Coffee roast levels explained: light, medium and dark
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Coffee roast levels shape how a coffee tastes: fruity and lively, round and sweet, or bold and chocolatey. Here you'll learn what happens during roasting and which roast level suits your brewing.
At a glance
- Light
- fruity, lively acidity – ideal for filter
- Medium
- sweet, nutty, balanced – versatile
- Dark
- bold, chocolatey – for espresso
- Caffeine
- barely any difference
- Brewing
- lighter = finer and hotter
What happens during roasting
Green coffee is dense and tastes grassy. Only the heat of the roaster transforms it: the beans lose water, turn light brown and then darker and darker. Sugars caramelise, the Maillard reaction creates hundreds of aroma compounds, and acids gradually break down. At around 200 °C you hear a distinct cracking sound, the first crack: steam and carbon dioxide break open the bean's cell structure. If roasting continues, the quieter second crack follows a few minutes later, and oils start to reach the surface.
As a rule: the lighter the roast, the more of the origin's character remains. The darker it gets, the more the roast flavours themselves shape the taste.
Roast levels compared
| Roast | Flavour | Acidity | Body | Best for |
|---|---|---|---|---|
| Light | fruity, floral, tea-like | high | light | V60, pour-over, AeroPress |
| Medium | sweet, caramel, nuts, chocolate | medium | medium | filter, French press, bean-to-cup |
| Dark | dark chocolate, roasty | low | full | espresso, milk drinks |
Light, medium and dark roasts in detail
Light roast
Stopped shortly after the first crack. Light roasts highlight origin: lively acidity and floral, fruity notes such as berries, citrus or stone fruit. They are the classic choice for filter coffee, V60 and AeroPress.
Medium roast
The balanced middle ground: less acidity, more sweetness and body, notes of nuts, caramel or milk chocolate. Medium roasts are versatile and work in a filter as well as in a French press or as a milder espresso.
Dark roast
Roasted for longer, often close to the second crack. Low acidity, full body, flavours of dark chocolate and roasty notes. Dark roasts are the classic choice for full-bodied espresso and milk drinks.
Roast level and freshness
The roast level also affects how long a coffee needs to rest and how quickly it ages. Light roasts are denser and release their carbon dioxide more slowly; they often taste best after a few days' rest and stay aromatic for longer. Dark roasts are more porous, degas faster and lose their aroma sooner. So buy dark roasts in smaller amounts and use them up quickly.
How to find your roast level
- Decide on your brew method. Think about what you mostly brew with – filter, French press, espresso machine or bean-to-cup. The table above shows which roast levels suit it.
- Clarify your taste. Do you like coffee with fruit and acidity, or rather round, sweet and chocolatey? That is the most important question.
- Compare two roast levels. Brew a light and a darker coffee one after the other using the same recipe. Side by side, the differences are clearest.
- Adjust your recipe. Light roasts often need a finer grind and hotter water; dark roasts a slightly coarser grind and 90–92 °C.
- Check the roast level on the product page. Every product page shows the coffee's roast level on a scale from light to dark.
Mistakes & myths
“Darker means stronger”
Strength comes from the amount of dissolved coffee in the cup – in other words, dose and extraction – not from the colour of the bean. A dark coffee tastes bolder but isn't automatically stronger. If you want more intensity, use more coffee.
“Dark roasts have more caffeine”
The difference between roast levels is small. Far more important are the species – Robusta contains roughly twice as much caffeine as Arabica – and how much coffee you use.
“Light roasts taste sour”
A pleasant, fruity acidity belongs to light roasts. But if the coffee tastes sharply sour and thin, it is usually under-extracted: grind finer and brew with hotter water – our grind size chart helps.
“Oily beans have gone off”
With dark roasts, oils migrate to the surface – that's normal. Very oily beans are less suitable for bean-to-cup machines, though, because they can clog the grinder.
Frequently asked questions
Which roast level is best for espresso?
Classically medium to dark: these roasts bring sweetness, body and low acidity and work well with milk. Light espresso roasts are possible but need more fine-tuning – see our espresso guide.
Which roast level is best for filter coffee?
Light to medium. That is where filter coffee shows its origin flavours most clearly.
Why do some coffees say “light-medium” or “medium-dark”?
Roast levels are a spectrum. In-between levels describe coffees that sit between two categories – for example a medium roast with a little more brightness.
Which roast level suits a bean-to-cup machine?
Medium to medium-dark. Very light roasts quickly taste sour in a bean-to-cup machine, while very dark, oily beans can clog the grinder. Find out more in our bean-to-cup guide.
Can I mix different roast levels?
Yes – that is essentially a blend. Ideally mix coffees with a similar roast level so they extract evenly.
Discover coffees by roast level
Every product page shows the coffee's roast level on a scale from light to dark.
Shop all coffees