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

Initial volume (L)

Volume before the racking.

Remaining volume (L)

Clean wine racked off the lees.

Express the volume left behind on lees as a percentage of the original lot during a racking. 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]

Racking loss (%)

Share of the lot left behind in the racking.

• 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.

• Fermentation Completion ABV Estimator

  Estimate alcohol by volume from original and final specific gravity using ABV ≈ (starting SG − finishing SG) × 131.25; the shortcut is not a laboratory alcohol measurement.

• 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.

• Barrel Angel's Share Loss Calculator

  Project cumulative barrel-aging evaporation from an annual percentage loss, compounding the loss against the remaining wine for fractional or multiple years.