The brew ratio describes the relationship between the coffee grounds and the final espresso yield. Standard: 1:2 (18 g in, 36 g out) — balanced. 1:1.5 (Ristretto) is more concentrated and sweeter; 1:3 (Lungo) is milder and longer.

What is the ideal espresso ratio?

The brew ratio describes the relationship between the coffee grounds and the final espresso yield. Standard: 1:2 (18 g in, 36 g out) — balanced. 1:1.5 (Ristretto) is more concentrated and sweeter; 1:3 (Lungo) is milder and longer.

Why that is

The brew ratio is one of the most critical metrics in the world of espresso. It expresses how much water flowed through how much coffee — and thus dictates the strength, body, and flavor profile of your shot.

1:2 — the classic standard in the specialty scene. 18 g of coffee grounds yields 36 g of espresso. Over a 25–30 second extraction time, this produces a well-rounded shot with good sweetness, moderate acidity, and a pleasant body. For most beans and roasts, 1:2 is a very safe starting point.

1:1 to 1:1.5 (Ristretto) — less water pushed through the same amount of coffee. The result is more concentrated, syrupy, and sweeter, because primarily the easily soluble sugars and fruit esters are extracted. Bitter compounds, which emerge during the latter part of the extraction, stay largely left behind in the puck. Ristrettos work especially well with medium to dark roasts.

1:3 to 1:4 (Lungo) — more water pushed through the same amount of coffee. The espresso is milder and thinner, but the extended extraction also brings more bitter and harsh notes into the cup. A Lungo is not the same as an Americano (espresso + hot water) — in a Lungo, all the water is forced through the coffee puck under pressure.

In traditional Italian espresso culture, the ratio is often measured by volume (25–30 ml of espresso). In the modern specialty scene, we measure by weight — it is much more precise, as the crema artificially inflates the volume. A cup with lots of crema might look full, but actually contains less liquid.

Which ratio is “right” depends entirely on the beans and your personal taste. Light roasts often benefit from longer ratios (1:2.5 to 1:3) because they are dense and need more water to release their complex flavors. Dark roasts often fare better with shorter ratios (1:1.5 to 1:2), as they can easily become bitter with too much water.

In practice at Green Wall Coffee

At Sophienstraße 27, our standard working ratio is 1:2, and we adjust from there depending on the bean. For our Ethiopian light roast, we stretch it to 1:2.5 — that pulls out the vibrant fruit notes without the shot turning thin. For darker blends, we lean closer to 1:1.8. I always tell guests: start at 1:2, taste it, and take notes. The ratio is easy to measure (use a scale!) and is one of your most effective flavor levers.

Related questions

• How do I make the perfect espresso?
• What is a ristretto and what is a lungo?
• How long should an espresso shot take?

You can find more in-depth information in the article How to make perfect espresso. Or drop by Sophienstraße 27 — Mon–Fri 8am–5pm, Sat 10am–5pm.