One cup of cooked white rice contains about 45 grams of carbohydrates. That number stays remarkably consistent across most rice varieties, though fiber content, glycemic impact, and serving size all shift depending on the type you choose.
Carbs by Rice Variety
The total carbohydrate count for a cup of cooked rice falls in a tighter range than most people expect. Long-grain white rice has 44.5 grams of carbs per cup, while long-grain brown rice is nearly identical at 44.8 grams. The real difference between them is fiber: white rice delivers less than 1 gram per cup, while brown rice provides 3.5 grams. That extra fiber slows digestion and reduces the “net carbs” (total carbs minus fiber) from roughly 44 grams in white rice to about 41 grams in brown.
Wild rice is the lowest-carb option at 35 grams per cooked cup, with nearly 3 grams of fiber and 6.5 grams of protein, roughly double the protein of white rice. Black rice (sometimes called forbidden rice) is higher in carbs, with 38 grams in just half a cup cooked, plus 3 grams of fiber. It also contains the same pigment compounds found in blueberries, which act as antioxidants.
Here’s a quick comparison per one cup cooked (half cup for black rice):
- White rice: 44.5 g carbs, 0.6 g fiber
- Brown rice: 44.8 g carbs, 3.5 g fiber
- Wild rice: 35 g carbs, 3 g fiber
- Black rice (½ cup): 38 g carbs, 3 g fiber
How Rice Affects Blood Sugar
Total carbs only tell part of the story. The glycemic index (GI) measures how quickly a food raises blood sugar on a scale of 0 to 100, and rice varieties differ meaningfully here. White rice scores around 73, placing it in the high-GI category. Brown rice comes in at about 68, which is considered medium-GI. That five-point gap comes from the bran layer that brown rice retains, which slows the breakdown of starch during digestion.
Jasmine rice tends to land on the higher end of the GI scale, while basmati rice is often lower, though exact values depend on the brand and how long the rice is cooked. Overcooking any rice breaks down its starch further, making it digest faster and spike blood sugar more sharply. Cooking rice al dente, just until tender, keeps the GI slightly lower.
Cooling Rice Changes Its Carbs
Something interesting happens when you refrigerate cooked rice. As it cools, some of its digestible starch converts into resistant starch, a type of carbohydrate your body can’t fully break down. Freshly cooked white rice contains about 0.64 grams of resistant starch per 100 grams. After cooling in the refrigerator for 24 hours, that number jumps to 1.65 grams, more than doubling.
Resistant starch acts more like fiber than a typical carbohydrate. It passes through the small intestine largely undigested, feeding beneficial gut bacteria and producing a smaller blood sugar response. The effect holds even after reheating, so cooking rice ahead of time and warming it up later gives you a slightly lower glycemic impact than eating it fresh off the stove. The total carb count on a nutrition label stays the same, but your body processes fewer of those carbs as sugar.
What Counts as One Serving
A full cup of cooked rice is actually quite generous. The CDC defines one “carbohydrate choice” for blood sugar management as 15 grams of carbs, which corresponds to just one-third of a cup of cooked rice. That’s about the size of a tennis ball. If you’re tracking carbs for any reason, it helps to know that the heaping portion you get at a restaurant is typically two to three cups, meaning 90 to 135 grams of carbs in rice alone.
Measuring cooked rice rather than dry matters, too. Dry rice roughly triples in volume when cooked, so one-third cup dry becomes about one cup cooked. If a recipe calls for one cup of dry rice, you’re looking at roughly three cups cooked and about 135 grams of total carbs for the entire batch.
Reducing the Carb Impact
You can’t remove carbs from rice, but you can blunt their effect. Pairing rice with protein, fat, or fiber-rich vegetables slows digestion and flattens the blood sugar curve. A bowl of rice with grilled chicken and roasted broccoli produces a very different glucose response than the same amount of plain rice eaten alone.
Choosing brown or wild rice adds fiber, which both slows absorption and increases satiety. Cooking rice a day ahead and reheating it boosts resistant starch. And simply keeping portions closer to that one-third cup benchmark, using rice as a side rather than a base, keeps total carb intake in a more moderate range. If you’re substituting for lower-carb options, cauliflower rice contains about 5 grams of carbs per cup, roughly one-ninth of what you’d get from white rice.