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

Lees depth (cm)

Sediment depth on the vessel floor.

Vessel diameter (cm)

Inside diameter of the cylindrical vessel.

Estimate gross-lees volume as a uniform cylindrical layer across a flat circular vessel floor; sloped, conical, dished, or irregular bottoms require their own geometry. 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]

Gross lees (L)

Estimated volume occupied by the gross-lees layer.

• 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.

• Lees Stirring Interval Planner

  Spread a chosen number of lees-stirring sessions evenly across an explicitly supplied planning period and return the interval between sessions.

• Multi-Tank Volume Weighted ABV Calculator

  Compute the volume-weighted alcohol of a blend across any number of tanks.

• Racking Loss Percentage Calculator

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