Pickling Salt-to-Vegetable Calculator

For lacto-fermentation (sauerkraut, kimchi, half-sour pickles), you weigh the vegetables and add salt at a target percentage of that weight. The salt creates an environment where beneficial lactic-acid bacteria thrive and harmful bacteria do not. Different fermentations target different concentrations:

• 1.5-2.0%: light, fast ferments (cabbage for short kraut, half-sour cucumbers, quick kimchi)
• 2.0-2.5%: standard sauerkraut and most vegetable ferments — the classic range
• 2.5-3.5%: longer-keeping kraut, stronger pickles
• 5-7%: heavily salted preserves intended for very long storage and later rinsing

The math is simple weight-to-weight:

salt weight = vegetable weight × (brine % / 100)

For 1000 g of cabbage at 2% salt: salt = 1000 × 0.02 = 20 g.

For ounces, the formula is the same (salt oz = veg oz × brine%/100), but in practice salt is much easier to weigh in grams because most kitchen scales display 1-gram resolution. A teaspoon of fine salt weighs about 5-6 g; a teaspoon of coarse pickling salt weighs about 5 g (slightly less due to air gaps).

Why salt matters in fermentation:

1. Pulls water out of the vegetables (osmosis), creating brine without adding any liquid.
2. Inhibits bacteria that prefer fresh-water environments — including most pathogens.
3. Slows the ferment enough to let lactic-acid bacteria dominate.

Too little salt (under 1.5%): ferment moves too fast, becomes mushy, may grow unwanted yeast. Too much salt (over 4%): ferment stalls or never starts; you preserve the vegetable but do not get the tangy lactic acidity.

The 2% target is the sweet spot for most home ferments. Hit it within ±0.2% and the result will be predictable.

Use kosher salt or pickling salt. Avoid table salt with iodine (slows or kills the fermentation bacteria) and avoid added anti-caking agents (can cloud the brine). The cheapest pickling salt at any grocery store works as well as expensive specialty salts.

For vegetables that need a brine added on top (cucumbers, carrots in jars), the brine is mixed separately at the same target percentage: e.g., for 2% brine, dissolve 20 g salt in 1000 g of water, then pour over the vegetables.