How Coffee Beans Are Graded Around the World

Ever spotted strange acronyms like 'SHB' or 'AA+' on your coffee bag and wondered what they actually mean? With no global standard, each coffee-growing country uses its own system to grade beans — leaving many specialty coffee drinkers confused about what those labels really tell them.

In short: coffee grading varies by country. Some use altitude (like SHB for high-grown beans), others sort by bean size (like Kenya’s AA) or defect counts (like Colombia’s G1/G2). These grades hint at quality but don’t guarantee flavor — though higher-altitude beans often have better cup potential.

Why Coffee Grading Systems Differ Worldwide

Coffee-growing regions developed their own grading rules based on local conditions, export needs, and historical practices. There’s no universal standard — meaning a 'G1' in Colombia isn’t the same as a 'SHB' in Honduras or 'AA' in Kenya. Roasters might include these grades on single-origin bags, but most commercial blends leave them off entirely.

Altitude-Based Grading: The Higher, The Harder

Central American countries, including Honduras and Guatemala, grade beans by growing elevation. Beans grown above 4,500 feet (about 1,370 meters) are labeled 'SHB' (Strictly Hard Bean). The higher the altitude, the slower the cherry ripens, leading to denser beans with more complex potential flavors. While 'SHB' doesn’t describe taste directly, it’s a reliable marker for quality-focused origins.

Size and Defect Sorting: Kenya and Colombia’s Methods

Kenya uses a multi-tiered system based on bean size and defect rates. Its top grade is 'AA+' — reserved for exceptionally flavorful lots with minimal flaws. 'AA' beans are the largest in size, followed by smaller 'AB' beans. 'PB' denotes peaberry beans, which form when a single round seed develops instead of two flat ones. Meanwhile, Colombia grades primarily by bean size and defect count: 'Supremo' beans are the largest, while 'Excelso' are slightly smaller. Grades like G1 and G2 refer to defect-free or near-defect-free lots — with G1 being the cleanest. Notably, larger bean size doesn’t correlate with better flavor, though high-altitude origins often produce both denser beans and more nuanced cups.

What Actually Influences Coffee Quality

While grading systems offer clues, the true drivers of coffee quality include growing altitude, processing method (washed, natural, or honey), varietal (like Typica or Geisha), and post-harvest handling. Density (often tied to altitude) matters more than physical size — denser beans typically roast more evenly and develop richer flavors during extraction. Defect counts (like black beans or insect damage) directly impact cup cleanliness and sweetness. That’s why specialty roasters focus on these factors over grade labels alone.

Frequently Asked Questions

What does 'SHB' mean on a coffee bag?

'SHB' stands for 'Strictly Hard Bean,' a Central American grade for beans grown at elevations above 4,500 feet (about 1,370 meters). These beans are denser due to slower ripening at high altitudes, often leading to better cup quality — though the label doesn’t guarantee flavor, just growing conditions.

Is 'AA' coffee better than 'AB'?

In Kenya’s system, 'AA' refers to the largest bean size, while 'AB' is slightly smaller. While 'AA' beans are often sorted for higher-quality lots, size alone doesn’t determine flavor. Many 'AB' beans from top farms can outperform poorly processed 'AA' beans. Kenya also uses 'AA+' for exceptional lots with minimal defects.

What’s a peaberry coffee bean?

A peaberry (labeled 'PB' in Kenya) is a single round coffee seed that forms instead of the usual two flat seeds in a cherry. They occur in about 5% of all coffee and are often sorted separately. Peaberries can have more concentrated flavors, but quality varies — they’re not inherently better, just different.

Do G1 and G2 grades mean the same thing everywhere?

No. In Colombia, G1 and G2 refer to defect counts — with G1 having the fewest flaws. But in other countries, these letters might mean something entirely different. Always check the origin to understand what the grade signifies.

Why don’t all coffee bags show a grade?

Most commercial or blended coffees don’t highlight grading because it’s not relevant to their marketing. Single-origin specialty roasters are more likely to include grade info (like SHB or G1) to signal quality — but even then, it’s just one factor among many in evaluating a coffee’s profile.

Recommended FrontStreet Beans for Altitude & Grade Insights

Try FrontStreet Coffee’s Ethiopia Yirgacheffe G1 for a bright, floral washed Ethiopian lot — a G1 grade highlights its clean, defect-free processing. For Kenyan-style grading, their Kenya AB offers balanced acidity and fruit notes, showcasing how size doesn’t always define flavor. And their Colombia Supremo reveals how large-bean Colombian coffees can still deliver smooth, nutty profiles despite altitude differences. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.