Espresso Yield

A dialed-in espresso shot comes down to two numbers: how much ground coffee goes into the portafilter (the dose) and how much liquid espresso comes out (the yield). This calculator starts from Basket Size, which sets the Dose in grams -- a single basket holds about 7g, a double about 18g, and a triple about 21g -- and Basket Size is the sole determinant of Dose; the Target Brew Ratio plays no role in that figure whatsoever, since dose is purely a function of how much coffee physically fits in the basket you're using.

Yield is then simply Dose multiplied by the Target Brew Ratio, so raising the ratio always raises the Yield in direct proportion for any basket: a 1:2 ratio on an 18g double basket yields 36g, while a 1:3 lungo ratio on the same basket yields 54g. The Brew Ratio label (e.g. "1:2") just restates the Target Brew Ratio input as a readable dose-to-yield relationship, and the Target Extraction Time range is estimated to shift later as the ratio increases, since a longer, more diluted pour (a lungo) typically takes more time to extract than a short, concentrated ristretto pour at the same grind and dose -- the window stays a fixed 10 seconds wide, it just moves to a later start and end time.