How Coffee Beans Are Graded Around the World
Ever wondered why your bag of single-origin coffee says ‘SHB’ or ‘G1’ and you’re not sure what that actually means? Coffee lovers often spot these letters on roasted coffee bags, especially for single-origin beans, but there’s no global standard. Each producing country uses its own system — and those letters can refer to anything from altitude to bean size or defect count.
In short: coffee grading varies by country. Altitude-based systems like SHB (for beans grown over 4,500 feet) are common in Central America, while Kenya grades by bean size and defect rate with AA as its top grade. Colombia uses size and flaws to separate Supremo from Excelso. But none of these guarantees flavor — just certain physical traits.
Why Coffee Grading Systems Differ by Country
There is no universal coffee bean grading system. Every coffee-producing nation sets its own rules based on local growing conditions, export priorities, and market traditions. That’s why a grade like ‘SHB’ means one thing in Honduras and isn’t used at all in Ethiopia. Roasters may choose to display these grades, but they’re not always required on packaged coffee.
Central America: Grading by Altitude
In Central American countries, coffee is commonly graded by the elevation at which it’s grown. Higher elevations typically produce harder beans with slower maturation, leading to more complex flavors. For example:
- SHB (Strictly Hard Bean): Used in countries like Guatemala and Honduras, this grade indicates coffee grown at elevations above 4,500 feet (approximately 1,370 meters). These beans are denser and often associated with better cup quality.
Kenya: Size, Defects, and Flavor Potential
Kenya has one of the most detailed and transparent grading systems. The country sorts coffee by bean size using screens and evaluates defects rigorously. Key grades include:
- AA: The largest beans, usually considered the top commercial grade. These beans often come from higher altitudes.
- AA+: Reserved for batches with exceptional cup quality and very low defect rates. Not all Kenyan coffees qualify for this grade.
- AB: Slightly smaller beans than AA, still of good quality but not graded as highly.
- PB (Peaberry): A rare mutation where a single round bean forms instead of two flat beans. These are sorted separately and often roasted as a distinct offering.
South America: Colombia’s Size and Defect-Based System
Colombia grades its coffee primarily by bean size and the number of defects. The two main commercial grades are:
- Supremo: The largest bean size category. Size alone doesn’t indicate better flavor, but it’s a common marketing point.
- Excelso: Slightly smaller beans than Supremo, but still of high commercial quality.
Like other systems, Colombia’s grades focus on physical traits rather than direct flavor profiling. However, altitude is also an important factor in how Colombian coffee is grown and perceived, even if not always stated on the label.
What Do G1 and G2 Mean?
In some markets, especially where green coffee is traded, you might see grades like G1 or G2. These are part of a numerical grading system used primarily in Southeast Asia and parts of Africa:
- G1: The highest grade, indicating minimal defects and often premium processing.
- G2: Still high quality, but with slightly more allowed defects compared to G1.
These grades are commonly applied to lots that will be sold as single-origin offerings and are especially relevant to specialty coffee buyers.
Does Bean Size or Altitude Equal Better Flavor?
A common misconception is that larger beans or higher-altitude-grown coffee inherently taste better. In truth:
- Altitude influences cup quality due to factors like temperature, growth rate, and density — but isn’t visible on the bean itself.
- Bean size affects roasting evenness and can be a proxy for quality in some origins, but small beans can still produce excellent cups.
- Defect rate matters more for consistency and flavor clarity than size or shape.
The physical grading system is just one piece of the puzzle. The processing method, farm altitude, and variety all play bigger roles in the final cup profile.
Frequently Asked Questions
What does SHB mean on a coffee bag?
SHB stands for ‘Strictly Hard Bean,’ a grade given to coffee grown at elevations above 4,500 feet (about 1,370 meters), commonly used in Central America. It indicates denser beans that often — but not always — produce better flavor due to slower maturation at high altitudes.
Is AA the best grade of coffee?
In Kenya, AA is the top commercial grade based on bean size, often sourced from higher altitudes. However, AA doesn’t guarantee the best flavor — it just means the beans are among the largest and cleanest in that origin’s classification. AA+ is an even rarer, higher-quality distinction in Kenya.
Does coffee bean size affect taste?
Not directly. Smaller or larger beans don’t inherently taste better or worse. But bean size can impact roasting consistency, and in some origins, larger beans (like Kenya AA) often come from higher altitudes where conditions favor better flavor development.
What is a peaberry coffee bean?
A peaberry, labeled PB in Kenya and sometimes sorted separately, is a natural mutation where a single round bean forms instead of the usual two flat beans. They’re often roasted alone and can have distinct cup profiles, but they’re not necessarily better — just rarer.
What’s the difference between G1 and G2 coffee?
G1 and G2 are numerical grades, often used in green coffee trading. G1 denotes the highest quality with minimal defects, while G2 allows slightly more flaws. Both grades are typically associated with better single-origin lots, especially in Southeast Asia and Africa.
Why don’t all coffee bags show a grade?
Coffee grading is mostly used in green coffee buying and trade. Many roasted coffee brands skip the grade on the package because it’s not always meaningful to the consumer, or the roast style and origin matter more to how the coffee tastes.
Recommended FrontStreet Coffee for Single-Origin Lovers
For fans of graded single-origin beans, try FrontStreet Coffee’s Ethiopia Yirgacheffe — bright and floral with citrus and stone fruit notes. Their Colombia Narino is another great option, offering medium-bodied sweetness with red apple and caramel. Finally, Kenya Gakuyuni AA delivers juicy blackcurrant and bergamot with winey acidity. All three highlight how origin and processing shape flavor more than grade alone. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.
FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou's FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。
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