2 Cups Cornstarch in Grams
If you need 2 cups of cornstarch in grams, the answer is 224 g — measured spooned and levelled, according to King Arthur Baking. You are probably here mid-recipe, so here is the number first and the explanation second. The rest of this page gives you the full conversion table for cornstarch, worked examples from real recipes, the measuring method behind the number, and the mistakes that most often throw this conversion off. All weights here are approximate; a kitchen scale is the final word when precision counts.
The problem with cups, in one paragraph
A cup looks like a fixed unit, but for cornstarch it is not. The same cup can hold more or less depending on how the ingredient settled in its container, whether it was spooned in or scooped, and whether it was levelled or heaped. With 2 cups of cornstarch, the gap between a careful spoon-and-level measure and a careless scoop can be tens of grams — enough to change a recipe. Weighing 224 g instead removes the whole question. It is also faster once you get used to it: put the bowl on the scale, press tare, and pour until the display reads 224. No levelling, no sweeping, no second-guessing. The table below gives you every amount you are likely to need, so you can weigh instead of measuring by volume from now on.
Cornstarch cups to grams conversion table
| Cups | Grams | Tablespoons (approx.) |
|---|---|---|
| 1/4 cup | 28 g | 1.8 g |
| 1/3 cup | 37.3 g | 2.3 g |
| 1/2 cup | 56 g | 3.5 g |
| 2/3 cup | 74.7 g | 4.7 g |
| 3/4 cup | 84 g | 5.2 g |
| 1 cup | 112 g | 7 g |
| 1 1/2 cups | 168 g | 10.5 g |
| 2 cups | 224 g | 14 g |
| 3 cups | 336 g | 21 g |
| 4 cups | 448 g | 28 g |
The tablespoon column is a bonus for recipes that call for a spoonful or two: one tablespoon of cornstarch weighs about 7 g. Remember that a cup is 16 tablespoons, so the numbers in the table are just the cup weight divided by 16, rounded sensibly. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.
How the weight was measured
Spooned and levelled means the ingredient was measured the way King Arthur Baking measures it: spooned into the measuring cup until heaped, then levelled with a straight edge. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. The source for the 112 g per cup figure is King Arthur Baking, and the confidence in the value is high. King Arthur Baking publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
Worked examples
Pancakes on a busy morning
A pancake recipe asking for 1 1/2 cups of cornstarch needs 168 g. Pancakes are quick, and weighing the flour straight into the bowl is actually faster than spooning and levelling three half-cups. The batter stays lump-free because the flour has not been compressed, and the pancakes cook evenly because every batch starts from the same weight.
Halving a muffin recipe
Halving a muffin recipe that uses 1 cup of cornstarch means 1/2 cup, which is 112 g. Half-cup measures are notoriously inaccurate with flour because the small cup packs differently, so weighing 112 g is the reliable way to halve a recipe without the muffins turning out heavy or dry.
A layer cake that calls for 2 cups of cornstarch
A classic layer cake often asks for 2 cups of cornstarch. Weigh out 224 g and you get the crumb the recipe writer intended. If you scooped instead, you could easily add 20 to 30 g extra, and the cake would come out dense and dry. The fix is simple: weigh the flour straight into the bowl on the scale, then add the other dry ingredients on top, taring between each one. One bowl, no extra washing up, and a cake that rises the way it should.
Cornstarch in the kitchen: what the numbers mean in practice
Fine white starch from corn; a powerful thickener with no flavour of its own. It is used for Thickening sauces, gravies and custards; lightening cakes. Knowing the weight helps you shop as well as cook: 2 cups is 224 g, so a bag or jar labelled in grams tells you immediately how many cups you have left. That is useful when a recipe calls for a large amount and you are wondering whether to open a second pack. It also helps with substitutions: if you swap cornstarch for something else, compare gram weights rather than cup volumes, because two ingredients that fill the same cup can weigh very different amounts.
Thickening with cornstarch: the slurry rule
The single most useful cornstarch technique is the slurry: never tip dry cornstarch straight into a hot sauce, or it will seize into lumps that no amount of stirring will remove. Instead, stir the weighed cornstarch — about 7 g per tablespoon, approximately — into an equal amount of cold water until smooth, then whisk the slurry into the simmering liquid and cook for a minute until it turns glossy and thick. Add it near the end of cooking, because prolonged boiling breaks the starch down and thins the sauce again. Cornstarch also loses its thickening power in very acidic sauces and does not survive freezing well, so for a sharp, acidic sauce or a dish you plan to freeze, flour or another thickener is the better choice.
Frequently asked questions
How many grams is 2 cups of cornstarch?
2 cups of cornstarch weighs approximately 224 g, measured spooned and levelled. The figure comes from the King Arthur Baking value of 112 g per cup. All weights on this page are approximate — verify with a kitchen scale when precision matters.
Can I halve or double this amount?
Yes. Half of 2 cups of cornstarch is 112 g, and double is 448 g. Weighing makes scaling exact, whereas halving or doubling cups compounds measuring error. Scale the cornstarch by weight and adjust leavening and seasoning by taste rather than by a straight multiple.
How should I store cornstarch?
Airtight container, cool and dry, indefinitely. Keeping it sealed and dry also keeps the cup weight close to the 112 g per cup value used on this page.
Why do different sources give different weights for cornstarch?
Because a cup measures volume, not weight, and the weight of a volume depends on the measuring method. Spooned and levelled, scooped, sifted and packed cups of cornstarch all weigh different amounts. This page follows the King Arthur Baking method (spooned and levelled) consistently, so all the numbers here agree with each other — which matters more than matching any single outside source.
Can I use a cup instead of weighing cornstarch?
Yes, but spoon and level rather than scooping: spoon cornstarch into the cup until heaped, then sweep a knife across the top. Scooping packs the ingredient and can add 10 to 20 percent extra weight. For 2 cups, fill and level the cup twice. Weighing 224 g is more accurate and, once you are used to it, faster.
Can I use cornstarch instead of flour to thicken a sauce?
Yes, and you need much less of it: roughly one tablespoon of cornstarch, about 7 g, thickens about the same as two tablespoons of flour, and it gives a clear, glossy finish where flour gives an opaque one. Mix it into cold water first to make a slurry, then whisk it into the simmering sauce. Treat the 7 g figure as approximate and verify with a kitchen scale when precision matters, and remember that cornstarch-thickened sauces thin out if they are boiled for too long or frozen and reheated.