Pantry Staples
Cornmeal Conversion
Cornmeal weighs 138g per US cup.
| Amount | Grams | Ounces |
|---|---|---|
| 1 cup | 138.0 g | 4.87 oz |
| 1/2 cup | 69.0 g | 2.43 oz |
| 1/4 cup | 34.5 g | 1.22 oz |
| 1 tbsp | 8.6 g | 0.30 oz |
| 1 tsp | 2.9 g | 0.10 oz |
| 100 g | 100.0 g | 3.53 oz |
Need a different amount? Use the full Ingredient Converter tool.
Cornmeal weighs 138 grams per cup, one of the heavier grain products on this site, reflecting its coarser, grittier grind compared to the fine flours around it — cornmeal is dried corn ground to a range of textures from fine to coarse, most commonly landing in a medium grind for classic cornbread.
Cornmeal and corn flour aren't the same product despite the overlapping name confusion: corn flour is ground much finer, closer to wheat flour's texture, while cornmeal keeps a distinctly gritty bite that's part of cornbread and polenta's characteristic texture — using one where a recipe calls for the other changes the final texture noticeably.
Cornmeal's grind size also matters for its intended use — coarse cornmeal (often labeled "polenta" specifically) needs a longer cook time to soften fully in a wet application like polenta or grits, while fine cornmeal cooks faster and blends more smoothly into a batter, which is why a recipe's specified grind is worth paying attention to rather than treating all cornmeal as interchangeable.
Cornmeal's 138g-per-cup weight reflects its coarser, grittier particle structure compared to a fine flour — that grit is the entire point in cornbread and polenta, where cornmeal's texture is meant to remain perceptible rather than dissolve smoothly the way a wheat flour would, and swapping fine cornmeal for coarse (or the reverse) noticeably changes a finished dish's texture even at an identical weight.
Cornmeal is milled at several different grinds — fine, medium, and coarse — and a recipe written for one grind can turn out gritty or unexpectedly smooth if a different grind is substituted, a genuine variable this site's single weight figure doesn't capture on its own.
Yellow and white cornmeal are simply different corn varieties and taste nearly identical, the color difference coming from the corn itself rather than processing.
Storing it in the fridge or freezer extends its shelf life meaningfully, since its germ content makes it more prone to rancidity than a refined flour.
Frequently asked questions
Is cornmeal the same as corn flour?
No, the two are milled to very different finenesses — corn flour comes out powder-fine, close to the texture of wheat flour, whereas cornmeal keeps a coarser, grittier bite; swapping one for the other changes a recipe like cornbread more than the shared "corn" name suggests it would.
Does the grind size of cornmeal matter for a recipe?
Yes, meaningfully — coarser cornmeal (the kind often labeled polenta) takes longer at a simmer to fully soften, and a finer grind cooks down faster and folds into a batter with a smoother finish; picking the wrong grind leaves a finished dish grittier or mushier than the recipe intended.
Is yellow cornmeal different from white cornmeal in this conversion?
The weight-per-cup figure applies to either — the color difference comes from the corn variety used, not from a different grind or density, so this site's figure works for both yellow and white cornmeal.
Is cornmeal gluten-free?
Yes, corn itself contains no gluten, making cornmeal naturally gluten-free — a shared mill can still introduce trace wheat, though, so anyone with celiac disease should stick to a bag specifically certified gluten-free rather than assuming any plain cornmeal is automatically safe.
Can I substitute cornmeal for cornstarch in a recipe?
No — despite the similar name, they're entirely different products; cornstarch is a smooth, pure starch used as a thickener, while cornmeal is a coarse, gritty ground grain used for texture and structure, and the two don't perform the same role in a recipe at all.