Converter
Why corn syrup needs its own conversion
Corn Syrup weighs about 328g per cup — notably dense — closer to syrups than most dry ingredients. USDA 'corn syrup, light or dark' = 328 g/cup; King Arthur's chart lists 312 g/cup. CONFLICT — see flag. A cup is a unit of volume, so ingredients this different in density can't share one generic conversion factor — using a single "1 cup = X g" rule for everything will be wrong for at least some of what you cook.
Common measurement mistakes
- Using a generic cup-to-gram factor for every ingredient — corn syrup does not weigh the same per cup as most other ingredients.
- Measurement note: USDA 'corn syrup, light or dark' = 328 g/cup; King Arthur's chart lists 312 g/cup. CONFLICT — see flag.
- Confusing weight ounces with fluid ounces when a recipe lists "oz" — they are not interchangeable.
Frequently asked questions
How many grams are in a cup of corn syrup?
About 328g, uSDA 'corn syrup, light or dark' = 328 g/cup; King Arthur's chart lists 312 g/cup. CONFLICT — see flag.
Does this conversion work for every brand or variety of corn syrup?
It’s a close approximation based on USDA FoodData Central. Minor variations in moisture, grain, or brand can shift the exact weight slightly, but this figure works well for everyday cooking and baking.