How Coffee Beans Are Graded Around the World

Ever bought a bag of 'AA' or 'SHB' coffee beans and wondered what those letters really mean? Coffee quality grading isn’t universal—each producing country uses its own system based on local factors. That makes understanding what’s inside the bag tricky unless you know the grading rules for that origin.

In short, coffee is graded by bean size, defect count, cup quality, density, and sometimes altitude. Most countries use standardized sieves to define bean size, while defect tolerance (like black or broken beans) and altitude (for hardness) vary by region. These factors determine not just grade, but market price and roast potential.

Why Coffee Grading Differs by Country

There’s no global standard for coffee bean grading. Instead, each coffee-producing nation sets its own criteria based on the characteristics of its beans. A sample is taken from a bag and evaluated according to that country’s standards. These evaluations determine the coffee’s grade—and ultimately, its perceived quality. Most grading systems look at:

• Bean shape, size, and color uniformity
• Number of defective beans in a sample
• Cup quality, including flavor and body
• Processing method (washed or unwashed)
• Roast potential and bean density

The terminology and thresholds vary widely. But there’s one constant: most countries use standardized sieves to measure bean size. That means buyers can understand ‘large’ or ‘small’ beans without needing to know the producer’s perspective.

Country-Specific Grading Systems

Different origins have developed unique grading language based on local growing conditions and traditions. Here’s how some major producers do it:

Kenya

Kenyan coffee often uses simple terms like ‘AA’ (screen size 17/18) along with a number for cup quality on a 1–10 scale (e.g., AA 90 means 9/10 cup score). Despite the plain labels, Kenyan coffees are consistently ranked among the best in the world.

Central America & the Caribbean

Countries like Costa Rica, Guatemala, and Nicaragua grade by altitude:

• Costa Rica: LGA (Low Grown Atlantic), MGA (Medium), HGA (High), and HB (Hard Bean), MHB, GHB, SHB (Strictly Hard Bean) for higher altitudes.
• Guatemala: From 700–1700m, grades include Good Washed, Extra Prime Washed, Semi Hard Bean (SH), Hard Bean (HB), Fancier Hard Bean, and SHB (Strictly Hard Bean).
• Nicaragua: Also uses regional names alongside altitude-based grades.

The higher the altitude, the harder and denser the bean—factors that improve cup quality and command premium pricing.

Brazil

Brazil uses a detailed system considering:

• Bean size and color
• Density and shape
• Roast potential
• Cup quality
• Processing method
• Tree age and batch number

Defect counts are critical too—for example, NY refers to ‘New York’ standards, and ‘Standard 3’ allows 12 defects per 300g sample (including stones or twigs).

Ethiopia

Grading is simpler: processing method, origin name, and a grade number from 1 to 8. The number indicates the allowed number of defects per sample.

Indonesia

Recently updated its Dutch system. Now uses:

• R for Robusta, A for Arabica
• WP for washed, DP for dry processed
• Grades 1–2 (high), 3–4 (medium), 5–6 (low)
• AP (after polished), L/M/S for bean size (large/medium/small)

Example: ‘A/WP Grade 3/AP’ is a medium-grade, polished Arabica; ‘R/DP Grade 2L’ is high-grade large Robusta.

Coffee Grading Terms You Should Know

Some defect and grade terms are widely recognized, though definitions may shift slightly by origin:

• Black Bean: Defective, overripe, insect-damaged, or contaminated beans
• Golden Bean: Medium-large in size
• Broken Bean: Fragile, fragmented during hulling
• Brown Bean: Over- or under-fermented Arabica
• Discolored Bean: Unusual color indicating poor processing
• Elephant Ear: Mutated cherry with one large and one small bean (flavor unaffected)
• Elephant Bean: Large bean variety (e.g. Maragogype), prized for mild cup
• Floater: Low-density, immature, or overripe beans
• Foxy Bean: Overripe or fermented beans with reddish hue
• Hard Bean (HB): Mid-altitude Arabica, denser than lower-grown
• Hull Coffee: Dry-processed beans before husk removal
• Natural Bean: Dry-processed (unwashed)
• Pale Bean: Underripe, leads to weak roast color
• Peaberry (PB): Single round bean inside cherry (higher-priced)
• Pod: Cherry remnants around bean (a defect)
• Pulper-Nipped: Damaged during pulping
• Quaker: Underdeveloped bean (not always same as Pale)
• Ragged: Stunted from drought
• Stinker: Rotten bean, detectable under UV light
• Strictly Hard Bean (SHB): High-altitude Arabica, dense and flavorful
• Strictly High Grown (SHG): Synonymous with SHB
• Triage: Lowest grade, not for export
• Unwashed: Dry-processed
• Washed: Wet-processed
• Yellow Bean: Dried-too-long Arabica, pale in roast

These terms help identify defects and processing types that directly affect taste and roastability.

Frequently Asked Questions

What does SHB mean on coffee bags?

SHB stands for Strictly Hard Bean, typically used for high-altitude Arabica coffee. These beans are denser and grow at elevations usually above 1,200–1,500 meters. The term is common in countries like Guatemala and Costa Rica, and indicates a higher-quality, harder bean suited for premium roasts.

Why do some countries grade coffee by altitude?

Higher-altitude coffee grows more slowly, producing denser beans with better flavor complexity. Countries like Costa Rica, Guatemala, and Ethiopia use altitude as a proxy for bean hardness and cup quality. Terms like SHB (Strictly Hard Bean) or SHG (Strictly High Grown) often correlate directly with altitude bands.

What are coffee defect types and why do they matter?

Defects include black beans, broken beans, quakers, and floater beans—all of which can negatively impact flavor. Grading systems count these defects to determine the overall quality grade of a coffee lot. Fewer defects generally mean better cup quality and a higher grade.

How is bean size determined in coffee grading?

Most countries use standardized sieves (often a China-standard No. 20 sieve or similar) to sort beans by size. This allows for objective comparison regardless of origin. Size often correlates with bean density and processing consistency, influencing roast quality.

What’s the difference between washed and natural processed coffee in grading?

Washed (wet-processed) and natural (dry-processed) coffees are graded differently because their processing affects appearance, defect types, and cup profiles. Grading systems account for processing method as part of the overall quality assessment, with washed coffees often having stricter defect tolerances.

What is a peaberry coffee bean?

A peaberry is a rare, small, round bean that forms when only one seed develops inside a coffee cherry instead of two. Often sorted separately, peaberries are known for more concentrated flavor and often command a premium price, though they’re not always better—they’re just different.

FrontStreet Coffee Beans for Grading Exploration

Try FrontStreet’s Ethiopia Guji Natural for a wild, fruit-forward profile from a dry-processed origin—great for seeing how natural beans differ in grading. Their Colombia Huila Honey shows how altitude and processing (honey) affect cup traits, while the Ethiopia Yirgacheffe Washed highlights the clarity expected in high-scoring washed coffees. All three offer insight into how origin, process, and grade shape flavor. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.