Sushi and Diabetes: Carbs, Glycemic Index and Portions

By the Diabetes Blogs editorial teamLast reviewed October 22, 2026

One California roll has about 28 g of carbohydrate (26 g net). Glycemic index: low (45 to 48). Yes, in measured portions. The rice is the carbohydrate, so rolls add up quickly.

Sushi rice is seasoned with sugar, and a roll has a good amount of it. Rolls with tempura, sweet sauces or cream cheese add more fat and sugar.

Sashimi and nigiri with a small amount of rice, vegetable rolls, and edamame or miso soup on the side let you enjoy the meal with less rice. Soy sauce adds sodium, so a small dish goes a long way.

Carbs in sushi by portion

Nutrients for Sushi roll, California by portion
Portion	Grams	Carbs (g)	Fiber (g)	Net carbs (g)	Protein (g)
1 roll, 6 to 8 pieces	150	28	1.5	26	4.4
4 pieces	90	17	0.9	16	2.6
100 g (for comparing foods)	100	18	1	17	2.9

Source: USDA FoodData Central, FDC ID 2708961 (Sushi roll, California). 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

Glycemic index45 to 48Low

Glycemic load, one California roll12 to 13Medium GL

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. The tables list sushi with salmon and with brown rice. 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 (2)

Entry	Food as listed	GI
Suppl. Table 1, #2049	Sushi, brown rice, vegetable and tofu	45
Suppl. Table 1, #2050	Sushi, salmon ('I Love Sushi', Sydney, Australia)	48

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 sushi fit the plate method

Sushi 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 sushi onto a meal in the meal planner to watch the plate fill.

Portion ideas and pairings

One roll with a side of vegetables or salad.
Choose sashimi to skip the rice.
Brown-rice rolls have more fiber but still count.

Pairs well with: edamame, miso soup or a seaweed salad, cucumber salad.

Related foods

Sweet potato

cup, cubes: 27 g carbs

Potato

Potato medium: 37 g carbs

White rice, cooked

cup: 45 g carbs

Quinoa, cooked

cup: 39 g carbs

See all foods and the low glycemic foods list

Frequently asked questions

Is sushi OK for diabetes?

Yes, in measured portions. Count the rice, watch tempura and sweet sauces, and pick vegetables on the side.

How many carbs are in one California roll?

About 28 g of carbohydrate, of which about 1.5 g is fiber, so roughly 26 g net carbs. Values are from USDA FoodData Central for 150 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

Last reviewed: October 22, 2026 by the Diabetes Blogs editorial team. Information only, not medical advice.