Advanced Tool
Vinegar Mother Calculator
Turn wine, cider, beer, or fruit juice into living vinegar. Estimate conversion time, target acidity, and when to start testing. Patience and oxygen — that's the recipe.
6%
3% (low)8% (sweet spot)15% (high)
mL
75°F
60°F (cool)77°F (ideal)85°F (warm)
Est. Conversion Time
3
weeks
Conversion Details
Target acidity~4.6%
Acetobacter activityHigh
Start pH testing atWeek 1
Expected yield~460 mL
Chemist's note
Vinegar is the opposite of lacto-fermentation: it needs oxygen. Acetobacter converts ethanol to acetic acid only in the presence of O₂. Cover your vessel with cheesecloth or a breathable cloth — never an airlock. A wider vessel (more surface area) means faster conversion. The mother is a cellulose biofilm produced by the bacteria, not the bacteria themselves. It's a sign of healthy fermentation, not a requirement.