8 Coffee Roast Levels Explained for Specialty Coffee

If you’ve ever stood in front of a coffee shelf wondering whether a ‘light roast’ or ‘dark roast’ will suit your taste, you’re not alone. Roast level dramatically changes how coffee tastes—from bright and acidic to deep and smoky—yet terms like 'city' or 'French' roast often lack clear meaning. Understanding these levels helps you choose beans that match your preferences.

There are 8 standard coffee roast levels, judged by roast timing, color (from light gray to black), aroma (from mild to intense), and the two key 'crack' sounds during roasting. These levels range from very light (used mostly for testing) to extremely dark (designed for espresso). Each has distinct flavors, body, and acidity suited to different brewing methods.

How Roasters Judge Roast Level

Experienced roasters assess roast development through three main cues: sound, color, and aroma. The coffee bean undergoes two audible cracking sounds during roasting. The first crack—starting around the 7-minute mark in heat-resistant beans—signals the beginning of pyrolysis, where starch turns to caramel, moisture evaporates, and gases release. This crack is low-pitched. The second crack, occurring near the 12-minute mark, is sharp and intense, indicating cell structure breakdown and deeper roast development.

Color shifts gradually from light grayish-beige to dark brown or black, while aroma intensifies from faint grassiness to rich, smoky, or even chocolaty notes. These observable traits help roasters determine when to drop the beans.

The Science: Agtron Numbers and Roast Color

The Specialty Coffee Association of America (SCAA) uses Agtron numbers—a measure of reflectance derived from infrared spectroscopy—to objectively classify roast levels. The Agtron scale ranges from 0 to 100. Higher values indicate lighter roasts: low caramelization, grayish beans, and minimal roast influence. Lower Agtron numbers show darker roasts, with high caramelization, shiny black surfaces, and heavy roast development. This quantitative method complements the subjective assessments of color and aroma.

The 8 Coffee Roast Levels: Flavor & Timing Breakdown

Coffee roast levels are commonly grouped into light, medium, and dark categories—but within those, there are eight widely recognized stages, each with specific drop times, visual cues, and flavor outcomes. These can vary slightly by region, but here’s how they generally break down:

• Light Roast : Dropped just before or at the start of first crack. Color: light cinnamon. Flavor: strong grassy notes, thin body, minimal aroma. Commonly used for internal testing, rarely for drinking.
• Cinnamon Roast : Dropped at the beginning to peak of first crack. Color: cinnamon brown. Flavor: grassiness fades; bright acidity and mild aroma emerge. Often used for American-style drip coffee.
• Medium Roast : Dropped during the peak to end of first crack. Color: chestnut brown. Flavor: balanced acidity and bitterness, moderate aroma, preserves original bean character. Good for American or blend coffees.
• High Roast : Dropped at the end of first crack. Color: light reddish-brown. Flavor: clean, vibrant, with balanced acid and bitterness, slight sweetness. Popular in Japan and Central/Northern Europe; suitable for Blue Mountain and Kilimanjaro beans.
• City Roast : Dropped between first and second crack. Color: light brown. Flavor: bright and lively, with a balanced profile where acidity is slightly subdued. Highlights the bean’s best qualities. A crowd favorite, great for Brazilian or Colombian beans, often used in French press.
• Full City Roast : Dropped at the start of second crack. Color: brown. Flavor: full-bodied, bold, with stronger bitterness than acidity and a sweet finish. Aromatic and rich. Common in Latin American and South American roasting styles. Ideal for cold brew and black coffee.
• French Roast : Dropped during the dense phase to end of second crack. Color: dark brown to blackish. Flavor: intense, smoky, with heavy bitterness and nearly no acidity. Notes of chocolate and roast dominate. Popular in France and Northern Europe; suited for café au lait or Viennese coffee.
• Italian Roast : Dropped from the end of second crack to when beans turn oily and black. Color: black with an oily sheen. Flavor: harsh, complex, extremely bitter with dominant roast and carbonized tones. Primarily used for espresso in Italy and Latin America.

In short: the lighter the roast, the more acidity and origin character shine through; the darker the roast, the more bitterness, body, and roast-driven flavors come forward.

How to Choose the Right Roast Level

Selecting a roast level depends on both the bean’s inherent traits and your taste preference. Beans with naturally low acidity or high bitterness often perform better at lighter to medium roasts. Conversely, beans with delicate floral or fruity notes may shine at a city or full city roast. Dark roasts mask origin characteristics but emphasize bold, smoky, and bitter profiles—ideal for espresso or milk-based drinks.

Frequently Asked Questions

What is the first crack in coffee roasting?

The first crack is the initial loud, low-pitched popping sound beans make around 7 minutes into roasting, caused by moisture rapidly escaping and internal pressure building. It signals the start of significant chemical changes like starch converting to sugar and is typically when light to medium roasts are dropped.

What is the second crack in coffee roasting?

The second crack occurs around 12 minutes in, producing a higher-pitched, more intense sound. It results from the breakdown of bean cell walls and indicates a much darker roast. Roasts like French and Italian are dropped during or after this stage.

What does Agtron mean in coffee roasting?

Agtron is a numerical scale (0–100) that measures roast color via infrared reflectance. Higher Agtron numbers (lighter roasts) indicate minimal caramelization and pale bean surfaces. Lower numbers (darker roasts) mean more caramelization, oil development, and dark coloration.

Which roast level highlights the coffee’s origin flavors best?

Light to city roasts (like Light, Cinnamon, Medium, or City) best preserve the unique tasting notes of the coffee’s origin, such as fruit, flower, or spice characteristics, because they involve lighter roast influence.

When should I use a dark roast like French or Italian?

Use dark roasts for strong, bold coffee experiences—especially in espresso, milk drinks, or when you prefer a smoky, bitter, and less acidic cup. French is popular in France, while Italian roast is standard for traditional espresso.

Can I use any roast level for pour-over or French press?

Yes, but lighter to medium roasts (like City or Full City) are usually preferred for pour-over to highlight clarity and origin notes. French press can handle fuller roasts (like Full City or French) for a heavier body and richer mouthfeel.

Recommended FrontStreet Beans for Roast Exploration

Try FrontStreet Coffee’s Ethiopia Yirgacheffe for a bright City-level showcase of citrus and floral notes; their Colombia Huila offers balanced Medium-body with chocolate and nuts; for darker profiles, their Sumatra Mandheling brings earthy depth ideal for French or Italian roasts. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.