There are about 138 grams in a cup of cornmeal if it's whole grain, according to King Arthur Baking. The same chart lists Quaker yellow cornmeal, a finer degermed style, at 156 g per cup, so a cup of cornmeal can land anywhere from about 138 to 156 g depending on the type.
| Amount | Whole grain cornmeal | Degermed yellow cornmeal (Quaker) |
|---|---|---|
| 1 tbsp | 8.6 g | 9.8 g |
| 1/4 cup | 34.5 g | 39 g |
| 1/3 cup | 46 g | 52 g |
| 1/2 cup | 69 g | 78 g |
| 2/3 cup | 92 g | 104 g |
| 3/4 cup | 104 g | 117 g |
| 1 cup | 138 g | 156 g |
That 18 g gap is why cornbread can come out tender one week and dry the next, even when you follow the same recipe. The fix is knowing which cornmeal you have and weighing it.
Why cornmeal weights vary so much
Cornmeal isn't one product. A few differences change how much fits in a cup:
- Whole grain vs degermed. Whole grain (often stone ground) cornmeal keeps the germ and bran. Degermed cornmeal, like Quaker yellow, has the germ removed. Its label lists the ingredient as degerminated yellow corn meal.
- Grind size. Fine, medium and coarse grinds pack differently. Coarse grinds like the ones sold for polenta or grits leave more air between particles.
- Packing. Scooping the cup through the bag presses meal in. Spooning it into the cup and leveling gives a lighter result.
- Brand. Even two products with the same name can differ. Quaker's own label lists a serving as 3 tablespoons at 27 g, which is about 9 g per tablespoon, a little under the 9.8 g from the King Arthur chart. Small differences like that are normal.
If a recipe was developed with one type and you use the other, the extra or missing grams change how much liquid the batter needs.
How to measure grams in a cup of cornmeal
- Check your bag. Is it whole grain or degermed? Fine or coarse? That tells you which column to use.
- If the recipe gives grams, set your bowl on the scale, press tare, and pour cornmeal in until you hit the number.
- If the recipe only gives cups, use the column that matches the recipe author's cornmeal if they say. If they don't, start with your own cornmeal's weight from the chart.
- Write the grams on the recipe once you've got a batch you like.
Weighing also saves you from washing a cup. Tare between the cornmeal and the flour and you can add both to the same bowl.
Using cornmeal weights in real recipes
- Cornbread and muffins. Many recipes mix cornmeal with flour. Weighing both keeps the ratio steady, and that ratio decides how crumbly or cakey the result is. Using King Arthur Baking's 120 g per cup of all purpose flour, a recipe with 1 cup of each is about 138 g whole grain cornmeal plus 120 g flour.
- Polenta and grits. These are cooked with a lot of liquid, so a few grams of difference is forgiving. Weighing still helps you repeat a texture you liked.
- Dusting pans and pizza peels. A tablespoon or two (8.6 to 9.8 g each) is plenty. Weighing isn't critical here, but it keeps you from wasting meal.
- Breading. A cornmeal crust on fish or vegetables usually mixes cornmeal with flour and seasoning. Weighing the mix lets you make it again exactly.
Common cornmeal measuring mistakes
- Assuming every cup weighs the same. Whole grain and degermed cornmeal differ by about 18 g per cup in the King Arthur chart.
- Swapping coarse polenta for fine cornmeal in baking. It changes both the weight per cup and the texture.
- Packing the cup. Spoon and level if you must use cups.
- Measuring small amounts with a cup. For a tablespoon or two, a spoon or scale is far more reliable.
A practical tip: for the small stuff, like a tablespoon of cornmeal to dust a pan or thicken a chili, a MeasureMate digital measuring spoon scoops and weighs in one step and reads in 0.1 g steps. For a full cup, pour onto a kitchen scale and use the tare button to zero your bowl first.
Quick questions
How many grams is 1/2 cup of cornmeal?
About 69 g for whole grain cornmeal or about 78 g for degermed yellow cornmeal like Quaker, based on King Arthur Baking.
How many grams of cornmeal are in a tablespoon?
About 8.6 to 9.8 g, depending on the type. Quaker's label lists 3 tablespoons at 27 g.
Is polenta the same as cornmeal by weight?
Not exactly. Polenta is usually a coarser grind, and coarse meal packs differently, so weigh it rather than assuming it matches a cornmeal chart.
Weights based on the King Arthur Baking ingredient weight chart and the Quaker Yellow Corn Meal package label.