What Is a Shot of Espresso? Single, Double and Doppio Explained

A shot of espresso is a small, concentrated coffee made by forcing hot water through finely ground coffee under about 9 bar of pressure. A single shot uses roughly 7 g of coffee and yields about 1 fl oz (25–30 ml) in around 25 seconds. A double shot, called a doppio, uses about 14–18 g of coffee and yields about 2 fl oz (50–60 ml), and it is the default in most American coffee shops today.

Whether you are ordering at a café or pulling shots at home, knowing what a shot of espresso actually is helps you get the drink you want. Here is a clear breakdown of single, double and doppio, plus the caffeine and the vocabulary you need.

What Is a Shot of Espresso, Exactly?

Espresso is a brewing method, not a type of bean. Any coffee can be brewed as espresso, although many people prefer medium-dark or dark roasts for their body and chocolate notes. Three things define a shot:

• Pressure: around 9 bar pushes water through a tightly packed puck of coffee.
• Fine grind: finer than drip coffee, close to powdered sugar but slightly gritty.
• Short time: most shots run about 25–30 seconds.

The result is a thick, intense drink topped with a layer of golden foam. Read why that foam forms in our article on espresso crema.

The Istituto Nazionale Espresso Italiano, an Italian organization that certifies espresso, describes a traditional single espresso as about 7 grams of coffee (plus or minus half a gram), brewed with water around 88°C (190°F) at 9 bar for about 25 seconds, giving roughly 25 ml in the cup. Many modern cafés use larger doses, but this is a good reference point.

Single Shot vs Double Shot (Doppio)

Doppio simply means “double” in Italian. A doppio is two shots' worth of espresso brewed together in a larger basket, not two separate shots poured into one cup.

Caffeine varies with the beans, roast, dose and extraction, so treat these numbers as estimates. A typical single shot is often cited at around 63–65 mg. Robusta-heavy blends contain noticeably more caffeine than 100% arabica. For a deeper look, see espresso vs drip coffee caffeine.

Why the double became the standard

Double baskets are easier to fill evenly and tend to give more consistent results, so many cafés pull doubles by default and split them when someone orders a single.

Ristretto, Lungo and Other Shot Styles

The same dose of coffee can be pulled shorter or longer:

• Ristretto: a “restricted” shot with less water, sweeter and more concentrated.
• Normale: the standard espresso described above.
• Lungo: a “long” shot with more water, lighter and more bitter.

We compare them side by side in ristretto vs lungo vs espresso. And if you add hot water after brewing, you get an americano or long black, explained in americano vs long black.

How to Order a Shot of Espresso

Coffee shop vocabulary can be confusing. Here is what to say:

• “An espresso” or “a single”: one shot. In Italy, just ask for “un caffè.”
• “A doppio” or “a double espresso”: two shots in one cup.
• “Add a shot”: an extra shot in a latte, cappuccino or iced drink.
• “Triple” or “quad”: three or four shots, common in large milk drinks.
• “Espresso macchiato”: a shot marked with a spoon of milk foam (see macchiato explained).

Not sure how many shots are in your usual drink? Just ask the barista. Shot counts vary by shop and cup size.

How to Pull a Good Shot of Espresso at Home

1. Weigh your dose: start with 18 g (about 0.63 oz) of freshly ground coffee in a double basket.
2. Distribute and tamp: level the grounds, then press firmly and evenly.
3. Brew: aim for about 36 g (about 1.3 oz) of liquid espresso in 25–30 seconds, a 1:2 ratio.
4. Taste and adjust: sour and thin means grind finer; bitter and harsh means grind coarser.
5. Use fresh beans: coffee roasted within the last few weeks gives better crema and flavor.

Our full guide to making espresso at home covers machines, grinders and troubleshooting.

Shot of Espresso FAQ

How many ounces is a shot of espresso?

A single shot of espresso is about 1 fl oz (25–30 ml), and a double shot is about 2 fl oz (50–60 ml). Exact volumes vary by café and recipe, and crema makes fresh shots look larger.

How much caffeine is in a shot of espresso?

A single shot usually contains roughly 60–75 mg of caffeine, and a double about twice that. The FDA cites up to 400 mg a day as generally safe for most healthy adults; people who are pregnant, have a medical condition or take medication should ask their doctor.

Is a doppio the same as a double shot?

Yes. Doppio is the Italian word for double, and a doppio is a double shot of espresso brewed with about twice the coffee of a single.

Is a shot of espresso stronger than a cup of coffee?

Per ounce, yes: espresso is much more concentrated. Per serving, a single shot usually has less caffeine than an 8 oz cup of drip coffee, which typically contains around 80–100 mg.

Conclusion

A shot of espresso is about 1 fl oz of concentrated coffee; a doppio doubles it. Once you know the terms, ordering and brewing get much easier. For rich, chocolatey shots, try our 6 Bean Blend or Italian Roast, and if you want espresso in the evening, the Decaf Espresso has you covered. Every Feel Espresso coffee is roasted 1–5 days before delivery.