Rice and Diabetes: Carbs, Glycemic Index and Portions
A cup of cooked white rice has about 45 g of carbohydrate (44 g net). Glycemic index: low to high (50 to 83). Yes, in measured portions. Rice is a carbohydrate food, so it belongs in the carbohydrate quarter of the plate.
Rice is a staple for many families, and it can stay on the table. The key is that it is almost all carbohydrate, so a heaping bowl is several servings in one. Measuring once with a cup shows you what a portion really looks like.
Different rices behave differently. Brown and parboiled rice usually have more fiber or slower digestion than a very sticky white rice, and the tables show a wide spread in glycemic index between varieties.
Carbs in rice by portion
| Portion | Grams | Carbs (g) | Fiber (g) | Net carbs (g) | Protein (g) |
|---|---|---|---|---|---|
| cup | 158 | 45 | 0.6 | 44 | 4.3 |
| 100 g (for comparing foods) | 100 | 28 | 0.4 | 28 | 2.7 |
Source: USDA FoodData Central, FDC ID 168878 (White rice, cooked). Net carbs here means carbohydrate minus fiber. “Net carbs” is not an FDA-defined term, so total carbs are shown too. Values are estimates for a typical item; brands, ripeness and size vary.
Glycemic index and glycemic load
GI ranks how fast a food raises blood glucose compared with pure glucose (100). Low is 55 or less, medium 56 to 69, high 70 or more. Jasmine, basmati, long-grain and sticky rice were all tested, which explains the range. Glycemic load multiplies the index by the available carbohydrate in a portion (carbs minus fiber), so it reflects how much you actually eat: low is 10 or less, medium 11 to 19, high 20 or more.
Which published values we used (5)
| Entry | Food as listed | GI |
|---|---|---|
| Suppl. Table 1, #574 | Basmati, white, polished, cooked 10 min | 50 |
| Suppl. Table 1, #579 | Basmati rice (Dreamrice, Singapore) | 60 |
| Suppl. Table 1, #651 | White rice, NS | 83 |
| Suppl. Table 1, #653 | White rice, Carnaroli, regular (Scotti, Italy) | 64 |
| Suppl. Table 1, #654 | White rice, Ponni, cooked in rice cooker for 33 min | 70 |
Atkinson FS et al. International tables of glycemic index and glycemic load values 2021. Am J Clin Nutr 2021;114(5):1625-1632. Glucose reference (glucose = 100); values from studies that used white bread were converted by the authors. Where studies differ we show the range, not an average.
Glycemic index is only one piece of the picture. The same food can give a different response depending on ripeness, cooking, what you eat it with and your own body, so your meter or CGM is the best guide.
How rice fit the plate method
Rice count toward the carbohydrate quarter of the plate in the plate method, along with grains, starchy vegetables, fruit and milk. The CDC describes the plate method as half non-starchy vegetables, a quarter protein and a quarter carbohydrate foods. See the diabetic meal plan guide for how it works, or drop rice onto a meal in the meal planner to watch the plate fill.
Portion ideas and pairings
- A third to a half cup cooked is a common starting portion.
- Fill the other half of the plate with vegetables first, then add rice.
- Fried rice and rice dishes with sauces add fat and sugar to the count.
Pairs well with: stir-fried vegetables, beans or lentils, grilled fish, chicken or tofu.
Related foods
Sweet potato
cup, cubes: 27 g carbs
Potato
Potato medium: 37 g carbs
Quinoa, cooked
cup: 39 g carbs
Corn, sweet
cup: 27 g carbs
See all foods and the low glycemic foods list
Frequently asked questions
Is brown rice better than white rice?
Brown rice has more fiber and some nutrients, but the carbohydrate is similar, so portion is still the main thing. Choose the one you will enjoy, and measure it.
How many carbs are in a cup of cooked white rice?
About 45 g of carbohydrate, of which about 0.6 g is fiber, so roughly 44 g net carbs. Values are from USDA FoodData Central for 158 g and are estimates; brands and sizes vary.
Information only, not medical advice. Your care team may set different targets for you, and only a lab test ordered by a clinician can diagnose diabetes or prediabetes. See our medical disclaimer.
Sources
- USDA FoodData Central: White rice, cooked (FDC ID 168878)
- Atkinson FS et al. International tables of glycemic index and glycemic load values 2021. Am J Clin Nutr 2021;114(5):1625-1632
- CDC: Diabetes Meal Planning (plate method and carbohydrate counting)
- ADA Standards of Care in Diabetes—2026, Section 5: Facilitating Positive Health Behaviors
Last reviewed: by the Diabetes Blogs editorial team. Information only, not medical advice.
