Quinoa vs rice: carbs, fiber and net carbs

Per 3.5 oz (100 g), quinoa has 21.3 g of carbohydrate (18.5 g net) and rice has 28.2 g (27.8 g net).

Net carbs per 3.5 oz (100 g)

Net carbs = total carbohydrate minus fiber.

	Quinoa	Rice
Total carbohydrate, 100 g	21.3 g	28.2 g
Fiber, 100 g	2.8 g	0.4 g
Net carbs, 100 g	18.5 g	27.8 g
Total sugars, 100 g	0.87 g	0.05 g
Carbs per serving	39.4 g in 1 cup (6.5 oz, 185 g)	44.5 g in 1 cup (5.6 oz, 158 g)
Net carbs per serving	34.2 g	43.9 g

Net carbs is total carbohydrate minus fiber; it is a common counting convention, not an FDA label term. Total sugars include natural and added sugar; USDA does not separate them for these foods.

What the numbers don't tell you

Per cup cooked, quinoa has a few more calories than white rice, about 222 against 205, with about twice the protein and eight times the fiber. On weight it does not win. Two meta-analyses of quinoa trials disagree, 2.8 lb (1.26 kg) lost against no change. In a 4-week trial in adults with overweight, weight fell significantly on 40 g a day of rice and not on quinoa. In preload tests, eating quinoa instead of rice did not cut how much people ate overall.

Rice has two questions the table hides. Observational data tie each daily serving of white rice to 11 percent more type 2 diabetes, with the link clear in Asian populations and not significant in Western ones. Its glycemic index runs from 48 to 93 by variety. Then arsenic. After six months on a gluten-free diet, children with celiac disease had four times the arsenic in their urine. We hold no arsenic data for quinoa.

If rice is your daily staple, rinse it. In 15 lab studies rinsing removed the most arsenic. Do not leave cooked rice at room temperature, since its bacteria can make a toxin that brief reheating does not destroy. Gluten free, quinoa is one way to vary the grain, and 50 g a day was well tolerated by 19 adults with celiac disease for six weeks.

A glycemic index is how fast a food raises blood sugar against pure glucose at 100. For rice it runs from 48 to 93 by variety. Brown rice beat white only when both were cooked for the same time, and at the longer times brown rice usually needs the difference shrank. A cup of cooked rice also varies in weight with the water used, as FDA notes for labels.

Evidence behind this note

Level A A meta-analysis of 7 randomized trials in 258 adults found 0.53 to 1.8 oz (15 to 50 g) of quinoa a day for 28 to 180 days did not change BMI or body weight versus placebo. Curr Med Chem, 2024
Level A A meta-analysis of 5 RCTs with 206 adults found quinoa seed lowered body weight by 2.8 lb (1.26 kg) and waist by 0.45 in (1.15 cm). Phytother Res, 2021
Level B In a 4-week RCT in 148 adults with overweight or obesity, 1.4 oz (40 g) of quinoa a day did not reduce weight significantly, while rice, bulgur and buckwheat groups did. Metabolites. 2026;16(9):628. Comparative Effects of Quinoa, Buckwheat, Bulgur, and Rice on Cardiometabolic Health in Adults with Overweight or Obesity
Level C In preload tests, quinoa scored as more satiating than rice, yet people did not eat less energy in total afterward. Berti C, et al. Br J Nutr. 2005;94(5):850-858
Level B Each extra daily serving of white rice went with an 11 percent higher rate of type 2 diabetes across seven cohorts, and the trend was linear rather than a threshold. Hu et al., BMJ, 2012
Level C Cohort data link the highest white rice intake to a 55 percent higher risk of type 2 diabetes in Asian populations, with no significant link in Western populations. BMJ, 2012
Level A A systematic review found the glycemic index of rice varieties ranged from 48 to 93, with brown rice lower than white only when both are cooked for the same time. Br J Nutr, 2015
Level D Laboratory data across 15 studies suggest cooking lowers arsenic in rice by about 0.04 mg/kg, with rinsing and parboiling the most effective methods. Int J Environ Health Res, 2024
Level C Children who went gluten free after a celiac diagnosis had four times more arsenic in their urine six months later, because rice is what replaces wheat. American Journal of Gastroenterology, 2025
Level C In 19 treated celiac patients, 1.8 oz (50 g) of quinoa a day for 6 weeks was well tolerated and did not worsen the disease. Am J Gastroenterol, 2014
Level E CDC notes that B. cereus is often present in uncooked rice and its spores may survive cooking. If cooked rice is then held at room temperature, the bacteria multiply and make a heat-stable toxin that can survive brief heating such as stir frying. In a 1993 fried rice outbreak at two day care centers, 12 of the 14 cases were children aged 2.5 to 5 years. CDC, MMWR 1994, Bacillus cereus food poisoning associated with fried rice at two child day care centers
Level E A cup of cooked rice is not a fixed amount of food, and US labeling rules say so outright: the weight depends on how much water went in. Food Labeling: Serving Sizes of Foods That Can Reasonably Be Consumed At One Eating Occasion, FDA, FR Doc. 2016-11865

Written from the studies and agency guidance we hold for both foods, reviewed by the Bioma editorial system. How we verify.

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What the studies say

Is quinoa good for weight loss? Two reviews disagree, and the effect is small at best

Rankings and guides

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Where the numbers come from

Quinoa: USDA FoodData Central, Quinoa, cooked, FDC ID 168917 · full profile · all forms of quinoa
Rice: USDA FoodData Central, Rice, white, long-grain, regular, enriched, cooked, FDC ID 168878 · full profile · all forms of rice

Each food is one USDA entry, chosen as it is usually eaten. Other cuts, brands and preparations differ; the links show them. % DV uses FDA Daily Values for adults. How we verify.