A 1:2 espresso ratio means the liquid espresso in the cup weighs about twice as much as the dry coffee dose. If you put 18 g of coffee in the basket and stop at 36 g in the cup, that is a 1:2 brew ratio.
How do you calculate espresso brew ratio?
Use beverage weight divided by dry coffee dose. The ratio is written as coffee first, espresso second.
Same 18 g dose, three very different outputs
18 g coffee → 18 g espresso
18 g coffee → 36 g espresso
18 g coffee → 54 g espresso
La Marzocco currently uses the same 18 g in / 36 g out example as a practical “normale” starting recipe. That does not make 18 g a universal dose; your dose should stay appropriate for the basket you are using.
Why is 1:2 such a common starting point?
Because it sits in a useful middle zone between a very short, concentrated shot and a much longer, more diluted one. In a historical SCA/Barista Guild survey of specialty baristas, the average reported brew ratio was close to 1:2, with responses spanning a wider range.
La Marzocco’s current home-espresso guidance also uses 1:2 as a repeatable starting point for a medium-roasted espresso blend. That is a strong reason to start there—but not a reason to refuse to move when the coffee tastes better somewhere else.
What changes when you use a shorter or longer ratio?
Ratio changes more than cup volume
Usually more concentrated and viscous. Can feel heavier and more intense.
Often a useful balance of body, sweetness and clarity.
Usually thinner and less concentrated, with more water passing through the coffee and more extraction opportunity.
La Marzocco summarizes the same relationship simply: smaller ratios are thicker and more viscous; larger ratios become more stretched out and thinner. That does not mean “short = good body” and “long = watery failure.” A light roast may need a longer ratio to taste complete, while a darker roast may become harsh if stretched too far.
Are 1:1, 1:2 and 1:3 the same as ristretto, espresso and lungo?
They are useful style labels, but not globally enforced definitions. La Marzocco’s current educational material borrows Italian espresso language and groups roughly 1:1–1:2 as ristretto territory, 1:2–1:3 as normale, and 1:3–1:4 as lungo.
That is helpful for understanding direction, but cafés and roasters may use the words differently. Treat the ratio as the precise information and the drink name as the style label.
| Approximate ratio style | Example with 18 g dose | Typical direction |
|---|---|---|
| 1:1 | 18 g in → 18 g out | Very concentrated, short, heavy body |
| 1:1.5 | 18 g in → 27 g out | Still concentrated but less extreme |
| 1:2 | 18 g in → 36 g out | Common starting point for balanced espresso |
| 1:2.5 | 18 g in → 45 g out | More open, less concentrated, often useful for lighter coffees |
| 1:3 | 18 g in → 54 g out | Longer, thinner, more extraction opportunity |
Should light roast and dark roast use the same ratio?
Not necessarily. La Marzocco’s current brew-ratio guidance says darker-roasted coffees often perform well at smaller ratios, while lighter roasts often benefit from larger ratios.
The reason is practical: light roasts are generally denser and harder to extract, so more beverage yield can help move the cup toward sweetness and clarity. Darker roasts usually extract more easily and can become bitter or thin if stretched too far.
Use that as a direction, not a law. The roaster’s recommended recipe is a better starting point than roast color alone.
Should you change ratio or grind first?
If you are dialing in from scratch, lock the dose and target yield first, then change grind until the shot flows in a sensible range. That gives you a stable recipe to taste.
A clean way to use brew ratio
If your 1:2 shot lands around a normal time but still tastes sharp or unfinished, do not assume the ratio is sacred. The previous guide on sour espresso with a normal shot time explains when a slightly longer yield can be the better next test.
How do you know whether to shorten or extend the ratio?
| What the cup tastes like | Ratio experiment | Keep fixed first |
|---|---|---|
| Sharp, sour, short finish | Try a modestly longer yield | Dose and grind |
| Heavy but dull / muddy | Try a slightly longer ratio | Dose |
| Thin, dry, bitter | Try a shorter yield | Dose and grind |
| Sweet, balanced and satisfying | Stop changing things | Repeat the recipe |
Ratio experiments work best when you keep the coffee, dose and temperature stable. If you change everything at once, you cannot tell whether the improvement came from ratio, grind or temperature.
Do you measure espresso ratio by grams or milliliters?
Use grams whenever possible. Crema can make volume misleading because the foam occupies space without representing the same liquid mass. Weight makes a 1:2 recipe much easier to repeat across shots.
The SCA’s historical survey also found that most responding specialty baristas measured espresso yield by weight rather than volume. Modern gravimetric espresso workflows follow the same logic.
FAQ
Is 18 g in and 36 g out always correct?
No. It is a widely useful 1:2 starting recipe. The correct dose depends on basket size, and the best yield depends on the coffee and the taste you want.
Is 1:2 a double espresso?
Not automatically. Brew ratio describes input-to-output weight, not the café menu label “single” or “double.” An 18 g dose at 1:2 gives 36 g of espresso; another café may use a different dose for its double basket.
Is 1:3 too long for espresso?
No. It is a longer style and can be useful for some coffees, especially when you want more extraction and less concentration. It will taste and feel different from a shorter shot.
Should I use 1:2 for light roast espresso?
You can start there, but many light-roast coffees benefit from a larger ratio. La Marzocco’s modern espresso guidance also treats longer ratios as a common tool for lighter roasts.
Does changing grind change the brew ratio?
Not if you stop the shot at the same target yield. Grind changes how quickly you reach the target and how the extraction develops; ratio changes the relationship between dose and beverage weight.
References
- La Marzocco — Using Espresso Brew Ratios
- La Marzocco Home — Using Espresso Brew Ratios (video)
- La Marzocco — Dialling-In with Coffee Station
- La Marzocco — Dialing in a Modern Espresso
- Specialty Coffee Association — Defining the Ever-Changing Espresso
Evidence boundary: ratio labels such as ristretto, normale and lungo are not globally standardized to one mandatory number. Use the measured coffee-to-beverage ratio as the precise description, then use style names as shorthand.