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

Brix

Must dissolved sugar in degrees Brix.

YAN factor (mg/L/°Bx)

Planning factor supplied by the fermentation protocol or yeast producer.

Estimate a YAN target from must sugar and a selectable milligrams-per-liter-per-Brix planning factor. Adjust the factor for yeast strain, fermentation rate, and wine style. 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]

YAN requirement (mg/L)

YAN target for a clean fermentation.

• 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.

• Chaptalization Sugar Requirement Calculator

  Estimate sucrose needed to raise must from measured Brix to a target potential alcohol using 0.59% potential ABV per °Bx and 10 g/L sugar per added °Bx; volume change and non-sugar extract are ignored.

• Potential Alcohol from SG Calculator

  Convert must specific gravity to approximate Brix and then potential alcohol with a caller-selected ABV-per-Brix factor; residual sugar and fermentation efficiency can change actual ABV.

• Ascorbic Acid Complement Dose Calculator

  Convert a user-selected ascorbic-acid treatment rate in milligrams per liter into total grams for a wine lot; determine the rate from an appropriate treatment plan rather than this arithmetic tool.