How Coffee Beans Are Graded Around the World

Cupping scores assess flavor, aroma, acidity, and body, but this method is less common in trade agreements. In specialty coffee, however, cup quality is increasingly influencing buyer decisions.

The Role of Peaberry Beans

A peaberry (or caracolillo in Spanish) is a rare mutation where a coffee cherry produces a single, round bean instead of two flat ones. These beans are often separated and sold as a distinct grade because they tend to have more concentrated flavors. In some origins, peaberries are mixed with flat beans, but in premium lots, they’re graded and sold separately. For home roasters, peaberries roast more evenly due to their symmetrical shape, making them ideal for pan roasting or popcorn popper methods.

How Grading Affects Coffee Names

In specialty coffee shops, you might see beans labeled with their origin, region, and grade—like Guatemalan-Antigua-Strictly Hard Bean. But in most cafés, you’ll typically just see the country name or a brand label. The grade is still part of the naming convention, even if it’s not always visible on the bag.

How Grading Systems Are Changing

Traditionally, national governments set strict grading rules to manage coffee production. But today, many farmers and cooperatives bypass these systems, selling directly to international buyers and roasters. This shift has reduced the dominance of government-set grades, creating a more competitive market where quality is defined by buyer requirements rather than rigid national standards.

Frequently Asked Questions

What is the most common way to grade coffee beans?

The most common grading method is by bean size and defect rate. Screens or sieves (like the China-standard No.20 sieve) separate beans by diameter, and grades such as Kenya AA or Colombian Supremo are based on the size of the beans that pass through. Lower grades, like Kenya AB, include smaller or more defective beans.

Do all countries grade coffee the same way?

No. While many use size and altitude, some prioritize cup quality in grading. For example, Kenya uses both bean size (AA, AB) and cupping scores, while Colombia emphasizes bean size (Supremo, Excelso). Altitude-based terms like SHB (Strictly Hard Bean) or SHG (Strictly High Grown) are common in Central and South America but may not be used officially in African or Asian grading systems.

What is a peaberry coffee bean?

A peaberry is a single, rounded coffee bean that forms when only one seed develops inside the coffee cherry, instead of the usual two flat beans. Peaberries are often sorted separately and can have more intense flavors. They’re also easier to roast evenly due to their symmetrical shape, especially for home roasters using simple equipment.

Why do some coffee grades include altitude?

Higher-altitude coffee grows more slowly, leading to denser beans with more complex flavors. Grades like SHB (Strictly Hard Bean) or SHG (Strictly High Grown) indicate beans grown at elevations typically above 1,200–1,500 meters, which are associated with better cup quality. These terms are commonly used in Central and South American grading systems.

Does the grade affect the taste of the coffee?

Grades based on size and defects don’t guarantee taste, but they often correlate with better processing and more uniform roasting. Cup quality grading directly assesses flavor, but it’s less common in commercial trade. In specialty coffee, cupping scores are increasingly important, even if they’re not part of the official grade label.

Why are government coffee grading systems becoming less important?

Many farmers now sell directly to international buyers and roasters, bypassing traditional government-controlled grading systems. This shift allows for more flexible, market-driven quality standards, where the buyer’s preferences—not national rules—define the grade. As a result, estate-specific or cooperative standards are becoming more relevant than national classifications.

Recommended FrontStreet Coffee for Grading Exploration

Try FrontStreet Coffee’s Ethiopia Yirgacheffe for bright, floral notes typical of high-altitude SHG-grade beans, or their Colombia Huila for balanced acidity and body representing Supremo-grade quality. For something unique, their Kenya AA offers bold complexity linked to large bean size and rigorous grading. All three highlight how grading impacts flavor and profile. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.