If your coffee tastes sour one day and bitter the next, the grinder is a good place to look. Start fine for espresso, around medium for most pour-over and drip brewers, and coarse for French press or cold brew. Then forget the idea that one numbered setting works on every machine. This coffee grind size chart is a starting point; taste and brew time finish the job. If the grinder itself is producing wildly uneven grounds, compare our best coffee grinders.
01
Practical coffee grind size chart
| Brewing method | Starting grind | Visual reference |
|---|---|---|
| Espresso | Fine | Finer than table salt |
| Moka pot | Fine to medium-fine | Fine sand |
| AeroPress | Fine to medium | Recipe-dependent |
| Pour-over | Medium-fine to medium | Table salt |
| Automatic drip | Medium | Regular sand |
| French press | Medium-coarse to coarse | Coarse salt |
| Cold brew | Coarse | Coarse salt |
Treat the chart as a visual neighbourhood, not a GPS coordinate. “12” on one grinder tells you nothing about setting 12 on another, and even two units of the same model may be calibrated slightly differently. Use the maker's range to get close, brew once and move in small steps.
02
Adjust using taste and time
Finer coffee exposes more surface area and usually extracts faster. If the cup runs quickly and tastes sharply sour, thin or unfinished, try a little finer. If it drags on and tastes harsh, dry or heavily bitter, go coarser. One small change is much easier to understand than spinning the dial halfway across the grinder.
Keep dose, water, temperature and pouring technique steady while you adjust. Taste is the result that matters; brew time is a clue, not a universal rule. Pour-over flow also changes with the filter and pouring pattern, espresso reacts to tiny movements and AeroPress recipes can work across a surprisingly broad range.
03
Why grind consistency matters
A burr grinder crushes beans through a controlled gap. A blade grinder repeatedly chops them, creating a mix of dust and large fragments that extract at different speeds. That unevenness is one reason a cup can seem sour and bitter at the same time.
Not every burr grinder suits every method. Filter-focused models may not adjust finely enough for an unpressurised espresso basket; espresso grinders can be slow to move between methods or retain more coffee. Beans change too: roast level, age and humidity can all shift the useful setting.
04
Keep results repeatable
Weighing coffee and water removes a lot of guesswork. Clean the accessible burrs and chute as the manufacturer recommends, and purge a small amount after a large adjustment if the grinder retains grounds. Keep a short note of bean, dose, setting, time and taste; it is more useful than trying to remember last Tuesday's perfect cup.
For the rest of the setup, compare our best electric gooseneck kettles, best electric kettles and travel adapter guide. The wider Coffee category has more brewing guides.
Before blaming grind for everything, check water temperature, ratio and cleanliness. Make one deliberate change, brew again and let flavour choose the next move. That is how the chart becomes your setting rather than somebody else's number.
Sources and further reading
We use primary and specialist sources to check the principles in this article. Product recommendations are researched separately.
