How Coffee Beans Are Graded Around the World

Ever wondered why some bags of coffee boast "SHB" or "Grade 1" while others don’t? Coffee grading isn’t just marketing—it’s a system to signal quality based on where the beans grew, how they were processed, and their physical traits. But with different countries using their own rules, it’s confusing. Here’s how it actually works.

The quick answer: Coffee is graded by altitude (e.g., SHG for high-grown), bean size (e.g., 18/64-inch minimum for Kona Type 1), defect counts (e.g., <10 defects for Kona Extra Fancy), and processing method (washed vs. natural). These factors determine if a coffee qualifies as "specialty" or premium.

Why Altitude Matters in Coffee Grading

In Central American countries like Guatemala, Costa Rica, and El Salvador, coffee farms sit at varying elevations, and altitude directly impacts bean density and flavor. Lower-altitude farms (984–3,280 feet) produce softer, less dense beans with milder acidity—labeled "Pacific" grade. Higher-altitude farms yield harder, denser beans with more complex acidity and aroma. These are often graded as "Strictly High Grown (SHG)" (highest) or "High Grown (HG)" (still premium). In Hawaii, Kona coffee’s grading also considers altitude and bean type.

How Bean Size, Defects, and Processing Define Grades

Beyond altitude, grading systems worldwide use bean size, defect counts, and processing methods. For example, Hawaii’s Kona coffee is split into Type 1 (flat beans) and Type 2 (peaberry). Type 1 grades include Extra Fancy (≥19/64-inch, ≤10 defects), Fancy (≥18/64-inch, ≤16 defects), and Number One (≥16/64-inch, ≤20 defects). Peaberry Prime requires ≥10/64-inch size and ≤25% defects by weight (fermented/black beans ≤5%). Ethiopia, the birthplace of coffee, uses a 1–5 grade system managed by the NCBE, where Grade 1–2 are washed (top-tier) and Grade 3–4 are natural (still good). Defect counts and processing methods are key here too.

Regional Grading Systems You Should Know

Different origins have unique grading rules. Kona (Hawaii) grades flat and peaberry beans by size, defects, and moisture (9–12%). Ethiopia grades washed (Grade 1–2) and natural (Grade 3–4) beans, with Grade 2 washed and Grade 4 natural being excellent. India separates Arabica (washed: Plantation A/B/C, natural: Cherry) and Robusta (washed: Parchment AB/C, natural: Cherry), with Royal-grade Robusta (17/64-inch+) for espresso. Colombia uses Supremo (highest), Excelso (commercial blend), and Extra, with Supremo 18 (18/64-inch) offering notable flavor. The SCAA (U.S.) grades by defect points, with "Specialty" being the top tier.

Yemen’s Unclear Grading System

Yemen currently lacks an official government grading system, though efforts are underway to establish one, with media advocacy pushing for clarity. Until formalized, Yemeni coffee grades remain undefined.

Frequently Asked Questions

What does SHG mean in coffee grading?

SHG stands for "Strictly High Grown," referring to coffee grown at elevations typically above 4,900 feet (1,500 meters). These beans grow slower in cooler climates, resulting in higher density, more complex flavors, and brighter acidity. SHG is a common premium grade in countries like Mexico, Honduras, and Guatemala.

How are Kona coffee beans graded?

Kona coffee is graded into Type 1 (flat beans) and Type 2 (peaberry). Type 1 includes Extra Fancy (≥19/64-inch, ≤10 defects), Fancy (≥18/64-inch, ≤16 defects), and Number One (≥16/64-inch, ≤20 defects). Peaberry Prime requires ≥10/64-inch size, ≤25% defects by weight (fermented/black beans ≤5%), and 9–12% moisture. All these grades qualify as specialty coffee.

What’s the difference between Grade 1 and Grade 2 Ethiopian coffee?

Ethiopian Grade 1 is typically rare and reserved for washed beans, while Grade 2 is the best commonly available washed grade. Grade 3 and 4 are for natural-processed beans, with Grade 4 still considered high-quality. Many exporters downgrade beans by one grade for tax reasons, so Grade 2 washed (e.g., Yirgacheffe) and Grade 4 natural (e.g., Sidamo) are often excellent.

How does India grade its coffee?

India separates Arabica and Robusta, then grades each by process. Arabica washed beans are graded Plantation A (best) to Bulk, while natural beans are Cherry. Robusta washed beans are Parchment AB (best) to Bulk, with natural beans as Cherry. Royal-grade Robusta (17/64-inch+) is premium for espresso. Size is the main grading factor.

What is Supremo coffee in Colombia?

Colombia’s Supremo is the highest grade, followed by Excelso (a commercial blend of Supremo and smaller beans) and Extra (lowest). Supremo 18 (18/64-inch beans) is a standout with good flavor, though most Supremo beans aren’t necessarily flavorful. The grade focuses on bean size, not taste.

Recommended FrontStreet Beans for Grading Insights

Explore FrontStreet Coffee’s Yirgacheffe Grade 1 (washed, floral and citrus notes), Sidamo Natural (berry and winey tones), and Panama Huacai (Geisha heritage, jasmine and stone fruit). These beans reflect the grading systems discussed—Yirgacheffe and Sidamo showcase Ethiopian Grade 1 and 2 qualities, while Huacai highlights premium single-origin traits. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.