What Is a Lungo? Why a Long Shot Isn't Twice the Coffee

A lungo is an espresso with more water pushed through the same coffee, stopped at about 1:3 to 1:4 instead of the usual 1:2. It isn't diluted afterward, which is what separates it from an Americano. It is also not double the coffee: the extra water brings out surprisingly little.

The one-line test: if the extra water ran through the coffee, it's a lungo. If it went into the cup afterward, it's an Americano or a long black.

Four drinks from one dose

The dose stays put. What changes is when you stop the shot, and whether water gets added later. The solids and caffeine rows come from a 2023 extraction study in Foods that used a 20 g puck and calculated what reached the cup at each ratio.

Ratios: Wikipedia calls these relative terms without exact measurements and gives 1:1, 1:2 and 1:4 as a rough guide, while Trade Coffee gives 1:3 to 1:4. Strength and the Americano column are our arithmetic from the study's figures, assuming the same 40 g shot topped up to 60 g. The "suits you" row is our reading, not a measurement.

The last third of a lungo is mostly water

Most lungo explainers say a long pull extracts more. True, but the amount is the part they skip. In that study's central condition:

• Going from a 20 g drink to 40 g added 33% more solids.
• Going from 40 g to a 60 g lungo added only 8% more solids and about 13% more caffeine.
• So at the same 60 g size, a lungo beat an Americano built from the same shot by roughly those margins and no more.

As a share of the puck, solids rose from 19.4% at 1:2 to about 21% at 1:3, again by our arithmetic. The study's authors also found that brew ratio mattered more than flow rate, grind or temperature, which is the best argument for weighing your shot.

Keep the limits in view: this was one washed Colombian coffee on a flow-controlled lab setup, and the authors describe their conclusions as qualitative trends. It stopped at 1:3 and measured chemistry, not flavor.

Does a lungo taste more bitter?

Often, according to people who sell and brew coffee, though the mechanism is less tidy than "over-extraction." The numbers above show extraction slowing, and they cannot tell you how the cup tastes.

What's on record:

• Wikipedia explains that compounds dissolve at varying rates, so a lungo isn't simply a half-strength espresso.
• Homegrounds says it's less sweet, with more complex bitterness and acidity.
• Copenhagen Coffee Lab says it can highlight bitterness, which is why many people grind slightly coarser.
• L'OR calls it milder and slightly bitter.

Treat those as tasting reports, not a law. If yours is harsh, the sour vs bitter guide helps separate a long-shot taste from a shot that was already off.

Why nobody agrees on the size

Search this drink and you get answers that differ by close to a factor of two. They aren't all describing the same shot.

Dose explains some of the gap, and milliliters explain the rest: a volume reading doesn't tell you the ratio. Grams do, so use the ratio and ignore the cup line.

Pull one on a home machine

1. Dose 18 g into a double basket and grind slightly coarser than your usual espresso, as Copenhagen Coffee Lab suggests.
2. Tare a scale under the cup. The slim Maestri House S1 Air is built to fit on a drip tray.
3. Start the shot and stop at 54 g, which is 1:3. Expect it to run longer than a normal shot.
4. Taste it. If it's harsh, go coarser or stop sooner. If it's thin, stop sooner first.
5. Try 72 g (1:4) only once 54 g tastes right.

The espresso dial-in tool works out the target for any dose. A grinder with fine espresso steps, such as the Baratza Encore ESP, makes the coarser adjustment repeatable.

Button machines take one extra step. The Breville Bambino has a 2 Cup preset of about 60 ml, so it won't reach a lungo by itself. Its manual lets you press the button again to stop, and to reprogram the volume, so you can save a longer shot.

Nespresso's lungo is its own thing

A Nespresso lungo isn't a long pull of an espresso capsule. Nespresso's FAQ describes a 110 ml shot from the large cup button, using capsules with a coarser grind, and says extracting at the recommended level prevents over-extraction. That means the capsule matters as much as the button.

Those figures come from Nespresso's Hong Kong FAQ, which also explains how to reprogram the cup size on Original machines including the CitiZ and the Essenza Mini. Ranges vary by region, so read them as a guide. If cup size is your real question, see Vertuo vs Original. For the diluted route, our Americano guide has the water ratios.