About Ferment Safe

fermentation-jar-headspace-calculator.hub2.day is a focused independent web utility built around Ferment Safe.

What This Site Does

Enter your jar size, ingredient type, and fill level to calculate the safe headspace needed for fermentation — preventing messy overflows and failed batches.

Who It Helps

Home fermenters making sauerkraut, kimchi, hot sauce, and other lacto-fermented foods who have experienced overflow disasters or want to prevent them

Contact

Questions, corrections, and feedback can be sent to hello@hub2.day.