How is coffee quality categorized into grades?
“Grade” is the objective basis of coffee quality: a physical classification of green coffee based on defects and quakers. It doesn't solely determine the taste, but it lays the foundation upon which a high cupping score can even become possible.
What "grade" means for green coffee - and why it's not (only) about taste
Coffee grading evaluates beans based on measurable criteria. Fewer defects mean more consistent roasting, cleaner cup profiles, and better extraction. Taste develops later during roasting and brewing - but without clean green coffee, even the best curve fails.
The SCA grading scale in 5 quality levels (with defects, quakers, and scores)
Overview of the 5 SCA Grades (incl. defect limits, quaker rules, and 80+ points)
- Grade 1: Specialty Coffee: max. 5 full defects, 0 quakers, SCA Cupping Score 80 points or more.
- Grade 2: Premium Coffee: max. 8 full defects, up to 3 quakers.
- Grade 3: Exchange Coffee: 9–23 full defects.
- Grade 4: Standard Coffee: 24–86 full defects.
- Grade 5: Off-Grade: more than 86 full defects.
How grading practically works: Screen Size, Primary/Secondary Defects, Sample Roast
- Calibrated sieves (Screen Size) separate by bean size.
- Visual inspection: Count Primary/Secondary Defects (e.g., black beans, hull fragments, insect damage).
- Quaker Test: Sample roast, identify light “underdeveloped” beans.
- Documentation per 350-g sample bag including defect list and lot information.
Grade vs. Cupping Score: Difference between physical quality and sensory evaluation
Grade measures defects and quakers' importance in coffee; the Cupping Score evaluates aroma, acidity, sweetness, and balance. Specialty Coffee Definition: in practice, both combined - SCA Grade 1 Specialty Coffee plus 80+ points.
What buyers in Germany should check: Transparency, lot information, certificates, and import documents
- Clear lot information: Farm/cooperative, region, varietal, processing, harvest year.
- QC/Grading details: Defect count, quaker result, screen distribution.
- Proofs: CoA/ICO, import documents, certificates if applicable.
- Consistent tasting notes and fresh roast batch.
Common misconceptions: "Premium" is not automatically Specialty, and "100% Arabica" is not a quality grade
"Premium" is a marketing term; Specialty requires strictly defined defect limits. "100% Arabica" says nothing about green coffee quality levels - there are excellent as well as weak Arabicas.
Checklist: How to identify Grade 1 quality in a shop, roastery, or import offer
- Defect count with a maximum of 5 full defects, documented in writing.
- 0 quakers in the sample roast, documented.
- Transparent lot and processing data.
- Cupping protocol with 80+ points.
FAQ
How does the SCA categorize coffee quality into grades?
The SCA divides coffee into 5 quality levels: Grade 1 - Specialty Coffee: Max. 5 full defects, 0 quakers, 80+ points. Grade 2 - Premium Coffee: Max. 8 defects, max. 3 quakers. Grade 3 - Exchange Coffee: 9-23 defects. Grade 4 - Standard Coffee: 24-86 defects. Grade 5 - Off-Grade: More than 86 defects. We exclusively use Grade 1.
What does "quaker" mean in coffee?
Quakers are underdeveloped beans that remain light during roasting and often taste like grain/paper. Quakers are not allowed in Grade 1 because they significantly degrade the cup.
Is a high cupping score the same as Grade 1?
No. Grade primarily refers to physical quality (defects/quakers), while the Cupping Score is the sensory evaluation. Specialty is typically defined by both (including 80+ points plus strict defect limits).
As a buyer in Germany, how do I recognize Grade 1 quality?
Look for transparent lot information (farm/cooperative, processing, harvest year), verifiable import or QC data (defect count/grading), fresh roast, and consistent taste description. Reputable suppliers also clearly state region, varietal, and processing.
Want to go deeper? Compare grading protocols of different lots, cup them in parallel, and compare defects/quakers against your cup profiles - this builds understanding beyond terminology.
