Is Sugar keto?
Sugar is not keto: it has ~4 g of net carbs per 1 teaspoon, against the keto diet's 5 g-per-serving limit.
Net carbs = total − fiber
4 g
per 1 teaspoon
These are the carbs that count on keto: total carbs minus fiber.
White table sugar, even in a small serving, has a high glycemic index and should be avoided on a ketogenic diet.
Nutrition facts for sugar
How many carbs are in sugar?
Sugar has ~4 g of carbs and ~4 g of net carbs per 1 teaspoon (total carbs minus 0 g of fiber).
Why sugar is not keto?
On keto the goal is to stay under ~5 g of net carbs per serving; sugar has 4 g per 1 teaspoon (4 g total − 0 g of fiber).
How much sugar can I eat on keto?
To stay under 5 g of net carbs, the limit is ~5 g of sugar. A better keto alternative is eritritol.
Best keto alternative
Related
Yes
Yes
Yes
Yes
Yes
Yes
Keto recipes with sugar
✓ Keto-friendly
✓ Keto-friendly
✓ Keto-friendly
See all: Keto sweeteners
Reviewed by the Ketorai team · Last updated: July 5, 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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