Free Tools
Stop guessing. Measure.
Free fermentation calculators built by a chemist. Because “a pinch of salt” isn't a measurement.
Salt Calculator
Input your vegetable weight. Get exact grams for any brine percentage. To the tenth of a gram.
Use tool →pH Safety Check
Input your pH reading. Get a science-backed safety verdict with pathogen data from real studies.
Use tool →Brine Calculator
Pick your jar size and brine percentage. Get exact water and salt measurements. Zero math.
Use tool →Lab Calculator
Input your environment — product, temperature, salt, container, light. Get a full risk assessment and timeline.
Use tool →Troubleshooter
My ferment looks wrong. Select symptoms, get a diagnosis with severity rating and fix.
Use tool →Recipe Scaler
Scale any recipe up or down. Recalculates salt percentage and brine ratios automatically.
Use tool →Carbonation Calculator
Secondary fermentation timing for soda, kombucha, kefir. Pressure estimates and bottle-bomb risk.
Use tool →Vinegar Calculator
Acetobacter conversion timeline. Starting alcohol, target acidity, estimated weeks.
Use tool →Sourdough Calculator
Hydration, starter percentage, bulk ferment time. Baker’s math made simple.
Use tool →Fermentation Journal
Track your batches. Log pH readings over time. See your ferment’s progress curve.
Use tool →Cost Calculator
Homemade vs store-bought. See your annual savings from fermenting at home.
Use tool →Timeline Tracker
Multi-batch dashboard. Track every active ferment with progress bars and ready alerts.
Use tool →pH Log Graph
Plot pH readings over time. See the curve, the safety threshold, and predicted completion.
Use tool →Substitution Finder
Out of an ingredient? Get ranked alternatives with notes on what changes.
Use tool →Yield Predictor
Input vegetable + jar size. Get total jars, brine needed, and final yield in cups.
Use tool →Flavor Profile Builder
Pick a base and aromatics. See predicted flavor sliders and matched recipe.
Use tool →What Should I Ferment?
7 questions. Personalized recipe match. Built for new fermenters.
Use tool →Annual Savings Calculator
Pick how often you eat each ferment. See annual savings vs premium store brands.
Use tool →