How many calories are in kombucha?

Kombucha has about 16 calories per 100 g, or about 60 calories in a 12 fl oz (355 ml) bottle, according to US nutrition data. Almost all the calories come from sugar: about 15 g in a 12 fl oz bottle. Homemade kombucha and "zero sugar" brands can differ a lot, so check the label or the recipe.

Updated 2026-10-03

Key facts

Per 100 g. US nutrition data list kombucha at 16 kcal, 3.98 g of carbohydrate and 3.99 g of sugars, with 0.1 g of protein. [1]
Per bottle. The same entry gives 372 g for a 12 fl oz can or bottle, which works out at about 60 kcal and 15 g of sugars. [1]
Caffeine too. The entry lists 11 mg of caffeine per 100 g, about 41 mg per bottle. [1]

Where do the calories in kombucha come from?

From sugar. TTB describes kombucha as "a fermented beverage produced from a mixture of steeped tea and sugar, combined with a culture of yeast strains and bacteria". [2] The culture uses some of the sugar during fermentation, and what is left gives most of the calories. [1] A study of commercial kombucha found large differences between brands, including in alcohol content, which ranged from 0% to 1.29%. [3] How it is brewed is covered in what kombucha is, and the glossary entry for fermentation explains the process.

How does kombucha compare with other drinks?

Drink	Calories per 100 g
Kombucha	16 kcal [1]
Apple cider (fresh)	46 kcal [4]
Hard cider	56 kcal [5]

For apple cider, see calories in apple cider. For amounts and caffeine, see how much kombucha to drink a day and does kombucha have caffeine.

Related answers: what kombucha is · calories in apple cider

Related on Cider Radar

Guide: what is cider? · Glossary: fermentation

Questions

How many calories are in homemade kombucha?

It depends on how much sugar you start with and how long it ferments: the longer it ferments, the more sugar the culture uses up. Without a lab test, you can only estimate; the US average for kombucha is 16 kcal per 100 g. [1] [2]

How much sugar is in zero-sugar kombucha?

Products sold as zero sugar usually use non-sugar sweeteners or ferment longer. Check the nutrition panel on the label, which lists sugars per serving.