Light vs. Medium vs. Dark Roast: How to Choose

Roast level is the first decision most coffee buyers make — and the one most often made on bad information.

The most persistent myths in coffee: that dark roast has more caffeine, that light roast is weak, that roast level is the primary driver of quality. All wrong. Here's what roast level actually does, and how to choose correctly.

What Roasting Does to a Coffee Bean

Roasting is a transformation. Green coffee beans — which smell like grain and grass — are subjected to high heat for 10 to 15 minutes. During that time, sugars caramelize, acids develop and break down, proteins degrade, and hundreds of volatile aromatic compounds are created.

Mechanically, the bean first dries, then browns. Once it's hot enough, the Maillard reaction — amino acids reacting with sugars — starts generating the brown colour and most of the roasty, nutty, chocolate aromatics, alongside caramelization of the bean's own sugars. Steam pressure builds inside until the cell structure fractures audibly: first crack, at roughly 196°C / 385°F. Push further and a second, quieter fracturing begins — second crack, around 224°C / 435°F — as the structure gives way again and lipid migration pushes oils to the surface. That's why dark roasts look shiny and light roasts look dry.

Across the roast, beans lose roughly 12 to 20% of their weight — mostly water — while expanding in volume, which is why dark roast beans are noticeably less dense. Roasters describe the back half of the roast with development time ratio (DTR): the share of total roast time spent after first crack, often somewhere in the neighbourhood of 20–25%. Colour is measured objectively on the Agtron colour scale, a reflectance reading where higher numbers mean a lighter roast — which is how two roasters can agree on what "medium" means without arguing about it.

Light roasts are pulled from the drum earlier. Dark roasts stay in longer. The degree of roasting determines which compounds develop and which are driven off — fundamentally changing the flavor of the cup.

Done badly, it shows up as named defects: baked (the roast stalled and dragged, leaving a flat, papery, lifeless cup), scorched (too much heat too early, burning the bean's surface), and tipping (blackened, blown-out bean tips from an aggressive charge). None of these are roast levels — they're mistakes, and they're the reason a "dark roast" can taste like an ashtray while another tastes like dark chocolate.

Roast Levels by Temperature: First Crack to Second Crack (°F Chart)

These are approximate ranges, not thresholds. Every roaster reads their own machine, bean density and moisture shift the targets, and the same drop temperature on two roasters can produce visibly different coffee. Treat the table as a map, not a recipe.

Roast Names Decoded: City, Full City, Vienna, French, and Italian

The trade names are older than the marketing labels, and they're more precise — they describe position relative to the two cracks rather than a vibe.

"French roast" and "Italian roast" describe a roast degree, by the way — not an origin and not a brewing tradition. Neither has much to do with what's actually served in France or Italy.

Light Roast

Flavor profile: Bright, complex, higher acidity. Light roasts preserve the most origin-specific flavors — the terroir of where the bean was grown. A light roast Ethiopian might taste like blueberry or jasmine. A light roast Colombian might have a citrus brightness that disappears completely at a darker roast.

Body: Light and tea-like compared to medium or dark.

Caffeine: Marginally ahead of the others by the scoop, because the beans are denser — but the difference is small. Full explanation below.

Best for: Pour over, cold brew, and coffee drinkers who want to explore origin character. Not ideal for espresso as a starting point. If you want to taste a great light-medium single origin, try Wake The Dead, our bright Colombian, or browse the lighter end of the lineup in the Bone Yard.

Medium Roast

Flavor profile: Balanced. The sweet spot for most drinkers. Caramel sweetness, moderate acidity, more developed body than light roast. Origin characteristics are still present but less pronounced — this is where chocolate, nut, and caramel notes emerge most reliably.

Body: Medium — fuller than light, lighter than dark.

Caffeine: Effectively the same as light roast. Not a reason to choose either way.

Best for: Drip coffee, pour over, and most espresso applications. The versatile choice. Works well with or without milk. Our signature medium is Grave Shift — the easiest first order in the catalog — and you'll find the rest of our mediums in the Crossroads.

Dark Roast

Flavor profile: Bold. Full-bodied. Lower acidity. Notes of dark chocolate, toasted nuts, and sometimes a pleasant smokiness. Origin character is largely driven off by the extended roasting — a dark roast Guatemalan and a dark roast Ethiopian may taste more similar to each other than their light roast counterparts would.

Body: Heaviest. Most tactile, most coating mouth-feel.

Caffeine: Slightly less per scoop, because dark roast beans are less dense — not because roasting destroys caffeine. See the next section.

Best for: French press, espresso, and drinkers who enjoy coffee black and bold, or with milk in lattes and cappuccinos. Reach for Dead Man's Brew, our boldest Brazilian, or explore the full dark lineup in Death Row.

Does Dark Roast Have Less Caffeine? The Weight vs. Scoop Answer

The honest answer has two halves, and almost every argument about this happens because people are using different ones.

By weight, roast level barely matters. Caffeine is remarkably heat-stable at roasting temperatures, so 20 g of light roast and 20 g of dark roast carry roughly equivalent caffeine. If you weigh your coffee — and you should — switching roasts changes your dose by essentially nothing.

By the scoop, dark roast comes out slightly lower. Roasting drives off 12–20% of the bean's weight while the bean expands, so dark roast beans are less dense. A scoop is a fixed volume, so a scoop of dark roast simply holds less coffee — and therefore slightly less caffeine.

That's the entire effect. It's a density artefact of measuring by volume, not a property of the roast. Roast colour is not a meaningful caffeine lever. If you want more caffeine, raise the dose, brew a bigger volume, or pick a brew method that extracts harder — the numbers for each are in how much caffeine is in a cup of coffee. And if the real goal is a bolder cup rather than more caffeine, our guide to brewing strong coffee at home is the better read.

Which Roast Is Best for Each Brew Method?

None of these are rules. They're the pairings that are easiest to get right, because each brew method flatters a different part of the roast spectrum.

Whichever pairing you pick, dose matters more than roast: get the ratio right first with our coffee-to-water ratio guide.

A Quick Decision Framework

• You reach for cream and sugar: start with medium
• You drink it black: go dark, or experiment with light
• You're a coffee nerd interested in origin: go light and pay attention

What Actually Determines Quality

Neither dark roast nor light roast is inherently better. What matters most is the quality of the green coffee, the skill of the roaster, and freshness. A freshly-roasted light roast of a high-quality Ethiopian single-origin will outperform a stale grocery store dark roast in a way that's immediately obvious — not because of the roast level, but because of everything else.

Not sure where to start? Our best sellers are the no-regrets first order — every coffee roasted after you order.

Related: Arabica vs. Robusta | Coffee Origins Explained | French Press Guide | How Much Caffeine Is in a Cup of Coffee?