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The short answer: the three main coffee roast levels are light, medium and dark, with medium-dark sitting between the last two. Roasters stop light roasts early, so they taste brighter and fruitier. Medium roasts are balanced and sweet, while roasters take dark roasts further for a heavy, bitter-sweet, smoky cup with little acidity. If you are not sure where to start, a medium roast is the easiest all-rounder for most home brewers.
Roast level is one of the most useful things printed on a bag of beans. However, coffee roast levels are not standardised. One roaster’s “medium” can look like another’s “medium-dark”. This guide explains what actually changes during roasting, how each level tastes, which suits your brewing method and what the labels on UK bags really mean.
How are coffee roast levels created?
Coffee starts life as a hard, green seed with a grassy smell. First, roasting heats it until sugars caramelise and hundreds of aroma compounds form. The beans turn from green to yellow, then through shades of brown, and lose water and weight as they go.
Two audible milestones help roasters judge the level. First crack is a popping sound, a bit like popcorn, as moisture and gas escape from the bean. Most coffee roasting references put it at roughly 196°C bean temperature. Crack is a quieter, faster crackle that starts at roughly 224°C, when the bean structure begins to break down and oils move to the surface. As a result, where the roaster stops relative to these two cracks largely decides the roast level.
The main coffee roast levels at a glance
| Roast level | When it is stopped | Look | Typical flavour | Good for |
|---|---|---|---|---|
| Light | At or just after first crack | Light brown, dry surface | Bright, fruity, floral, tea-like | Pour over, AeroPress, filter |
| Medium | Between first and second crack | Mid brown, dry or satin surface | Balanced, caramel, chocolate, nutty | Cafetière, filter, bean-to-cup, espresso |
| Medium-dark | Around the start of second crack | Rich brown, a few oil spots | Bitter-sweet, dark chocolate, fuller body | Espresso, milk drinks, moka pot |
| Dark | Well into second crack | Very dark brown to nearly black, oily | Smoky, roasty, bitter, low acidity | Strong milky coffee, traditional espresso |
What does a light roast taste like?
Light roasts keep more of the character of where the coffee was grown. Expect higher acidity, which in coffee means a juicy brightness rather than sourness, plus fruity, floral or citrus notes and a lighter body. For this reason, many speciality roasters use light roasts for single origin coffees, because they let the farm and variety show through.
However, light roasted beans are denser and harder, so they can be trickier to extract. If a light roast tastes sour or thin, try a slightly finer grind, water just off the boil, or a longer brew. Our coffee grind size chart shows where to start for each method.
What does a medium roast taste like?
Medium roasts trade some of that brightness for sweetness and body. Caramel, milk chocolate, nuts and toffee are typical notes, with enough acidity to stay lively. In fact, it is the most forgiving of the coffee roast levels: it tastes good black or with milk and works in almost any brewer, which is why so many house blends sit here.
Our own everyday coffee is a medium roast: 200 Degrees Brazilian Love Affair. It is the coffee we drink most at home and our favourite from 200 Degrees. The roaster describes it as its signature espresso blend, the one served in its shops, medium roasted with plenty of body, a great crema and a strong, bold finish.
Check Brazilian Love Affair at 200 Degrees
What does a dark roast taste like?
Roasters take dark roasts well past second crack. As a result, oils rise to the surface, acidity drops right down and the flavour comes mainly from the roasting itself: smoky, roasty, bitter-sweet, sometimes with a burnt edge. You taste less of the origin and more of the roast. Labels such as French, Italian or continental roast usually describe this end of the scale.
On the plus side, dark roasts stand up well to lots of milk and sugar, which is why they are popular for traditional Italian-style espresso. One practical note: very oily beans can clog the built-in grinder on some bean-to-cup machines, so check your manual before buying a very dark roast for one. Our bean-to-cup machine guide covers this in more detail.
Which of the coffee roast levels is strongest?
It depends what you mean by strong. Dark roasts taste stronger because of their bold, bitter flavour, but roasting changes caffeine very little. Weight for weight, light and dark roasts contain broadly similar caffeine. That said, dark beans lose more mass and are less dense, so if you measure by the scoop rather than by weight, a scoop of light roast holds slightly more coffee and slightly more caffeine.
If you want a stronger cup in the sense of more flavour, the brew ratio matters far more than the roast. Our guide on how to make strong coffee without making it bitter explains how to adjust it.
What do the strength numbers on UK coffee bags mean?
Many coffees sold in UK supermarkets carry a strength number on the pack, often on a scale of 1 to 5 or 1 to 6. In practice, this usually tells you about roast darkness and intensity of flavour rather than caffeine content. A higher number generally means a darker, stronger-tasting roast. By contrast, speciality roasters rarely use these numbers and instead describe the roast level and tasting notes.
Which of the coffee roast levels suits your brewing method?
- Pour over and AeroPress: light to medium roasts, which show clarity and sweetness in clean, paper-filtered cups.
- Cafetière: medium to medium-dark roasts suit its fuller, heavier body.
- Espresso: medium to medium-dark roasts are the easiest to dial in. Lighter espresso roasts can be delicious, but they are less forgiving.
- Moka pot: medium-dark roasts suit its intense, stovetop style.
- Bean-to-cup: medium roasts with a dry surface are the safest choice for built-in grinders.
- Cold brew: medium to dark roasts give the chocolatey, low-acid flavour most people want.
If you are new to brewing at home, our complete beginner’s guide to brewing coffee walks through each method step by step.
Frequently asked questions
Is espresso one of the coffee roast levels?
No. Espresso is a brewing method. Roasters usually design beans labelled “espresso roast” as medium to dark roasts that taste balanced when brewed under pressure, but you can pull espresso from any roast.
Does light roast have more caffeine than dark roast?
Only slightly, and mainly when you measure by volume. By weight the difference is small enough that most people will not notice it.
Why are some coffee beans shiny and oily?
Oil on the surface is a sign of a darker roast, because as the bean passes second crack its structure breaks down and oils migrate outwards. Lighter roasts usually look dry and matt.
How can I tell coffee roast levels apart if the bag does not say?
Look at the colour and surface. Light brown and dry suggests a light roast, mid brown and dry suggests medium, and dark brown with oily patches suggests medium-dark to dark. Tasting notes also help: fruit and florals point to lighter roasts, chocolate and caramel to medium, and smoky or roasty notes to dark.
The bottom line
Light roasts are bright and fruity, medium roasts are balanced and sweet, and dark roasts are bold, bitter-sweet and low in acidity. In short, choose between coffee roast levels by the flavour you enjoy and the way you brew, not by the idea of strength. If you want one bag that does everything, start with a medium roast such as Brazilian Love Affair, and if it becomes your daily coffee too, 200 Degrees also offers it as a Brazilian Love Affair subscription. Whatever you buy, grind it fresh with a decent burr grinder; our best burr grinders guide can help.
