01Available now
Brine Calculator
Get the right salt percentage for vegetables, water, or total batch weight.
Open calculator→Better batches begin here
Fermentation,
made measurable.
Simple calculators and clear guides that take the guesswork out of brines, doughs, brews, and everything bubbling in between.
- ✓ No sign-up
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QUICK TOOL
Brine calculator
Water amount1,000 g
Salt percentage2.5 %
YOU'LL NEED25 g salt
A crisp, balanced brine for most vegetables.
Full calculator available now
START WITH THE NUMBERS
Tools for every kind of ferment.
Reliable ratios and useful answers, designed to be understood at a glance.
02Available now
Sauerkraut Salt Calculator
Calculate salt by cabbage weight for a consistent dry-salted ferment.
Open calculator→03Available now
Sourdough Hydration Calculator
Calculate true hydration, including the flour and water inside your starter.
Open calculator→04Available now
Starter Feeding Calculator
Plan exact starter, flour, water, and discard for any feeding ratio.
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Pizza Dough Calculator
Scale dough balls and calculate flour, water, salt, and yeast for your fermentation schedule.
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Kombucha Sugar Calculator
Scale sweet tea, sugar, loose tea, and mature starter liquid for any batch volume.
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Mead Honey Calculator
Estimate honey weight and target original gravity from batch volume, ABV, and expected finish.
Open calculator→08Available now
Beer ABV Calculator
Calculate estimated ABV, alcohol by weight, gravity drop, and apparent attenuation.
Open calculator→09Available now
Wine Sugar Calculator
Estimate sugar additions and potential alcohol from current and target Brix.
Open calculator→10Available now
Ginger Bug Calculator
Scale initial ingredients and daily feeding totals for a ginger bug starter.
Open calculator→UNDERSTAND THE PROCESSGood numbers.
Good numbers.
Better instincts.
A calculator tells you how much. Our guides explain why—so every batch teaches you something useful for the next one.
Less guessing. More bubbling.
FermentWise is being built as a free, practical resource for curious home fermenters. No account required—just trustworthy tools, useful explanations, and room to experiment.
See what we're building →