tags: [] - coffee/green-beans - coffee/green-beans/grading - coffee/quality aliases: - Coffee grading - Green bean grading - Coffee quality grading

Green Coffee Grading¶

Tags: #coffee/green-beans #coffee/green-beans/grading #coffee/quality Aliases: Coffee grading, Green bean grading, Coffee quality grading Related: Quality Control MOC | Coffee Origin MOC | Sensory Science MOC | Green Coffee Defects Status: ✅ Complete

Overview¶

Green coffee grading is the systematic classification of unroasted coffee beans based on physical characteristics, defect count, and cup quality. It determines market value, establishes quality expectations, and provides a common language for trading coffee globally. Grading systems vary significantly by producing country — "Grade 1" in Ethiopia is defined entirely differently from "Grade 1" in Indonesia — meaning that grade designation alone is never sufficient; cup quality verification is always required.

What Grading Evaluates¶

Grading assesses raw, unroasted coffee according to a combination of standardised criteria:

Physical characteristics: Screen size (bean diameter), density, and colour
Defect count and type: Category 1 and Category 2 defects in a standard 350 g sample
Cup quality: Sensory evaluation using the SCA cupping protocol
Moisture content and water activity: Stability and storability of the lot
Processing quality: Evidence of proper post-harvest handling
Origin-specific standards: The applicable grading system for the producing country

At a Glance¶

Component	What it measures	Key threshold
Screen size	Bean diameter	Screen 17+ = premium in most systems
Density / altitude	Bean hardness and maturation	SHB (1,200 m+) = highest classification
Defect count	Physical defects in 350 g sample	0–5 full defects = specialty in most systems
Cup score	Sensory quality	80+ = specialty grade
Moisture	Water content	10–12% target

Why Grading Matters¶

Grading serves several functions across the coffee supply chain:

Quality communication: Provides a common language for describing and comparing coffee between producers, exporters, importers, and roasters
Price determination: Higher grades command premium prices, reflecting lower defect count and higher usable yield
Trade facilitation: Enables buyers to establish expectations before shipment
Quality control: Sets standards for lot acceptance or rejection
Market segmentation: Distinguishes specialty from commercial and commodity coffee

Grading Components¶

Physical grading covers screen size, density, colour, and defect counting; sensory evaluation uses standardised cupping to assess cup quality. For detail on each method, see Green Coffee Grading Methods. Defects are classified as Category 1 (primary, with serious cup impact) or Category 2 (secondary, less severe) — see Green Coffee Defects for the full defect reference. Regional grade systems vary substantially by origin; see Green Coffee Regional Grades for country-specific standards.

The full grading procedure — sample collection, physical inspection, sample roasting, sensory evaluation, and documentation — is detailed in Green Coffee Grading Process. How grades translate to market value, verification practice, and system limitations is covered in Green Coffee Grading Value and QC.

The Critical Caveat¶

Physical grade is a necessary but not sufficient indicator of quality. Size does not equal quality; defect count does not equal flavour; density does not equal complexity. The 80+ point cup quality threshold is the closest thing to a universal standard and increasingly overrides physical grade as the primary value driver.

Key Facts¶

Green coffee grading classifies unroasted beans by screen size, density, colour, defect count, and cup quality
No universal grading system exists — every major origin uses its own criteria; "Grade 1" is not comparable across countries
Specialty grade requires zero Category 1 defects and a minimum of 80 points on the SCA cup quality scale
The 80+ cup quality threshold is the closest thing to a universal quality standard
Cup quality verification is always required alongside physical grading; defect-free green does not guarantee good flavour

References¶

Changelog¶

Date	Change
2026-05-03	Compliance review: added frontmatter, metadata block, all required sections; removed navigation "Deep Dives" table (converted to prose references); fixed path-prefixed wikilinks; replaced non-coffee tags

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