The coffee intensity scale: what the numbers on capsules really mean

The number everyone looks at and almost nobody can read

Almost every pack of capsules or pods carries a number, often with a coloured bar: intensity 5, intensity 9, intensity 12. It is the first thing customers look at and, in our experience, also the thing that causes the most confusion.

Let us start with the important part: intensity is not an official measurement, and there is no standard that defines it. It is an indication each roaster builds within its own range to say, in shorthand, how full, structured and persistent a blend is compared with the others from the same brand.

Put simply, the number describes the character of the coffee, not its strength in any chemical sense. In this guide we explain what actually drives it, what it does not mean, and how to use it to choose well without a string of trial-and-error purchases.

Intensity does not mean more caffeine

This is the most widespread misunderstanding, and we hear it practically every week: “I'll take intensity 12, it will wake me up better.” In fact these are two different things.

Perceived intensity comes mainly from taste: body, bitterness, roasted notes, persistence. The amount of caffeine in the cup depends on other factors, particularly the make-up of the blend and how much liquid you extract. A lungo, for example, tends to contain more caffeine than a ristretto of the same blend, simply because more water passes through — even though it tastes much lighter.

The variety matters too: robusta generally contains more caffeine than arabica, and it is the same variety that gives body, thick crema and that slightly bitter note typical of bar espresso. That is why more intense blends often contain more robusta — but the relationship is not a mathematical rule, and every roaster handles it its own way.

If you are looking for less caffeine in the cup, the right route is not to go down the intensity scale: it is to choose a decaffeinated option, now available across all the main systems. Many customers are surprised by how good these have become.

What actually determines intensity

Four elements, in order of weight.

The blend. The proportion of robusta to arabica moves the result most: more robusta generally means more body, more crema and a more bitter finish. Arabica-led blends are more aromatic, with livelier acidity and natural sweetness. You will find both families among the capsules and among the ground coffee and beans.

The roast. A darker roast brings toasted, cocoa and woody notes, lowers acidity and gives that “full” sensation many people associate with strength. A lighter roast keeps floral and fruity aromas and tastes lighter in the cup, even when the blend is excellent.

Dose and grind. Inside a capsule the dose is fixed by the manufacturer, but it varies from system to system; the grind decides how much resistance the water meets. With the same blend, these two parameters shift the structure in the cup more than anything else.

Extraction. And this is the part that is up to you: the same capsule pulled at 25 ml or at 60 ml gives you two different coffees. If a blend feels too strong, try lengthening it slightly before switching. If it feels weak, shorten it. It is the fastest — and free — way to fit the coffee to your taste.

Why different brands' scales cannot be compared

This is the part that settles most doubts at the counter. Every brand builds its scale only in relation to its own range. An 8 from one roaster can feel fuller than a 10 from another: neither of them is wrong, the references are simply different.

The span differs too: some ranges stop at 10, others go to 12 or 13. Comparing numbers across brands is therefore of little use, whereas comparing them within the same brand is very useful, because there the scale follows a consistent logic.

The practical advice we always give: use the number as a compass inside a range you already know, and when you switch brand start from the description — arabica or robusta, roast, stated notes — rather than the figure. That applies to compatible capsules from Borbone, Lavazza, Kimbo or Illy, as well as to ESE pods and whole beans.

How to choose the right number for you

Here is how we work through it with customers, without complicated formulas.

If you drink short espresso and want the bar cup, you will be happiest in the mid-to-high part of your chosen brand's scale. That is where the blends with more body and denser crema sit.

If you lengthen your coffee or drink it with milk, a mid-to-high intensity copes better with dilution: a delicate blend tends to disappear behind the milk in a cappuccino.

If you drink several coffees a day, come down a couple of points. Very intense blends are wonderful once or twice a day, but by the fourth cup they tire the palate.

If you love aromas more than structure — floral, fruity, citrus notes — stay at the lower end of the scale and look for arabica-led blends.

If there are several of you at home, the practical answer is to keep two reference points: one intense blend and one balanced. It is the simplest way to satisfy different tastes on the same machine, whether that is A Modo Mio®, Dolce Gusto®, Caffitaly® or Nespresso®.

The small things that change intensity in the cup

Before blaming the blend, it is worth checking three things. They are the same three that, in the shop, solve most cases of “it isn't what it used to be”.

Water. It is 98% of the cup. Very hard water flattens the aromas and, over time, leaves scale in the circuit. A filter or a dedicated descaler used regularly keeps the machine efficient and the coffee true to itself.

The cup. A thick, pre-warmed cup holds the temperature and protects the crema; a cold cup kills an espresso in seconds and makes it taste weaker than it is.

Storage. Capsules and pods have a protective barrier, but ground coffee and beans lose aroma quickly once opened: a sealed container, away from light and humidity, and never the fridge.

If you are unsure which intensity or which blend suits your machine, get in touch: our team is always happy to help you find what fits your taste.