the cornstarch lightly into a 2/3 Cup measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 2/3 cup of cornstarch compare to other ingredients?
2/3 cup of different ingredients varies significantly: Cocoa Powder (unsweetened) = 66.67g, Tapioca Flour (Starch) = 80g, Cornstarch = 85.33g. This is because each ingredient has a different density.