Q Grader
A Q Grader (Quality Grader) is a certified coffee professional who has passed a rigorous multi-day examination demonstrating their ability to evaluate coffee quality using the SCA cupping protocol and grading standards. The Q Grader credential is administered by the Coffee Quality Institute (CQI) and is often compared to a wine sommelier certification. It is the most widely recognized individual quality credential in the specialty coffee industry, and Q Graders play a critical role at every stage of the supply chain from origin to roastery.
The Q Grader exam consists of approximately 20 tests administered over six days, covering sensory evaluation, cupping proficiency, green coffee grading, roast identification, organic acid identification (distinguishing citric, malic, and phosphoric acids in blind tasting), olfactory skills (Le Nez du Café scent identification), and triangulation tests (identifying the odd sample in sets of three). Candidates must pass every test to earn the credential. The pass rate is approximately 30–40%, reflecting the difficulty and comprehensive nature of the examination.
Q Graders serve several functions in the industry. At origin, they evaluate and score green coffee lots, determining which qualify as specialty grade (80+ points). Importers employ Q Graders to verify quality claims and make purchasing decisions. Roasters use Q Grader skills to develop profiles, maintain quality consistency, and select new offerings. The standardized training ensures that a coffee scored by a Q Grader in Colombia will be evaluated using the same criteria as one scored in Tokyo or Portland.
The credential must be renewed every three years through a recalibration exam to ensure skills remain sharp and consistent with evolving standards. Separate tracks exist for Arabica (Q Arabica Grader) and Robusta (Q Robusta Grader), each with protocols tailored to the species' characteristics. The total number of active Q Graders worldwide is in the thousands, concentrated in producing countries and major consuming markets.