Use this oenology calculation to document or plan a defined fermentation, blending, adjustment, stabilization, aging, packaging, sensory, or cellar operation from measured wine parameters.

Water ratio (mL/g)

Milliliters of clean warm water per gram of dry yeast; ten is the common cellar ratio.

Yeast (g)

Dry yeast to be rehydrated.

Size the warm water volume for rehydrating active dry yeast at the chosen milliliter-per-gram ratio. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Rehydration water (mL)

Water volume for the rehydration slurry.

• Wine chemistry and microbiology depend on temperature, pH, alcohol, sugar, matrix, measurement method, microbial state, legal limits, product formulation, and bench-trial response. Generic doses and thresholds are not production instructions for every wine.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm measurements with calibrated winery methods, run scaled bench trials, record additions and lot volumes, check local regulations and supplier specifications, and obtain professional laboratory advice for faults or stability risks.

• Alcohol Adjustment Water Blend Volume Calculator

  Size the watering-back addition that lowers a lot from its current alcohol to the target while conserving total ethanol.

• Bentonite Fining Dose Calculator

  Convert a bench-trial or treatment-plan bentonite rate in grams per liter into kilograms of dry bentonite for the selected wine volume.

• Yeast Inoculation Rate g/hL Calculator

  Express the pitched dry yeast mass as an inoculation rate in grams per hectoliter of must.