Grind Size¶
Grind Size The coarseness or fineness of coffee particles after grinding. The most crucial variable for controlling extraction rate. Ranges from extra-fine (Turkish) to extra-coarse (cold brew). Extra-Fine (Turkish) Powder-like consistency, finest grind setting. Used for Turkish coffee (ibrik/cezve). Particles <300 microns. Creates full suspension in water. Fine (Espresso) Sand-like consistency. Standard for espresso brewing. Particles 200-400 microns. Allows 9-bar pressure to extract in 25-30 seconds. Fine-Medium Slightly coarser than espresso. Used for Moka pot, AeroPress (shorter brew times). Particles 300-500 microns. Faster flow than espresso grind. Medium (Drip) Table salt consistency. Standard for drip coffee makers, pour-over cones (V60, Kalita), AeroPress. Particles 500-800 microns. Balanced extraction for 3-4 minute brews. Medium-Coarse Between medium and coarse. Used for Chemex, some pour-over methods, Clever Dripper. Particles 700-1000 microns. Slightly faster flow than medium. Coarse Sea salt consistency. Standard for French press, percolator, cupping. Particles 800-1200 microns. Slower extraction suitable for immersion methods. Extra-Coarse Peppercorn-like chunks. Used for cold brew, cowboy coffee. Particles >1200 microns. Very slow extraction for long steep times (12-24 hours). Particle Distribution The range of particle sizes produced by grinding. Includes fines (very small), boulders (very large), and desired size range. Uniform distribution improves extraction consistency. Fines Very small coffee particles (often <100 microns) produced during grinding. Can cause over-extraction, bitterness, and clogging. All grinders produce some fines; quality grinders minimize them. Boulders Very large coffee particles that are under-extracted compared to the target grind size. Contribute to weak, sour notes. Indicate inconsistent grinding. Consistency The uniformity of particle sizes in ground coffee. High-quality burr grinders produce consistent grinds with narrow particle distribution. Critical for even extraction. Grind Adjustment Changing the grind size finer or coarser to control extraction. Finer slows extraction and increases strength; coarser speeds extraction and decreases strength. Grind Finer Reducing particle size. Used when espresso pulls too fast, pour-over drips too quickly, or coffee tastes weak and sour (under-extracted). Increases surface area and extraction. Grind Coarser Increasing particle size. Used when espresso pulls too slowly, pour-over clogs, or coffee tastes bitter and harsh (over-extracted). Decreases surface area and extraction. Stepped Grinder A grinder with fixed grind settings or "steps" between sizes. Easier to remember settings but less precise adjustment. Common in home grinders. Stepless Grinder A grinder with infinite adjustment across the grind range. Allows precise dialing in but harder to reproduce settings. Common in high-end commercial and prosumer grinders. Grind Retention Coffee grounds that remain inside the grinder after grinding. Can be stale, affect dosing accuracy, and contaminate fresh grinds. Low retention preferred for single-dosing. Single Dose Grinding Grinding only the amount needed for one brew, with minimal retention. Ensures maximum freshness and allows easy coffee switching. Growing trend in home espresso.
Related Notes: - Coffee Terminology MoC