This is a quick-reference chart: which grind to start with for each brewing method, what that grind looks like, and how to tell from the brew whether to go finer or coarser. If you want the explanation of why grind size changes flavor, read why coffee grind size matters first.
Grind Size Chart by Brewing Method
| Method | Starting grind | Looks like | Sign you need to adjust |
|---|---|---|---|
| Turkish coffee | Extra fine | Powdered sugar or flour | Grounds feel gritty rather than silty in the cup: go finer |
| Espresso | Fine | Fine sand to powder | Shot runs much faster or slower than the recipe’s time |
| Moka pot | Fine to medium-fine | Fine sand | Coffee barely comes up, or sputters out pale and fast |
| AeroPress | Medium-fine to fine | Fine sand | Plunger is very hard to press: go coarser |
| V60 and cone pour-over | Medium-fine | Between table salt and fine sand | Drawdown finishes well before or after the recipe’s time |
| Flat-bottom drip | Medium | Table salt | Basket overflows (too fine) or coffee is weak and fast (too coarse) |
| Chemex | Medium-coarse | Coarse sand | Thick filter stalls: go coarser |
| French press | Coarse | Coarse sea salt | Plunger is hard to push, or the cup is muddy: go coarser |
| Cowboy coffee | Coarse | Coarse sea salt | Too much sediment pours out with the coffee |
| Cold brew | Coarse to extra coarse | Coarse sea salt or cracked pepper | Concentrate is hard to filter or tastes muddy |
Grind names are not standardized between manufacturers, so “medium” on one grinder may be noticeably finer than “medium” on another. Use the visual description and the brew itself, not the label on the dial, to judge where you are.
What Grind Sizes Look Like in Microns
Coffee particles are measured in microns (µm; 1,000 microns = 1 mm). Few people measure at home, but the numbers show how big the gaps between methods are. Grinder maker Mahlkönig gives these typical average particle sizes:
| Method | Typical average particle size |
|---|---|
| Espresso | 200–400 µm |
| Pour-over | 500–800 µm |
| Cold brew | 700–900 µm |
| French press | 800–1,000 µm |
Two points make these figures more useful than they first appear:
- Every grind is a spread, not a single size. Mahlkönig’s own example is an espresso grind averaging 300 µm whose particles range from roughly 150 to 450 µm. According to Mahlkönig, the smallest particles (fines) extract first and can add harsh, bitter notes.
- The grinder shapes the spread. Mahlkönig describes flat burrs as producing most particles around one size, and conical burrs as producing two distinct size groups. Two grinders with the same average can therefore taste different, which is one reason settings never transfer exactly between grinders.
A peer-reviewed study in Scientific Reports (Uman et al., 2016) adds a less obvious factor: grinding colder beans produced a narrower particle distribution and a smaller average size. The same study found that the particle distribution did not depend on the beans’ origin or processing method.
Notes for Specific Methods
- Espresso is the least forgiving. Because water is forced through at high pressure, small grind changes noticeably change how fast the shot runs. Adjust by flow time and taste, not by how the grounds look. See espresso at home.
- Turkish coffee is the only common method where the grounds are meant to stay in the cup, so the grind needs to be finer than espresso, closer to a powder. See the Turkish coffee guide.
- Moka pot grinds sit between pour-over and espresso. Going as fine as espresso can make it hard for water to push through. More in the moka pot guide.
- AeroPress recipes range from short, fine-ground brews to long, coarser steeps, so follow the grind your recipe gives. Ours is in the AeroPress recipe.
- Cone pour-over (V60) is where grind is easiest to read, because you can watch how fast the water drains. See the V60 guide.
- Chemex uses a thick paper filter and drains relatively slowly, which is why it usually starts a step coarser than a V60. See the Chemex guide.
- Drip machines vary with basket shape and flow rate; start at medium and use the drip coffee guide for other fixes.
- French press, cowboy coffee, and cold brew are immersion methods with long contact times. Fine grounds pass through a metal mesh or stay suspended, so start coarse. See the French press, cowboy coffee, and cold brew guides.
Finer or Coarser? Reading the Brew
| What you notice | Likely grind problem | Try |
|---|---|---|
| Sour, thin, or sharp taste | Too coarse (under-extracted) | One step finer |
| Bitter, harsh, or drying taste | Too fine (over-extracted) | One step coarser |
| Brew finishes much faster than the recipe | Too coarse | Finer |
| Brew finishes much slower, or the filter clogs | Too fine, or too many fines | Coarser |
| Sour and bitter at the same time | Possibly an uneven grind (fines plus large pieces) | Check the grinder before changing the setting |
Move one step at a time and keep the dose, water, and temperature the same between brews. Grind is not the only cause of these tastes; our bitter vs. sour coffee guide covers the others.
Keep a Settings Log for Your Grinder
Because settings do not transfer between grinders, the most useful chart is one you write for your own. Once you find a setting you like, note it down with the recipe, for example:
| Method | Setting | Recipe, time, taste |
|---|---|---|
| V60 | (yours) | 15 g / 250 g, (time), (notes) |
| French press | (yours) | (dose), (time), (notes) |
Expect to fine-tune when you open a new bag, since different coffees can need slightly different settings. If you are still choosing equipment, see how to choose a coffee grinder; if you use a blade grinder, burr vs. blade grinders explains why its settings are harder to repeat.
Sources
- Mahlkönig (grinder manufacturer). Blog article on microns and grind consistency. Source for the typical micron ranges by method, the 150–450 µm espresso spread example, and the flat versus conical burr distributions.
- Uman, E., et al. (2016). The effect of bean origin and temperature on grinding roasted coffee. Scientific Reports 6, 24483. Source for the effect of bean temperature and origin on particle distribution.
