A thick, mild liquid sweetener used to add moisture and prevent sugar crystallization. One US cup weighs about 328g — about 2.6× heavier than a cup of all-purpose flour.
Corn syrup is preselected below — just enter an amount.
The most commonly searched gram amounts, converted to cups automatically.
| Grams | Cups |
|---|---|
| 25g | 0.08 cups |
| 50g | 0.15 cups |
| 75g | 0.23 cups≈ ¼ cup |
| 100g | 0.30 cups≈ ⅓ cup |
| 125g | 0.38 cups≈ ⅓ cup |
| 150g | 0.46 cups≈ ½ cup |
| 200g | 0.61 cups≈ ⅔ cup |
| 250g | 0.76 cups≈ ¾ cup |
| 300g | 0.91 cups |
| 500g | 1.52 cups≈ 1 ½ cups |
| 1000g | 3.05 cups≈ 3 cups |
A thick, mild liquid sweetener used to add moisture and prevent sugar crystallization. It's also commonly labeled "glucose syrup".
Corn syrup belongs to the Sugars group on GramToCup, alongside other ingredients measured the same way in most kitchens. It shows up most often in pecan pie, candy making, preventing sugar crystallization. Its density of 328g per US cup is what this calculator uses to convert between grams and cups automatically — no manual lookup required.
Corn syrup is a thick, viscous liquid with almost no trapped air and a high concentration of dissolved sugars or solids, which is why it's one of the heaviest common ingredients by volume.
A cup of corn syrup is about 2.6× heavier than a cup of all-purpose flour (125g/cup), even though both fill the same 1-cup measuring cup.
Common mistake: Forgetting to grease the cup first, so a noticeable amount sticks to the sides and never makes it into the bowl.
Lightly grease the measuring cup or spoon before adding corn syrup. It pours out cleanly instead of leaving a sticky residue behind, which is where most of the measurement error creeps in.
When a recipe needs to be exact, weigh it on a kitchen scale instead of using a measuring cup at all — it removes packing and settling from the equation entirely.
Measure corn syrup on a flat surface and check the line at eye level; tilting the cup to read it from above is a common source of error.
100g of corn syrup is approximately 0.30 cups, based on a density of 328g per US cup.
1 US cup of corn syrup weighs about 328g. Use the calculator above to convert any other amount instantly.
Yes — "glucose syrup" is another common name for corn syrup. The density and conversion values on this page apply either way.
Because cups measure volume and grams measure weight. A cup of corn syrup is about 2.6× heavier than a cup of all-purpose flour (125g/cup) because the two ingredients have different densities — see the density explanation above for why.
Lightly grease the measuring cup or spoon before adding corn syrup. It pours out cleanly instead of leaving a sticky residue behind, which is where most of the measurement error creeps in.
They're in the same category, but check the density first: Granulated sugar weighs 200g per cup versus 328g for corn syrup. Substituting by weight (grams) keeps a recipe accurate; substituting cup-for-cup can change the result if the densities differ much.