Jun Recipe Calculator
Scale the ingredient quantities in Kombucha Kamp’s published Jun recipe: raw honey, green tea, water, mature Jun starter and a Jun culture. Choose a nominal vessel size and a starter amount within the source’s range.
The recipe scales by vessel size. Its ingredient measures do not add up to that vessel’s full capacity.
Ingredients for your nominal 2-quart vessel
Raw honey
0.5 US cups
8 US tbsp · 4 US fl oz
Estimated weight: 168 g · 5.9 oz by weight
Water
6 US cups
2 cups hot + 4 cups cold
About 1,420 mL total water
Mature Jun starter
0.5 US cups
About 118 mL, plus a Jun culture
Loose green tea
2–2.5
US teaspoons
Sum of separate liquid measures: 7 US cups
Nominal vessel size is a recipe-scaling label. For a nominal 1-US-gallon vessel, the source lists 12 US cups water, 1 US cup honey and 1–2 US cups starter. Those separately measured ingredients add to 14–15 cups. Their sum is not an exact mixed yield or headspace measurement: tea absorption, mixing and the culture can affect the actual fill. The source does not instruct you to top up to a gallon.
How these quantities are calculated
Every source quantity is multiplied by nominal US quarts ÷ 4. All cups, tablespoons, teaspoons and fluid ounces are US customary liquid measures. Weight ounces measure mass.
Honey weight uses a cooking estimate of 1.4204 g/mL, interpolated from FAO Table 2.4 at 20°C and assumed 17.5% moisture. Specific gravity is approximated numerically as g/mL. Actual honey varies; the recipe specifies honey by volume, and the grams and weight ounces are estimates.
FAO: honey properties, Table 2.4 · Explore honey weight and volume estimates
The source gives 4–5 teaspoons loose green tea per nominal gallon; that range scales with vessel size. The source also gives 4–5 tea bags for the full recipe. Tea-bag sizes vary; use the loose-tea measurements for scaled batches.
Use the original recipe for brewing instructions. This calculator scales ingredient quantities; it does not predict fermentation time, acidity or alcohol content. Read the original recipe.
Quart, half-gallon and gallon examples
Nominal 1 US quart vessel
3 cups water (1 hot + 2 cold); 0.25 cup honey (about 84 g); 0.25–0.5 cups mature starter; 1–1.25 teaspoons loose green tea; plus a Jun culture.
Separate liquid measures total 3.5–3.75 US cups.
Nominal 2 US quarts (½ gallon) vessel
6 cups water (2 hot + 4 cold); 0.5 cup honey (about 168 g); 0.5–1 cups mature starter; 2–2.5 teaspoons loose green tea; plus a Jun culture.
Separate liquid measures total 7–7.5 US cups.
Nominal 4 US quarts (1 gallon) vessel
12 cups water (4 hot + 8 cold); 1 cup honey (about 336 g); 1–2 cups mature starter; 4–5 teaspoons loose green tea; plus a Jun culture.
Separate liquid measures total 14–15 US cups.
Jun quantity questions
How much honey does the recipe use for a nominal 1-quart Jun vessel?
One quarter of a US cup of raw honey: 4 US tablespoons or 2 US fluid ounces. At the calculator’s density assumption, that is approximately 84 g or 3.0 oz by weight. These quantities scale Kombucha Kamp’s original recipe, which uses 1 US cup honey per nominal gallon.
Does a nominal 1-gallon vessel mean 1 gallon of finished Jun?
No. The source lists 12 US cups water, 1 US cup honey and 1–2 US cups starter, plus a Jun culture. The separately measured liquid ingredients add to 14–15 US cups, not 16. This is not a measurement of mixed yield or headspace: tea absorption, mixing and the culture can affect actual fill. There is no instruction to top up to a gallon.
What do the starter choices mean?
They select 1, 1.5 or 2 US cups of mature Jun starter per nominal gallon, scaled to your vessel size. The published recipe allows 1–2 cups plus a Jun culture. The default is the lower end; 1.5 cups is the midpoint, not a separately tested optimum.
How is the green tea measured?
The source uses 4–5 teaspoons of loose green tea per nominal gallon. This becomes 1–1.25 teaspoons per nominal quart. The source also gives 4–5 tea bags for the full recipe. Tea-bag sizes vary; use the loose-tea measurements for scaled batches.
Why are honey weight ounces different from fluid ounces?
Weight ounces measure mass; US fluid ounces measure volume. One quarter of a US cup is exactly 2 US fluid ounces. The honey in that volume is estimated to weigh about 84 g, or 3.0 weight ounces, using the 1.4204 g/mL FAO-table cooking estimate at 20°C and assumed 17.5% moisture. Actual honey varies.
Where are the brewing instructions?
Follow the original Kombucha Kamp Jun recipe on page 6 of its DIY Guide to Lacto-Fermented Sodas and Other Goodies. This calculator scales that recipe’s ingredient quantities; it does not determine fermentation time, acidity, alcohol content or readiness to bottle.