Rice noodles are not low carb. A single cup (175g) of cooked rice noodles contains about 42 grams of carbohydrates, with only 1.75 grams of fiber. That puts the net carbs at roughly 40 grams per serving, which is enough to use up nearly an entire day’s carb allowance on a ketogenic diet.
How Rice Noodles Compare to Carb Limits
A standard ketogenic diet limits total carbohydrates to under 50 grams per day, and many people aim for 20 to 40 grams. One cup of rice noodles hits 42 grams of carbs on its own, before you add any sauce, vegetables, or protein to the dish. Even on a more relaxed low-carb plan that allows higher carbohydrate intake, rice noodles take up a large portion of your daily budget in a single sitting.
The fiber content doesn’t help much here. With less than 2 grams per cup, subtracting fiber barely changes the number. Net carbs land around 40 grams, which is still high by any low-carb standard.
White vs. Brown Rice Noodles
Brown rice noodles are sometimes marketed as a healthier option, and they do have a nutritional edge. Because brown rice flour retains the bran and germ that get stripped during white rice processing, brown rice noodles deliver more fiber and B vitamins. But the carbohydrate count stays in a similar range. Choosing brown over white is a better move for blood sugar management and overall nutrition, but it won’t make rice noodles low carb.
Glycemic Index of Rice Noodles
Beyond the raw carb count, rice noodles vary in how quickly they raise blood sugar depending on the type. Dried rice noodles that are boiled have a glycemic index around 61, which falls in the medium range. Rice vermicelli comes in slightly lower at 58. Fresh rice noodles score notably better at 40, placing them in the low glycemic category. If you’re concerned about blood sugar spikes rather than total carb count, fresh rice noodles are the better pick.
That said, a low glycemic index doesn’t mean low carb. Fresh rice noodles still deliver a similar amount of total carbohydrates. They just release that glucose into your bloodstream more gradually.
Lower-Carb Noodle Alternatives
If you want a noodle-like texture in stir-fries or soups without the carb load, shirataki noodles are the most dramatic swap. Made from a plant fiber called glucomannan, shirataki noodles contain roughly 2 grams of carbs per serving compared to 43 grams in rice noodles. They’re nearly calorie-free, which makes them popular on keto and very low-carb diets. The trade-off is texture and flavor: shirataki noodles are chewier and more gelatinous than rice noodles, and they absorb sauce rather than having much taste of their own. Rinsing them well and dry-frying them in a hot pan before adding to your dish improves the texture significantly.
Kelp noodles are another option, made from seaweed and typically containing around 1 gram of carbs per serving. They work best in cold dishes or light broths. Edamame and black bean noodles offer a middle ground, with moderate carbs but much higher protein and fiber than rice noodles.
Can You Fit Rice Noodles Into a Low-Carb Diet?
On a strict keto diet (20 to 50 grams of carbs per day), rice noodles are essentially off the table. Even a half-cup serving uses up around 20 grams, leaving almost no room for vegetables, sauces, or anything else that contains carbohydrates.
On a more moderate low-carb approach, say 100 to 150 grams per day, a small portion of rice noodles can work if you plan around it. You’d want to keep the rest of that meal and your other meals focused on protein, healthy fats, and non-starchy vegetables. Pairing rice noodles with a generous amount of vegetables and protein also helps slow digestion and reduce the blood sugar impact of the meal.
But if your primary goal is cutting carbs, rice noodles aren’t doing you any favors. They’re made almost entirely of refined starch, with minimal protein (around 3.5 grams per cup) and very little fiber. Per gram, they carry a carb load comparable to white pasta and white rice. The appeal of rice noodles is their light texture and versatility in Asian-style cooking, not their macronutrient profile for carb-conscious eating.