There are about 1.5 cups in a pound of corn syrup. A pound is 453.59 g, and one cup of corn syrup weighs 312 g when measured poured, so 453.59 divided by 312 gives 1.5 cups. The figure is approximate: cup weights vary with how the cup is filled, how settled the ingredient is, and the brand you buy, so if the recipe matters, weigh the corn syrup on a kitchen scale instead of counting cups. For everyday cooking, 1.5 cups per pound is the number to use.
Glucose syrup that stays liquid and prevents crystallisation. Candy, pecan pie filling, frostings and sauces. That is why the cup count for corn syrup is different from the cup count for other ingredients: a pound of flour fills nearly four cups, while a pound of honey fills fewer than one and a half, because a cup of honey weighs 336 g and a cup of corn syrup weighs 312 g. Weight is the same for every ingredient — a pound is always 453.59 g — but volume is not, and the cup count per pound is simply the pound divided by the weight of one cup.
Pounds to cups conversion table
The table below converts pounds of corn syrup to cups, using 312 g per cup (poured). Every figure is approximate, and the gram column is exact — a pound is 453.59 g whatever you are weighing.
| Weight | Cups (approx.) | Grams |
|---|---|---|
| 0.25 lb | 0.4 cups | 113.4 g |
| 0.5 lb | 0.7 cups | 226.79 g |
| 0.75 lb | 1.1 cups | 340.19 g |
| 1 lb | 1.5 cups | 453.59 g |
| 1.5 lb | 2.2 cups | 680.38 g |
| 2 lb | 2.9 cups | 907.18 g |
| 3 lb | 4.4 cups | 1360.77 g |
| 4 lb | 5.8 cups | 1814.36 g |
| 5 lb | 7.3 cups | 2267.95 g |
| 10 lb | 14.5 cups | 4535.9 g |
For the amounts most recipes use, the useful rows are the small ones: a quarter pound is 0.4 cups, half a pound is 0.7 cups, and three quarters of a pound is 1.1 cups. If your recipe is written in pounds and your measuring tools are cups, read the cups column; if your recipe is written in cups and you buy by the pound, read it the other way — a recipe that needs 2 cups takes 1.4 lb, and a recipe that needs 3 cups takes 2.1 lb.
Cups to grams and ounces
The table below works in the other direction: cups of corn syrup to grams and ounces. One cup is 312 g, which is 11 oz, and every other row is a multiple of that.
| Cups | Grams (approx.) | Ounces (approx.) |
|---|---|---|
| 1/4 cup | 78 g | 2.8 oz |
| 1/3 cup | 104 g | 3.7 oz |
| 1/2 cup | 156 g | 5.5 oz |
| 2/3 cup | 208 g | 7.3 oz |
| 3/4 cup | 234 g | 8.3 oz |
| 1 cup | 312 g | 11 oz |
| 2 cups | 624 g | 22 oz |
| 3 cups | 936 g | 33 oz |
| 4 cups | 1248 g | 44 oz |
These are the figures to write on a recipe card. A recipe that calls for 1/2 cup needs 156 g, a recipe that calls for 2 cups needs 624 g, and a recipe that calls for 4 cups needs 1248 g. Weighing removes the cup entirely: put the bowl on the scale, tare it, and pour until the display reads the gram figure. It is faster than measuring cups, it uses one less tool to wash, and it is the same every time, whatever brand of corn syrup you bought.
Worked examples
Gingerbread for the holidays
A batch of gingerbread dough uses 1/2 cup of corn syrup, which is 156 g — 0.3 lb. A pound of corn syrup holds 1.5 cups, so one pound covers 2.91 batches of gingerbread. The syrup is what gives gingerbread its dark colour and its chew, and it is also what makes the dough sticky: measure it in an oiled jug so it slides out cleanly, and warm it slightly so it mixes into the dough without streaks. Chill the dough for at least an hour before rolling it, because warm gingerbread dough spreads in the oven and the shapes lose their edges.
A salad dressing for the week
A jar of salad dressing for the week uses 2 tablespoons of corn syrup — 39 g — whisked with oil, vinegar and mustard. A pound of corn syrup is 1.5 cups, which is 23.26 tablespoons, so one pound makes 11.63 jars of dressing at this rate. That is the useful way to think about syrup in savoury cooking: it is measured in spoonfuls, not cups, and a single bottle lasts for months. Whisk the syrup with the vinegar and mustard first, then add the oil in a slow stream so the dressing emulsifies instead of separating into layers in the jar.
Sweetening a big pot of tea
A big pot of iced tea for a party needs about 1/4 cup of corn syrup, which is 78 g. A pound holds 1.5 cups, so one pound sweetens 5.82 pots. Stir the syrup into the tea while it is still hot — it dissolves instantly in hot liquid and barely at all in cold, and adding it to a cold jug leaves a sweet layer at the bottom and a weak tea on top. Taste before you add more: syrups taste sweeter than the same weight of sugar because they are already dissolved, so a quarter cup of syrup sweetens more than a quarter cup of granulated sugar.
How the figure is worked out
The calculation is a single division. A pound is defined as 453.59 g. One cup of corn syrup weighs 312 g, measured poured from a US cup of 236.6 ml, according to King Arthur Baking. Divide the pound by the cup weight — 453.59 divided by 312 — and the answer is 1.5 cups. There is no other step, and no other number involved, which is why the figure is easy to check: if you know the grams per cup, you know the cups per pound.
The cup weight itself is where the uncertainty lives. One cup of corn syrup weighs 312 g, measured poured from a US cup of 236.6 ml. The figure comes from King Arthur Baking and carries high confidence in our table. A cup is a volume, not a weight, so anything that changes how much of the ingredient fits in that volume changes the weight: how it is poured, its temperature, and how settled it is That is why this page labels every result approximate and why a scale is the only way to be certain.
The spoon measures follow from the same cup weight. A cup holds 16 tablespoons, so one tablespoon of corn syrup weighs 19.5 g, and one teaspoon weighs 6.5 g. The small table below gives the figures you will actually use when a recipe calls for spoonfuls rather than cups.
| Measure | Grams (approx.) |
|---|---|
| 1 teaspoon | 6.5 g |
| 1 tablespoon | 19.5 g |
| 2 tablespoons | 39 g |
| 1/4 cup | 78 g |
| 1/2 cup | 156 g |
| 1 cup | 312 g |
Practical guidance
Glucose syrup that stays liquid and prevents crystallisation. Candy, pecan pie filling, frostings and sauces. Airtight container at room temperature, up to 1 year.
The most common mistake with corn syrup is measuring it the wrong way for its form. Syrups must be measured in a liquid jug, not a dry cup, and read at eye level. A cup of corn syrup weighs 312 g, and because it is sticky, a spoonful left in the measure is a real loss — lightly oil the jug before pouring so the syrup slides out cleanly. Warm the syrup slightly if it pours slowly, and pour in a thin stream so you do not overshoot the line. Syrups are also hygroscopic, which means they attract moisture, so keep the bottle sealed and wipe the neck clean after pouring, or the cap will stick and the syrup will crystallise around the rim.
If you do not have a scale, the cup figures on this page will get you close enough for everyday cooking, but not for precision baking. A basic digital kitchen scale costs little, weighs in grams, and removes the single biggest source of variation in baking. Until you have one, spoon and level dry ingredients, use a liquid jug for liquids, and never scoop from the bag.
Frequently asked questions
How many cups are in a pound of corn syrup?
About 1.5 cups. A pound is 453.59 g, and one cup of corn syrup weighs 312 g, so 453.59 divided by 312 is 1.5. The figure is approximate, because the cup weight depends on how the cup is filled — poured gives 312 g; the weight is steadier than for dry ingredients, but temperature and how settled the contents are still shift it slightly.
How many grams are in a pound of corn syrup?
453.59 g. A pound is always 453.59 g whatever the ingredient is; what changes is how many cups that weight fills. For corn syrup, 453.59 g fills about 1.5 cups.
Is a pound of corn syrup the same as 2 cups?
No. A pound of corn syrup is about 1.5 cups, which is less than 2 cups. Two cups of corn syrup weigh 624 g, which is 1.4 lb — a little over a pound. Measuring by weight avoids the error entirely.
How do I measure corn syrup without losing some in the cup?
Lightly oil the measuring jug before you pour, and the syrup will slide out cleanly instead of clinging to the sides. A cup of corn syrup weighs 312 g, and a tablespoon left behind is 19.5 g — enough to matter in a small recipe. Weighing the jug on a scale avoids the problem entirely: tare the jug and pour to 312 g for a cup.
Is a pound of syrup the same volume as a pound of sugar?
No. A pound of corn syrup is only 1.5 cups, while a pound of granulated sugar is about 2.3 cups — syrup is far denser, so the same weight fills far less volume. That is why weight is the reliable unit for syrups: a cup of syrup weighs 312 g, nearly twice a cup of flour, and recipes written in cups hide that difference.
Can I swap corn syrup for sugar in a recipe?
Only with adjustments. Use about 3/4 cup of corn syrup for each cup of sugar, and reduce the other liquid in the recipe by about 3 tablespoons, because syrup adds moisture as well as sweetness. A pound of corn syrup is 1.5 cups, so a swap that needs 3/4 cup uses about half a pound. Baked goods made with syrup stay moist for longer but can sink if the liquid is not reduced.