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Calcimator

Kombucha Brewing Calculator

Calculate tea bags, sugar, starter liquid, and water for your kombucha batch. Supports black and green tea with customizable sugar and starter ratios.

Inputs

Results

Tea Bags

16

Sugar280 g
Starter Liquid400 mL
Water3,600 mL
Est. Fermentation7 days
How to Use This Calculator
  1. Enter batch volume in liters.
  2. Select tea type (black or green) to apply the correct tea bag rate.
  3. Set sugar grams per liter and starter liquid percentage.
  4. The calculator returns number of tea bags, sugar in grams, starter liquid in mL, water volume, and estimated first-fermentation days.
  5. Brew tea, dissolve sugar, cool to room temperature, add starter and SCOBY, then ferment for the displayed number of days before bottling.

How the result changes with Batch Volume (liters)

Batch Volume (liters)Tea Bags
5.4522
1872
33132
45180

What each input means

Batch Volume (liters)
Total batch size in liters. A typical home batch is 3–4 L.
Tea Type
Black tea is most common for kombucha. Green tea produces a lighter flavor.
Sugar (g per liter)
Grams of sugar per liter. Standard is 60–80g/L. The SCOBY consumes most of it.
Starter Liquid (%)
Percentage of total volume that is starter liquid (mature kombucha). 10–15% is standard.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Batch Volume (liters) = 4, Tea Type = 1, Sugar (g per liter) = 70, Starter Liquid (%) = 10 = 4 input(s) provided
  2. Calculate Tea Bags
    Tea Bags
    16 = 16
  3. Calculate Sugar
    Sugar
    280 = 280
  4. Calculate Starter Liquid
    Starter Liquid
    400 = 400

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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