How Much Coffee Is in a Shot of Espresso?

The answer in grams

The dose — how much ground coffee goes into the portafilter for a shot — is measured in grams, and the rough figures are these: a single shot uses about 7 to 9 grams, and a double uses about 14 to 18 grams. Modern espresso has drifted toward larger doubles, so 18 grams or a touch more is common today. These are ranges, not fixed rules, because the right dose depends on your basket and your beans — but if you have ever wondered whether you are using a sensible amount of coffee, a double in the mid-to-high teens of grams is the ballpark you want to be in.

Notice how much coffee that is relative to the drink. A double shot fits into a small cup, yet it contains as much ground coffee as a large mug of drip. That concentration is the whole point of espresso, and it is why the dose has to be right: there is no room for a rough guess when 18 grams is being packed into a shot the size of a couple of tablespoons.

The basket sets the dose

You do not pick the dose out of thin air — your filter basketsets it. Each basket is designed for a capacity: a single basket for a single dose, a double basket for a double, and there are larger triple baskets too. The basket's size determines how much coffee fits with the right amount of headspace above the tamped puck, and dosing to the basket's intended capacity is what gives you a puck that sits correctly under the shower screen.

This is why "how much coffee" and "single or double" are really the same question asked two ways — the basket you put in the portafilter chooses the dose. Put a double basket in and you dose it with a double's worth of coffee; put a single in and you dose less. Trying to force a big dose into a small basket, or a small dose into a big one, throws the whole shot off, which is part of why singles and doubles behave so differently, covered in single vs double shot.

Why weigh instead of scoop

The scoop that came with your machine is the enemy of consistency. A scoop measures volume, and the volume-to-weight of ground coffee varies with the bean, the roast and the grind — a scoop of one coffee weighs noticeably more than a scoop of another, and even the same coffee packs differently depending on how it settles. So "one scoop" is a different dose every time, and a dose that wanders makes every shot a fresh guess.

Weighing fixes this. A small coffee scale that reads to a tenth of a gram lets you put the same dose in the basket every single time, so the dose stops being a variable and becomes the fixed anchor it should be. It is genuinely the cheapest and highest-impact consistency upgrade in home espresso — cheaper than almost any accessory, and it removes an entire source of shot-to-shot variation. If you weigh nothing else, weigh your dose.

Dose sets the brew ratio

The dose also anchors the brew ratio — the relationship between how much coffee you put in and how much espresso you get out. A common target is around 1:2: roughly twice the weight of espresso out as coffee in, so an 18 gram dose yields about 36 grams of espresso in the cup. Tighter ratios (ristretto, nearer 1:1) give a shorter, more concentrated shot; wider ones (lungo, 1:3 and beyond) give a longer, more diluted one.

The important point is that the ratio is measured from the dose. Without a known, consistent dose, you cannot target a ratio, because you do not know your starting number — which is another reason the dose is the foundation everything else is built on. Working the dose and ratio together to land a balanced shot is exactly what dialling in espresso walks through, and a scale that fits on the drip tray lets you weigh the shot out as well as the dose in.

Why a consistent dose matters most

Here is the deeper reason to care, and it is not about hitting a magic number. When you change the grind to fix a shot — the main lever in espresso — you can only read the result if everything else stayed the same. If your dose also changed, you have moved two variables at once and you cannot tell which caused the difference. A wandering dose makes dialling in impossible, because it turns every adjustment into noise.

So the real value of a consistent dose is that it lets every otheradjustment mean something. Fix the dose, then change the grind alone, read the shot, repeat — that clean loop is only available to someone whose dose is nailed down. This is why experienced baristas obsess over dose consistency far more than over the exact gram count: the same dose every time is worth more than a "perfect" dose that varies.

How to dose well

In practice: pick the basket for the shot you want, find a dose that fills it with a little headspace above the tamped puck (start around the middle of the range for that basket and adjust), and then weigh that dose every time. Grind straight into the portafilter or a dosing cup on the scale, level and distribute the grounds, tamp evenly, and pull. Once the dose is fixed, use the grind to dial the shot's speed and the ratio to set its strength.

Get the dose consistent and most of the frustration goes out of home espresso, because you have removed the variable that quietly sabotages everything else. From there, the first shot checklist and dialling in take you the rest of the way, and the related basics are on the blog.