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Brew parameters

Extraction yield

Also known as extraction yield · EY% · porcentaje de extracción · extraction %

Diagrama de rendimiento de extracción (EY%)

What it is and what sets it apart: EY% ≈ (TDS × beverage mass) / dose. Distinct from beverage yield (grams) and strength. Extraction axis of the brew chart.

How it’s used or measured: Measure TDS → formula with dose and yield → taste. Log EY% in Brew Lab.

Flavours and cup impact: Filter guide ~18–22%; espresso bands differ. Low EY%: under; high: over (with nuance).

Technical notes: Tare/retention/calibration errors skew EY%. Always taste.

Common mistakes: Chasing 20% at all costs. Confusing EY% with TDS or gram yield.

Extraction TDS Refractometer Brew Control Chart Yield Coffee strength

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