How Many Calories in Shirataki Rice? The Full Nutrition

A standard drained 3 oz portion of this konjac-based food delivers only 5 to 15 calories.5 oz (100 g) serving, depending on brand and how thoroughly the packing liquid is drained off. A US 4 oz pouch lands in the same range, with 0 g of net carbs because the kernels are roughly 97% water and 3% glucomannan fiber, a soluble fiber the body cannot break down into sugar. The “near zero” claim printed on the bag is grounded in that fiber chemistry, not marketing.

This practical walkthrough covers what shirataki rice actually is, the exact calorie and net-carb counts across brands, and how the glucomannan fiber keeps the numbers so low compared with white and brown rice.

What Shirataki Rice Actually Is and Why It Looks So Different

Shirataki rice starts as a konjac root, a tuber grown across East Asia and ground into a fine flour called konjac glucomannan. That flour mixes with water and a little calcium hydroxide, then extrudes through small holes to form rice-grain shapes. The result is a translucent, gelatinous kernel that looks nothing like a real grain, which is where most of the “wait, is this actually rice?” confusion starts.

The Composition That Explains Every Number

Each kernel runs roughly 97% water and 3% soluble fiber, so the bag feels liquid-heavy the moment you open it. The fiber in question is glucomannan, a viscous soluble fiber that swells in water and resists digestion in the small intestine. Because there is no starch, no sugar, and no measurable fat, the macronutrient profile is essentially water plus fiber. Net carbs land at or near 0 g, protein is 0 g, and fat is 0 g per serving.

That composition is why the package claim of “almost zero calories” is not marketing trickery. There is simply nothing inside the kernel for your body to break down into energy except a trace of glucomannan the gut barely metabolizes. Understanding this sets up every calorie and carb figure that follows, because the math starts from a 97% water base rather than a grain base.

The Exact Calorie and Carb Count Per Serving

A drained 3.5 oz (100 g) serving of plain shirataki rice contains roughly 5 to 10 calories, depending on the US brand and how well the packing liquid drains off. A standard drained 4 oz (113 g) pouch, the way most Americans portion it at home, lands between 5 and 15 total calories. Net carbohydrates sit at or near 0 g per serving because glucomannan is not digested as a usable sugar.

Reading the Label the Right Way

Most US packages print nutrition facts based on the drained weight, not the bag-plus-liquid weight. Ignore the liquid in the package, rinse the kernels under cold water, then weigh or measure. A single drained 4 oz pouch is close to a generous cup-and-a-half serving, plenty for one person as a rice substitute in a stir-fry or bowl.

Fat and protein are both essentially 0 g, so the calories come from a trace of soluble fiber the body barely metabolizes. A typical 4 oz drained serving delivers around 1 to 3 g of glucomannan fiber, which is also why the small calorie number is not literally zero. The fiber itself carries a small energy value, just a much smaller one than starch does.

How Shirataki Rice Stacks Up Against White and Brown Rice

Cooked white rice delivers about 130 calories and 28 g of carbs per 100 g, and a single cup of cooked white rice lands near 200 calories with 45 g of carbs. Cooked brown rice sits closer to 110 calories and 23 g of carbs per 100 g, still a steep jump from shirataki’s near-zero profile. A single cup-for-cup swap from white to shirataki saves roughly 200 calories and 45 g of carbs, a meaningful margin for daily macro budgets.

What Shirataki Does Not Provide

That same 100 g comparison exposes a clear gap in protein, fiber, and fat where shirataki falls short. White rice offers a small amount of B vitamins like thiamine and niacin from enrichment, and brown rice adds magnesium, selenium, and a gram or two of protein per cooked cup. Shirataki contributes none of those, so it works as a low-calorie base but not as a standalone nutritional source. Pair it with eggs, tofu, chicken, or vegetables that carry the micronutrients the bowl is missing.

For strict keto or very-low-carb meal plans, shirataki is a closer fit than cauliflower rice because the net carb count is genuinely zero. For a more micronutrient-rich bowl, cauliflower rice edges ahead with vitamin C and a touch of protein. Plain white rice is the worst fit for calorie or carb budgets, even though it remains the easiest to cook and the most familiar on the palate.

Those gaps raise an obvious question about what, exactly, makes shirataki behave so differently in the body.

The Glucomannan Science Behind Near-Zero Calories

Glucomannan passes through the stomach and small intestine largely intact because human enzymes cannot break it down into absorbable sugars. That single fact explains why a bowl of shirataki rice delivers so few usable calories. Your body has no native tool for cleaving the long-chain glucose-mannose backbone of this fiber, so most of it reaches the colon untouched and exits as bulk.

Why the FDA Allows a Small Number, Not Zero

Soluble fibers like glucomannan still carry a small caloric value because some fermentation happens in the colon and some short-chain fatty acids get absorbed. The FDA assigns soluble fibers roughly 2 calories per gram, which is the number on the nutrition label for the 1 to 3 g of glucomannan in a serving. Most of the weight in a shirataki rice serving is water, and water contributes zero calories by definition, so the math genuinely lands between 5 and 15 calories once the liquid is drained.

That is also why shirataki carries a very low glycemic index, because there is no starch to spike blood sugar in the first place. For people managing diabetes or following a low-glycemic eating pattern, that zero-starch profile is the real reason shirataki earns a spot on the plate, even more than the calorie savings alone.

Tofu Shirataki Rice, Miracle Rice, and Other US Brand Variants

Plain shirataki rice stays in the 5 to 15 calorie range, while tofu-blended versions add soy protein and roughly 30 to 50 calories per serving. The added tofu shifts the protein from 0 g to about 2 to 3 g per serving, which is useful if you want a more filling bowl without leaving the shirataki category. Net carbs hold near 0 g across all plain and tofu variants, keeping every option friendly to strict keto macro targets.

Common US Brands and Their Numbers

Miracle Rice and Miracle Noodle label their plain rice at 5 calories per 100 g drained, matching the category standard. NASOYA’s Skinny Shirataki tofu-rice blend runs closer to 40 calories per 4 oz drained serving because of the added soy, and Better Than Foods’ plain rice sits in the same low single-digit range as Miracle Noodle. The brand you pick rarely changes the calorie count by more than 5 to 10 calories in the plain category.

Some pre-seasoned or ready-to-eat shirataki rice cups include added sauces or oils that can push totals to 40 to 80 calories per container, so reading the label matters in that aisle. A cup labeled teriyaki or garlic butter usually carries 2 to 6 g of net carbs from the sauce, which can still fit a keto plan but no longer qualifies as “near zero.”

The sauce problem is just one of several real-world trade-offs that show up once you actually start cooking with it.

Keto Fit, Digestive Trade-Offs, and Prep Tips That Fix the Texture

On a standard 20 g daily net-carb target, a full shirataki rice serving uses less than 1% of the budget, leaving plenty of room for fats and proteins elsewhere. A bowl built around 6 oz of cooked chicken, 1 cup of shirataki, and a tablespoon of butter lands around 350 calories with under 2 g of net carbs. For calorie-counters, the same bowl swaps 200+ calories out of the day compared to a white-rice version.

The Honest Digestive Trade-Off

Glucomannan can cause bloating or gas in first-time users, especially when eaten in large portions on an empty stomach. Start with half a serving, about 2 oz drained, for the first two or three tries, and drink a glass of water alongside the meal. The fiber pulls water into the gut as it moves through, so pairing it with fluids keeps things moving instead of sitting and fermenting.

Prep Method That Removes the Fishy Smell

The number-one complaint about shirataki is the faint konjac odor that comes through when the rice is reheated straight from the bag. The fix takes about five minutes:

• ▸Rinse under cold water for 60 seconds. This washes off the packing liquid that carries most of the smell.
• ▸Pat dry in a clean towel. Less surface water means better browning in the next step.
• ▸Dry-roast in a hot pan for 3 to 5 minutes. Use medium-high heat, no oil yet, and stir so the kernels dry out evenly.
• ▸Add fat and seasoning after roasting. Butter, sesame oil, soy sauce, garlic, parmesan, or chili crisp all work without adding meaningful calories.

Skipping the dry-roast step is the most common reason people give up on shirataki after one try. The neutral base is a feature, not a flaw, because it absorbs whatever flavor you cook into it. A well-roasted bowl with soy sauce and a fried egg on top tastes closer to a takeout rice bowl than the limp, faintly fishy version that turned you off the first time.

Bottom Line

Shirataki rice delivers 5 to 15 calories per standard US serving with effectively zero net carbs, fat, and protein, because the kernels are mostly water and glucomannan fiber. That single number is real, supported by FDA fiber calorie rules and by the fact that human enzymes cannot break glucomannan down into sugar. Treat the plain version as a base, dry-roast it before seasoning, and it slots into keto, low-calorie, and low-glycemic eating without disrupting your daily macros.

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