Kombucha Sugar Calculator

FOOD & COOKING CALCULATOR Kombucha Sugar A precise tool.
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What is the Kombucha Sugar & How does it work?

Kombucha is a symbiotic culture of bacteria and yeast (SCOBY) that ferments sweetened tea into a lightly effervescent, probiotic beverage. During fermentation, the yeast consumes sugar and produces ethanol, which the bacteria then convert into organic acids, giving kombucha its characteristic tang.

The amount of sugar you add determines how much ethanol—and consequently how much alcohol by volume (ABV)—is produced. Roughly, 1 g of sugar yields 0.511 g of ethanol. Because ethanol is less dense than water (0.789 g mL⁻¹), the ABV can be calculated from the ethanol mass, the batch volume, and the target percentage.

\[ S = \frac{ABV times V times 0.789}{0.511 times 100} \]
S = required sugar (g), ABV = target alcohol by volume (%), V = batch volume (L)

Use the calculator below to determine the extra sugar needed for your desired ABV. Input your batch size, target ABV, and any sugar already present, and the tool will output the precise amount of additional sugar to add before sealing the brew.

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Frequently Asked Questions
How much sugar do I need for 1 liter of kombucha?
For 1 liter of kombucha, you typically use about 200-300 grams of sugar.
What is the relationship between sugar and alcohol in kombucha?
Roughly, 1 gram of sugar yields 0.511 grams of ethanol during fermentation.
How can I reduce the alcohol content in my kombucha?
To reduce alcohol content, ferment your kombucha for a shorter time or use less sugar.
What is the typical ABV of homemade kombucha?
Homemade kombucha usually has an ABV between 0.5% and 1.5%, depending on fermentation time and sugar content.
Can I use honey instead of sugar in kombucha?
Yes, you can use honey instead of sugar, but it will affect the flavor profile and fermentation process.
How does temperature affect the fermentation process in kombucha?
Higher temperatures speed up fermentation, potentially increasing alcohol content, while cooler temperatures slow it down.
What are some signs that my kombucha has fermented too much?
Over-fermented kombucha may taste overly sour and have a vinegar-like smell.

Results are for informational purposes only and do not constitute professional advice.