How Many Grams in a Cup of Cornmeal? 138 Grams, With a Grind Caveat

Guides · Updated October 2026

The batter was already in the bowl when I realized the recipe said cups and my scale said grams, and the bag in my hand said nothing useful at all. That is how most cornmeal questions start, halfway through a cornbread recipe, with a cup measure in one hand and a phone in the other. How many grams in a cup of cornmeal? About 138 grams, for fine or medium grind cornmeal in a US cup. That is the number to write on the recipe card. The rest of this article is the caveat that keeps the 138 honest, because cornmeal is one of the ingredients where the grind changes the answer, and pretending otherwise is how a second batch comes out drier than the first.

The 138 gram figure is the standard reference value for yellow cornmeal, and it assumes a US customary cup of 236.6 milliliters, spooned and leveled rather than scooped from the bag. Scooping packs the meal down and can add 10 percent or more, which is the same trap as flour, just less famous. If you scoop, your cup might weigh 150 grams or more, and your cornbread will be the denser for it. Spoon the meal into the cup, level it with a knife, and you land near 138. Weigh it once, and you never have to argue with the cup again.

Grind is the real variable. Fine cornmeal, the kind sold for most cornbread and muffins, and medium grind both sit close to 138 grams per cup. Coarse stone ground cornmeal, the kind with visible grit that makes a heartier bread and a crunchier crust, packs a little denser in the cup and can run 140 to 150 grams per cup depending on the mill. The difference is not huge, but it is real, and it explains why charts disagree. One chart measured fine cornmeal spooned and leveled. Another measured coarse cornmeal scooped from the bag. Both charts are honest. Neither number is universal. If your bag says stone ground and coarse, weigh it and use your own number, not a chart's.

How many grams in a cup of cornmeal versus other corn products?

Do not swap corn products by cup and expect the same result. Cornmeal, corn flour, masa harina, and cornstarch are different grinds, different treatments, and different weights per cup, and they behave differently with liquid. Masa harina is nixtamalized, which changes its absorption completely. Cornstarch is a pure starch, not a meal. A recipe written for cornmeal will not work with masa harina at the same cup measure, and it will not work with corn flour either, because the grind changes how much liquid the batter needs and how the crumb sets. If a recipe names a specific product, buy that product, and weigh it at its own figure.

For cornbread specifically, the ratio matters more than the exact gram count. A typical skillet cornbread uses about 2 cups of cornmeal, 276 grams, against about 1 cup of flour and 1 to 1.5 cups of liquid. If your cornmeal weighs 150 grams per cup because you scooped coarse meal, you have added 24 grams of dry meal to the batter without adding liquid, and the bread comes out dry and crumbly. If you spooned fine meal at 138, the ratio holds. That is why I weigh cornmeal for baking and measure it in cups only for dusting, where a few grams on a pizza peel or a bread pan cannot hurt anything.

One practical tip from the batter bowl: when you convert a recipe to grams, write the grams on the card next to the cups, and note the grind. "2 cups cornmeal, 276g, medium grind" is a recipe you can repeat. "2 cups cornmeal" is a recipe you have to re-derive every time, and every re-derivation is a chance to scoop instead of spoon. The scale takes ten seconds. The second batch that comes out right is the payoff.

Frequently asked questions

Related: How Many Grams in a Cup of Flour? · The Spoon-and-Level Method: Measuring Flour · Cups to Grams Conversion Chart for Baking

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