Use in Moderation
Kombucha
8.00g net carbs per 1 cup (8 oz)
Kombucha averages around 8 g net carbs per cup, which makes it a limit-it drink on keto rather than a daily one. The carbs come from the sugar that feeds the fermentation, and how much is left over depends heavily on the brand.
Built by Barron Hansen · Last updated July 2026
Nutrition Facts
Fits My Daily Budget?
Set your daily net carb limit to see how one serving fits.
One serving uses 40% of your 20g daily budget.
Plan the rest of your day
Good to Know
Sugar content varies a lot between brands, from about 2 g to well over 10 g per serving, so the label is everything here. Look for low-sugar or zero-sugar kombuchas that finish under about 4 g net carbs if you want to fit one in, and treat the sweeter bottles as an occasional treat. The trace alcohol from fermentation is usually under 0.5 percent, worth knowing if you avoid alcohol entirely.
Is Kombucha Keto? The Full Answer
Kombucha contains 8.00g net carbs per 1 cup (8 oz) (8.00g total carbs minus 0.00g fiber). Kombucha averages around 8 g net carbs per cup, which makes it a limit-it drink on keto rather than a daily one. The carbs come from the sugar that feeds the fermentation, and how much is left over depends heavily on the brand.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 40% of a 20g daily carb limit. Track your portions carefully and account for other carbs in your meals.
Better Keto Swaps
For a fizzy option with no sugar at all, plain or naturally flavored sparkling water gives you the bubbles without the carbs.
Track Your Ketone Levels
The Keto-Mojo meter is the gold standard for confirming you're actually in ketosis. Know your numbers - don't guess.