Espresso Brew Ratio Calculator
Pull consistent shots by weight. Set your dose and target ratio to find the yield to stop at, or enter a shot you measured to see the ratio you actually got — with ristretto, normale, and lungo ranges to guide you.
The ground coffee in the basket, weighed dry.
Formula & how it works
Yield is dose × ratio; ratio is yield ÷ dose. The style label reads the ratio: below 1:1.5 is ristretto, up to about 1:2.5 is normale, and beyond that is lungo.
Worked example
An 18 g dose at a 1:2 target yields 36 g in the cup — a normale. Measured a shot instead? An 18 g dose that poured 45 g worked out to 1:2.5, at the longer end of normale heading toward lungo.
Dialing in espresso
Weigh in, weigh out
The most repeatable espresso comes from controlling two weights: the dry dose going in and the liquid coming out. A scale under the cup lets you stop the shot at a target yield instead of guessing by the look of the stream, which drifts as beans age and grind settings change.
Ratio versus time
Ratio and shot time are separate levers. The ratio decides how concentrated the drink is; the grind decides how long that volume takes to pour. If a 1:2 shot gushes out in 15 seconds it will taste sour and thin — grind finer. If it drips for 45 seconds it will be harsh — grind coarser.
Pick a style, then refine
Start at 1:2 for most coffees and adjust to taste. Pull tighter toward ristretto for a syrupy, intense shot that suits milk drinks, or longer toward lungo for a lighter, more extracted cup. Once you find a ratio you like, keep it fixed and let grind be your day-to-day adjustment.