Brine Calculator
Enter your water amount, pick a salt percentage and get the exact salt weight. Choose whether your recipe measures salt against the water only, or against the total weight of water plus vegetables - both are calculated so you can compare with any recipe.
Results
- Water
- 3,785 g
- Brine weight (water + salt)
- 3,918 g
- Salt as % of water
- 3.5%
- Salt as % of total weight
- 3.5%
You chose Percent of water weight. Both numbers are always shown so you can compare with any recipe.
How the calculation works
On the water basis, salt = water × percentage ÷ 100. On the total-weight basis, salt = (water + vegetables) × percentage ÷ 100. Because salt adds its own weight to the jar, the percentage against total weight always reads lower than against water alone.
Total basis: salt = (water + vegetables) × pct ÷ 100
Water volume is converted at 1 ml ≈ 1 g (room-temperature water). Salt volume measures are approximate - weigh for accuracy.
Common brine concentrations
Starting points drawn from published recipes and extension guidance. They are ranges, not rules - always follow a tested recipe for long-storage or high-risk ferments.
| Ferment | Brine % | Measured on | Notes | Source |
|---|---|---|---|---|
| Fermented cucumbers (pickles) | 3.5–5% | Water weight | Classic range. Use the low end for short, cool-room ferments. | USDA Complete Guide to Home Canning, Guide 6 (fermented pickles, ~5%); Katz, The Art of Fermentation (2012) |
| Hot peppers / pepper mash | 2–5% | Water weight | Higher percentages slow fermentation and preserve color; traditional long-storage mashes go up to 10%. | Katz, The Art of Fermentation (2012); Shockey & Shockey, Fermented Vegetables (2014) |
| Quick ferments (green beans, cauliflower, carrots) | 2–3% | Water weight | Short 3-7 day room-temperature ferments; refrigerate when they taste right. | Katz, The Art of Fermentation (2012) |
| Sauerkraut and pounded vegetables | 2–2.5% | Vegetable weight (dry salt, no added water) | Dry-salt method: salt is a percent of the shredded vegetable weight, no added water. | USDA Complete Guide to Home Canning, Guide 6; Katz, The Art of Fermentation (2012) |
| Whole vegetables in warm weather | 5–10% | Water weight | Extra salt buys safety and time above roughly 75°F / 24°C. | University extension guidance (e.g., Utah State University Extension fermenting factsheets) |
| Olives | 8–10% | Water weight | Often started lower with water changes; follow a dedicated olive recipe. | Katz, The Art of Fermentation (2012) |
For the reasoning behind these numbers - and the water-vs-total basis trap - read the brine percentage guide.
Frequently asked questions
What salt percentage should I use for lacto-fermented vegetables?
Most fermented vegetables do well between 2% and 5% salt measured against the water. Cucumbers commonly use 3.5-5%, quicker soft ferments 2-3%, and warm kitchens or long storage 5-10%. Always follow a tested recipe for long-storage or high-risk ferments.
Should salt be measured against the water or the total weight?
Most pickle recipes measure salt against the water only. Some recipes measure against the total weight of water plus vegetables, which produces a weaker brine for the same number. This calculator shows both concentrations so you can compare with any recipe.
Can I use table salt or iodized salt?
Yes, as long as you weigh it. Iodine is widely believed to slow fermentation or discolor vegetables, though evidence is mixed, so non-iodized salt remains the conventional choice. Anti-caking agents are generally harmless in small quantities.
Why does my salt look different from the recipe when I measure with teaspoons?
Teaspoon weights vary hugely by brand: a teaspoon of Diamond Crystal kosher weighs about half as much as a teaspoon of table salt. This calculator converts grams to teaspoons per salt type, but weighing is always more accurate.
Is 1 milliliter of water 1 gram?
Yes, at room temperature water is almost exactly 1 g per ml, so volume conversions are accurate for kitchen purposes. Dissolved salt makes the finished brine slightly denser, which does not affect the weight-based calculation.