Finer particles expose more surface and often slow filter-bed flow. Coarser particles generally extract more slowly. Grinder labels are starting points, not standardized measurements.
What to evaluate
Keep the decision connected to the actual coffee, brewer and serving goal.
- Match grind to brewer
- Use taste and drawdown together
- Reduce fines for metal filters
- Record grinder model and setting
A repeatable workflow
Use one baseline, then change only what the evidence supports.
- Choose a baseline
- Brew without changing ratio
- Move finer for fast sharp cups
- Move coarser for harsh stalled cups
Common mistakes
These errors make comparisons unreliable or create avoidable problems.
- Copying another grinder number
- Changing several steps at once
- Judging only by appearance
- Treating blade time as precision
Use the grind planner for a starting note.