Espresso Ratio Calculator
Works out how much espresso to pull from your dose, and checks the shot you actually got.
Target shot weight
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Ratio of your shot —
Flow — g/s
Reading this —
The formula
shot weight = dose × ratio flow = shot weight ÷ time
Espresso is measured by weight, because crema makes its volume unreliable.
What to watch out for
Set the dose, weigh the shot in the cup as it pours, and stop at the target. Change one thing at a time when dialling in.
Frequently Asked Questions
What is the standard espresso ratio?
Usually about 1:2, so an 18 g dose gives 36 g in the cup.
What is the difference between a ristretto and a lungo?
The same dose with less or more water through it. From 18 g, a ristretto is about 27 g and a lungo about 54 g.