Extraction yield

Definition

Extraction yield is the share of the dry dose that dissolved into the cup. EY% = TDS% × yield / dose. Under-extracted shots taste sour and thin; over-extracted shots go dry and bitter. SCA’s 18–22% window is a starting band, not a law — roast, grind and water move it. You need a refractometer for TDS; guessing EY from taste alone is folklore.

Calculators that use this

• Grind size & dialing in

  Espresso Extraction Yield Calculator

  Compute extraction yield and brew ratio from refractometer TDS, basket dose and beverage mass. EY% = TDS% × yield / dose.

• Grind size & dialing in

  TDS Target Calculator

  Work backwards from dose, beverage yield and a target extraction yield to the TDS your refractometer should read. Strength is not extraction.