How many grams is 2 1/2 cups of cornstarch?
How many grams is 2 1/2 cups of cornstarch?
Answer
One US cup (236.6 ml) of cornstarch weighs 128 grams, from USDA FoodData Central, SR Legacy entry 169698 “Cornstarch”, portion “1 cup” = 128 grams.
2 1/2 cups of cornstarch equals 320 grams; the way back, from grams to cups, is the Grams to Cups converter.
This is the US customary cup of 236.6 ml. A recipe written for the metric cup of 250 ml (Australia, New Zealand, Canada) means 5.7 % more: 338.1 grams.
How 2 1/2 cups of cornstarch was converted to grams
One US cup of cornstarch weighs 128 grams (one hundred twenty-eight), so multiply 2 1/2 by 128.
2 1/2 × 128 g
=320 grams
(three hundred twenty grams)
The weight of the cup comes from USDA FoodData Central, SR Legacy entry 169698 “Cornstarch”, portion “1 cup” = 128 grams. Scooped ingredients vary with how they are filled — spooned in lightly, a cup weighs less; packed down, more — so for baking a kitchen scale is the exact tool and this figure the standard reference.
2 1/2 cups of other ingredients in grams
The same cup weighs differently for every ingredient: airy ones such as oats and cocoa are light, dense ones such as honey and salt heavy. Your ingredient is highlighted.
| Ingredient | 2 1/2 cups in grams | One US cup weighs |
|---|---|---|
| All-purpose flour | 312.5 grams | 125 grams |
| Granulated sugar | 500 grams | 200 grams |
| Brown sugar, packed | 550 grams | 220 grams |
| Brown sugar, unpacked | 362.5 grams | 145 grams |
| Powdered sugar, unsifted | 300 grams | 120 grams |
| Powdered sugar, sifted | 250 grams | 100 grams |
| Butter | 567.5 grams | 227 grams |
| Water | 591.5 grams | 236.6 grams |
| Whole milk | 610 grams | 244 grams |
| White rice, uncooked | 462.5 grams | 185 grams |
| White rice, cooked | 395 grams | 158 grams |
| Rolled oats | 202.5 grams | 81 grams |
| Honey | 847.5 grams | 339 grams |
| Table salt | 730 grams | 292 grams |
| Cocoa powder | 215 grams | 86 grams |
| Plain yogurt | 612.5 grams | 245 grams |
| Olive oil | 540 grams | 216 grams |
| Vegetable oil | 545 grams | 218 grams |
| Heavy cream | 595 grams | 238 grams |
| Sour cream | 575 grams | 230 grams |
| Peanut butter | 645 grams | 258 grams |
| Cornstarch | 320 grams | 128 grams |
If the ingredient is not settled yet, start from how many grams 2 1/2 cups is across every ingredient at once.
The other way round: how many cups a weight fills
This page starts from cups and answers in grams. The opposite question — how many cups a weight from a recipe fills — is what the grams to cups converter is for. Both read the same USDA weights, so their numbers agree: 100 grams of cornstarch is 0.78 cups there.
Related Calculations
See Also
- Grams to Cups - How many US cups a weight of flour, sugar, butter, rice or another ingredient fills — by USDA cup weights
- Cups to Ml - Convert Cups to Milliliters
- Ml to Cups - Convert Milliliters to Cups
- Cups to Tablespoons - Convert Cups to Tablespoons
- Oz to Grams - Convert Ounces to Grams
- Gallons to Pounds - How much a gallon of water, milk, gasoline, diesel, oil or propane weighs in pounds — by density

US cups of cornstarch to grams
| Cups | Grams |
|---|---|
| 1 1/3 cups | 170.7 grams |
| 1 1/2 cups | 192 grams |
| 1 2/3 cups | 213.3 grams |
| 1 3/4 cups | 224 grams |
| 2 cups | 256 grams |
| 2 1/4 cups | 288 grams |
| 2 1/3 cups | 298.7 grams |
| 2 1/2 cups | 320 grams |
| 2 2/3 cups | 341.3 grams |
| 2 3/4 cups | 352 grams |
| 3 cups | 384 grams |
| 3 1/4 cups | 416 grams |
| 3 1/3 cups | 426.7 grams |
| 3 1/2 cups | 448 grams |
| 3 3/4 cups | 480 grams |