Is spaghetti keto?
spaghetti is not keto: it has ~21 g of net carbs per 1 cup, against the keto diet's 5 g-per-serving limit.
Net carbs = total − fiber
21 g
per 1 cup
These are the carbs that count on keto: total carbs minus fiber.
A single serving of cooked spaghetti contains over 21 grams of net carbs, which will quickly disrupt ketosis.
Nutrition facts for spaghetti
How many carbs are in spaghetti?
spaghetti has ~28 g of carbs and ~21 g of net carbs per 1 cup (total carbs minus 6 g of fiber).
Why spaghetti is not keto?
On keto the goal is to stay under ~5 g of net carbs per serving; spaghetti has 21 g per 1 cup (28 g total − 6 g of fiber).
How much spaghetti can I eat on keto?
To stay under 5 g of net carbs, the limit is ~57 g of spaghetti. A better keto alternative is zucchini noodles.
Best keto alternative
Related
No
No
No
Yes
In moderation
No
See all: Keto fast food
Reviewed by the Ketorai team · Last updated: August 12, 2026 · How we assign the verdict
For information only. This does not replace advice from a health professional.
Something off? Let us know.
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