Yield (espresso)

Yield is the output side of the espresso equation. Paired with dose, it defines the brew ratio — the most important single variable in espresso recipe design. A 1:2 ratio (e.g., 18g in, 36g out) is the modern specialty standard for most beans.

Yield is controlled by stopping the shot when it reaches the target weight on a scale, not by letting the shot run until it visually 'finishes.' Visual cues vary widely; weight is repeatable. This is why every modern espresso bar has a scale under the portafilter spout.

Different roast levels respond to different ratios. Lighter roasts often need a higher ratio (1:2.5 or 1:3) to develop sweetness and reduce sour edge. Darker roasts tighten to 1:1.8 or even 1:1.5 to preserve body and avoid bitterness. Single ratio rules don't work across all beans.