Convert Corn Syrup — Cups, Grams & Ounces
1 cup of corn syrup weighs about 328 g. Most people arrive here holding a packet, so the chart below runs from grams to cups: 100 g is about 1/3 cup, and 340 g is about 1 cup.
💡 Tip: Oil the measuring cup first so corn syrup pours out cleanly. Light corn syrup is mild; dark has a deeper, molasses-like flavour.
Converting grams of corn syrup back to cups
| Grams | Amount | Ounces |
|---|---|---|
| 15 | 2 1/4 tsp | 0.53 |
| 20 | 1 tbsp | 0.71 |
| 30 | 1 1/2 tbsp | 1.06 |
| 50 | 2 1/2 tbsp | 1.76 |
| 100 | 1/3 cup | 3.53 |
| 150 | 1/2 cup | 5.29 |
| 200 | 5/8 cup | 7.05 |
| 250 | 3/4 cup | 8.82 |
| 300 | 7/8 cup | 10.6 |
| 340 | 1 cup | 12 |
| 450 | 1 3/8 cups | 15.9 |
Measuring corn syrup cleanly and light vs dark
Corn syrup is dense and very sticky — a cup weighs about 328 g (11.6 oz), with each tablespoon near 20.5 g. Lightly oil or spray the measuring cup first and it slides out without clinging to the sides. Light corn syrup is mild and nearly clear; dark corn syrup has caramel and refiners' molasses added for a deeper colour and flavour. It's prized in candy, pecan pie and frostings because it's an invert syrup that resists crystallising, keeping fudge and caramel smooth. A common US bottle is 16 fl oz, roughly 2 cups.
How many grams in a cup of corn syrup?
| Cups | Grams | Ounces |
|---|---|---|
| 1/8 | 41 | 1.45 |
| 1/4 | 82 | 2.89 |
| 1/3 | 109 | 3.86 |
| 1/2 | 164 | 5.78 |
| 2/3 | 219 | 7.71 |
| 3/4 | 246 | 8.68 |
| 1 | 328 | 11.6 |
| 1 1/2 | 492 | 17.4 |
Spoon reference: 1 tablespoon ≈ 20.5 g, 1 teaspoon ≈ 6.83 g.
Is corn syrup heavy or light for its category?
A cup of corn syrup weighs 328 g, which puts it 7th by weight among the 10 syrups & spreads on this site. Its nearest neighbours are maple syrup at 322 g and agave syrup at 330 g per cup.
Swapping these by the cupful is not like-for-like. A cup of agave syrup in place of corn syrup puts roughly 2 g more in the bowl, so match the grams rather than the cups.
Common questions about measuring corn syrup
- How many grams is a tablespoon of corn syrup?
- 1 tablespoon of corn syrup is about 20.5 grams (a teaspoon is roughly 6.83 g).
- How many grams is 2 cups of corn syrup?
- About 656 g, since one cup is roughly 328 g.
- How many cups is 150g of corn syrup?
- About ½ cup.
- What's the difference between light and dark corn syrup?
- Light is mild and almost clear; dark has caramel and molasses added for a stronger flavour and colour. They can usually be swapped, with a flavour change.
- Can I substitute corn syrup with another syrup?
- For texture, golden syrup, glucose syrup or honey work in many recipes; results vary in candy-making where corn syrup's anti-crystallising action matters.
- How do I keep corn syrup from sticking to the cup?
- Oil or spray the measuring cup first, or warm the syrup slightly, so it pours out cleanly.
- How many grams is 1 cup of corn syrup?
- Reckon on 328 grams per US cup of corn syrup — about 11.6 ounces.
- How many grams is ¼ cup of corn syrup?
- 82 grams, a quarter of the 328 g in a full cup.
- How many ounces is 1 cup of corn syrup?
- 1 cup of corn syrup is about 11.6 ounces by weight (328 g).