Convert Cornstarch: cups to grams
1 cup of Cornstarch = 112 grams
Amount of Cornstarch
Density: 0.473 g/ml · Cornstarch
Cornstarch: cups to grams at a glance
The amounts people ask for most, worked out for Cornstarch.
How much Cornstarch weighs
Every figure below is one measured number — 112 g per US cup — scaled. That is why this table and the converter above it cannot disagree.
One cup, side by side
Why is cornstarch published per quarter cup?
Because that is nearer the amount a recipe asks for. King Arthur lists cornstarch at 28 g per quarter cup; four of those make the 112 g per cup that dishscale converts from. The arithmetic is exact, so a quarter cup still reads 28 g when you convert back.
Source for Cornstarch: King Arthur Baking (28 g per 1/4 cup) · King Arthur Baking ingredient weight chart
Frequently asked questions
How many grams is 1 cup of Cornstarch?
1 cup of Cornstarch is 112 grams, because one US cup of Cornstarch weighs 112 g. That single measured figure is the whole conversion — every other unit on this page is derived from it.
How many cups is 100 grams of Cornstarch?
100 grams of Cornstarch is 0.893 cups. It is the same conversion read backwards, so this page and its reverse always agree.
Why doesn't a cup of Cornstarch weigh the same as a cup of anything else?
Because a cup is a fixed volume — 236.588 ml — and what it weighs depends entirely on what you put in it. A cup of Cornstarch is 112 g. The same cup holds 120 g of all-purpose flour, 236.6 g of water, 336 g of honey. Converting without naming the ingredient is guessing, and across this site's ingredients the spread from the lightest cup to the heaviest is fourfold.
Where does dishscale's figure for Cornstarch come from?
One US cup of Cornstarch is 112 g. The dataset records that as: “King Arthur Baking (28 g per 1/4 cup)”. That is the King Arthur Baking ingredient weight chart. Every ingredient on the site carries the reference its weight came from, so any number here can be checked — and corrected if the source disagrees.