How many carbs are in grapes?
Grapes has 27.3 g of total carbs per 1 cup (151 g) — about 25.9 g net carbs after 1.4 g of fiber. That's 18.1 g of carbs per 100 g, roughly 10% of the 275 g Daily Value.
USDA FoodData Central · raw · FDC 174683
Carbs by portion
| Portion | Total carbs | Net carbs | Fiber | Sugar | Calories |
|---|---|---|---|---|---|
| 1 cup (151 g) | 27.3 g | 25.9 g | 1.4 g | 23.4 g | 104 |
| 100 g | 18.1 g | 17.2 g | 0.9 g | 15.5 g | 69 |
| 1 oz (28 g) | 5.1 g | 4.8 g | 0.3 g | 4.4 g | 20 |
Net carbs = total carbs − fiber (the carbs that raise blood sugar, used in keto/low-carb tracking). Values computed from USDA per-100 g data (FDC 174683, SR Legacy). raw.
A cup of grapes is one of the more carb-dense snacks you can grab by the handful: about 27.3 g of total carbs in a 1-cup serving (151 g), which works out to about 25.9 g net carbs once you subtract the 1.4 g of fiber. That’s 18.1 g of carbs per 100 g, for roughly 104 calories a cup. The headline for anyone counting carbs is how little fiber is in the way — net carbs sit barely below the total, so almost every gram counts.
Why net carbs barely move the number
Net carbs — total carbs minus fiber — is the figure that matters for keto, low-carb and blood-sugar tracking, because fiber is the part your body doesn’t turn into glucose. With grapes there’s almost no fiber to subtract: a whole cup has only about 1.4 g, so the net carbs (~25.9 g) land right under the total. And the carbs themselves are overwhelmingly sugar — about 23.4 g per cup, roughly 85% of the total. It’s natural fruit sugar, but it digests fast and there’s no meaningful fiber to slow it down, which is exactly why grapes read as candy-sweet.
How a cup fits a daily budget
In practical terms, grapes are not a keto or low-carb food. At about 26 g net carbs, one cup can swallow most of a strict keto allowance (20–50 g net a day) before you’ve eaten anything else — and grapes are deceptively easy to overeat, since they vanish a few at a time. On a moderate-carb plan they’re fine as a portion-controlled treat: a small handful of ten grapes is only about 9 g of carbs. Grapes aren’t “bad,” they’re just dense in the one macro you’re usually counting, with no fiber to cushion it.
If you want the other side of the macro picture, see protein in grapes — and for any packaged grape product, always read the label’s own carb and fiber lines.
Frequently Asked Questions
How many carbs are in a cup of grapes?
About 27.3 g of total carbohydrate in a 1-cup serving (151 g), which is 18.1 g per 100 g (USDA FDC 174683). That cup is roughly 104 calories, and the carbs are almost all natural sugar.
What are the net carbs in grapes?
About 25.9 g net carbs per cup — total carbs (27.3 g) minus fiber (1.4 g). Grapes carry very little fiber, so net carbs land just under the total. There's no real fiber buffer to soften the hit to blood sugar.
How much of the carbs in grapes is sugar?
Most of it. A cup has about 23.4 g of sugar out of 27.3 g of total carbs — roughly 85%. It's natural fruit sugar (glucose and fructose), but to your blood sugar and your carb count, sugar is sugar.
Are grapes keto or low-carb?
No. At about 26 g net carbs, a single cup of grapes can use most or all of a strict keto budget (20–50 g net carbs a day), and they're easy to overeat by the handful. Grapes are a high-carb fruit — fine as energy, but not keto-friendly.
How many carbs are in 10 grapes?
Roughly 9 g of carbs. Ten medium grapes weigh around 50 g, so they carry about 9 g of total carbs (about 8.6 g net, ~7.8 g sugar). It's a smaller hit than a full cup, but grapes are dense enough that small handfuls add up fast.
When was this data last verified?
2026-06-04, against USDA FoodData Central FDC 174683 (Grapes, red or green (European type, such as Thompson seedless), raw; SR Legacy). We re-verify reference pages periodically.
Whole-food values are USDA reference data, not a Labelgrade (that score is for branded packaged products). See our methodology and the macro calculator to turn this into a daily target.