Grind size is one of the most powerful controls you have over coffee flavor. It changes how quickly water can extract flavor from the coffee, which means a small grinder adjustment can fix a cup that otherwise seems completely wrong.
The Simple Rule
Finer grinding generally increases extraction. Coarser grinding generally decreases extraction.
If coffee tastes sour, thin or underdeveloped, try grinding finer. If it tastes harsh, dry or overly bitter, try grinding coarser. Make small adjustments and keep everything else as consistent as possible.
Espresso Grind Size
Espresso requires a fine grind because water passes through a compact bed of coffee very quickly under pressure. Small changes matter a lot.
If a shot runs far too quickly, grind finer. If it barely drips or takes much too long, grind coarser. Always make changes gradually and purge a small amount of coffee after adjusting a grinder so the next dose reflects the new setting.
Browse our espresso coffee beans or read how to dial in espresso.
Pour-Over Grind Size
Most pour-over brewing starts around a medium-fine grind—finer than typical automatic drip but much coarser than espresso. The exact setting depends on the brewer, dose, filter and pouring technique.
If the brew drains too quickly and tastes sour or empty, go finer. If it stalls and tastes dry or bitter, go coarser.
Automatic Drip Grind Size
A medium grind is a useful starting point for most batch and home drip brewers. Larger batches may need a slightly coarser grind because water remains in contact with the coffee longer.
French Press Grind Size
French press usually benefits from a medium-coarse to coarse grind. The long immersion time gives water plenty of opportunity to extract flavor, so grinding too fine can create excessive bitterness or a muddy texture.
AeroPress Grind Size
AeroPress is flexible. Shorter recipes often use a finer grind; longer immersion recipes can use a coarser one. Instead of searching for one correct AeroPress grind setting, choose a recipe and then use taste to adjust.
Why Grinder Numbers Are Not Universal
A “10” on one grinder does not equal a “10” on another. Burr geometry, calibration, burr wear and manufacturing tolerances all change the actual particle size. Use recipe descriptions such as fine, medium or coarse only as starting points.
Fresh Grinding Matters
Grinding dramatically increases coffee’s exposed surface area. Aroma begins escaping quickly, which is why whole bean coffee ground immediately before brewing usually tastes more vivid than coffee ground much earlier.
That said, convenience matters too. We offer ground options on many Common Friends coffees because good coffee brewed consistently is better than an ideal routine you will not actually follow.
How to Adjust Grind by Taste
- Sour, sharp, thin: try finer.
- Sweet but weak: consider a slightly stronger coffee-to-water ratio.
- Bitter, dry, astringent: try coarser.
- Tastes good: stop adjusting it.
Use grind size together with a repeatable coffee-to-water ratio, and brewing becomes much easier to troubleshoot.
Browse our brewing devices or shop all fresh roasted coffee.