Fermentation Time Calculator
Vegetable Fermentation
Fermentation times for lacto-fermented vegetables
Dairy Fermentation
Fermentation times for yogurt, kefir, and other dairy
Formula
Adjusted Time = Base Time x Temperature Factor x Salt Factor | Temp Factor = 2^((68 - Temp°F) / 15) | Salt Factor = Salt% / 2%
Frequently Asked Questions
What is the ideal temperature for fermenting vegetables?
The ideal temperature for most vegetable fermentation is 65-75°F (18-24°C). Below 60°F fermentation is very slow; above 80°F it can produce off-flavors and soft textures. Cooler, slower fermentation generally produces better flavor.
How much salt do I need for fermentation?
For most vegetable ferments, use 2-3% salt by weight of the vegetables. For example, 1 kg of cabbage needs 20-30 g of salt. Too little salt allows harmful bacteria to grow; too much slows fermentation and produces salty results. Use non-iodized salt.
How do I know when fermentation is done?
Taste it! Fermented vegetables should taste pleasantly tangy and sour. Bubbling will slow or stop as fermentation completes. For sauerkraut, most people prefer 2-4 weeks. Once it tastes right to you, refrigerate to slow further fermentation.
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