What grind size should you use for each brew method?
Grind coarse like rock salt for French press and cold brew, medium like kosher salt for drip and pour-over, fine like table salt for espresso, and powder-fine for Turkish coffee. The longer water touches the grounds, the coarser the grind should be. Use any chart as a starting point, then adjust by taste.
The coffee grind size chart, from extra fine to extra coarse
Read the chart top to bottom: the finer the grind, the shorter the time water should spend with it. Micron figures are given only where a lab measurement or peer-reviewed study supplies one. Where none exists, the cell says so rather than guessing.
| Grind | Feels like | Approximate particle size | Brew methods | Typical contact time |
|---|---|---|---|---|
| Extra fine | Powder, close to flour | No standard figure published | Turkish coffee (ibrik or cezve) | Heated slowly in the pot until it foams |
| Fine | Table salt | About 200 to 425 microns (lab median 212; one study's most aromatic range 300 to 425) | Espresso | 20 to 30 seconds |
| Medium-fine | Between table salt and kosher salt | No standard figure published | Single-cup pour-over cones when a medium grind runs through too fast | Between the rows above and below |
| Medium | Kosher salt | About 340 microns (lab median for a filter grind) | Flat-bottom drip machines, pour-over | 2 to 4 minutes (pour-over), about 5 minutes (drip machine) |
| Medium-coarse | Between kosher salt and rock salt | 70 to 75% of particles pass an 841 micron sieve (SCA cupping grind) | Cupping, larger batch pour-over | Between the rows above and below |
| Coarse | Rock salt | About 400 to 800 microns | French press | About 4 minutes |
| Extra coarse | Chunkier than rock salt | No standard figure published | Cold brew | About 12 hours (12 to 18 is common) |
The salt comparisons come from the National Coffee Association, which describes espresso as fine like table salt, drip as medium like kosher salt and French press as coarse like rock salt. Contact times for espresso, pour-over, drip, French press and cold brew are the association's figures too. UNESCO, describing Turkish coffee tradition, says the beans are "ground to a fine powder."
The micron figures come from three places: a laser particle analyzer maker's published sample medians (212 microns for an espresso grind, 342 for a filter grind), a 2023 University of Florence study in European Food Research and Technology that called sieved particles of 400 to 799 microns "comparable to the particle size typically used in French Press," and the Specialty Coffee Association's cupping protocol. Treat them as orientation, not targets: every grinder produces a spread of sizes, not one size.
Why does grind size control extraction?
Extraction is water dissolving flavor compounds out of the ground coffee. Two things govern how fast that happens: how much surface the water can reach, and how long it stays in contact.
Surface area
Grinding a bean finer splits it into more pieces, which exposes more surface to the water. The Florence study notes that extraction capacity "is reported to be a function of the total particle surface." A 2016 study in Scientific Reports found that smaller particles extract more rapidly than larger ones because of their greater accessible surface area. That is why espresso, with its fine grind, can finish in under half a minute while cold brew, ground extra coarse, takes hours.
Contact time and flow
The Specialty Coffee Association's brewing guidance says grind size should match the time coffee and water spend together. For drip brewing it pairs a fine grind with 1 to 4 minutes of contact, a drip grind with 4 to 6 minutes and a coarse grind with 6 to 8 minutes. Grind also sets flow: in a pour-over or espresso basket, finer grounds pack tighter and slow the water down, which adds contact time on top of the extra surface area.
Why evenness matters too
Finer is not automatically better. The Florence researchers found that a very fine, perfectly uniform grind extracted fewer of the compounds they measured than a normal grinder's mix of sizes, "despite the greater surface in contact with the solvent." They also note that a grind that is too coarse lets water run through large channels and leaves the cup under-extracted. The practical lesson: pick the size range that suits your brewer, then judge by taste.
Signs your grind is too fine or too coarse
The Specialty Coffee Association describes under-extracted coffee as tasting "sour or grassy" and over-extracted coffee as bitter. Grind is usually the fastest dial to turn when a cup lands on either side.
| What you notice | Likely cause | Try this |
|---|---|---|
| Sour, thin or grassy cup | Too coarse, under-extracted | Go one step finer |
| Water drains through the cone or basket very quickly | Too coarse | Go one step finer |
| Bitter, harsh or drying finish | Too fine, over-extracted | Go one step coarser |
| Pour-over stalls, or the French press plunger fights you | Too fine | Go one step coarser |
| Silty sludge at the bottom of the cup | Too fine for a metal filter | Go coarser, or pour gently and leave the last bit |
Change one variable at a time. If you move the grind and the dose on the same brew, you will not know which one fixed it. For a full taste-by-taste fix list, see the bitter and sour coffee guide in our Coffee Guides.
Use the chart as a starting point, not a setting
Grinder dials are not standardized. A "12" on one model can be close to espresso while a "12" on another is drip territory, and two grinders at the "same" texture can produce different spreads of particle sizes. Burr grinders cut to a more consistent size than blade grinders, which matters given how much evenness affects extraction.
So use the chart to find the right neighborhood, then fine-tune:
- Start at the texture in the chart for your brewer.
- Brew with a measured dose and water amount, and time it.
- Taste. Sour points finer, bitter points coarser.
- Move one or two steps on your dial and note the number that works for each brewer.
Roast level and the coffee itself also shift the ideal setting, so a new bag can need a small adjustment even on a dialed-in grinder.
Which grind should you order from Kaveolah?
Kaveolah sells every coffee whole bean or ground, in 12 oz, 2 lb and 5 lb bags, roasted to order. The ground option is a drip grind: the medium, kosher-salt texture in the chart, made for flat-bottom drip machines and a good starting point for most pour-over cones.
For anything else, choose whole bean and grind right before you brew:
- French press: needs coarse. A drip grind passes through the mesh filter and tends to over-extract over a 4 minute steep.
- Espresso: needs fine, and usually a grinder that adjusts in small steps.
- Cold brew: needs extra coarse for a 12 hour or longer steep.
- Turkish coffee: needs a powder-fine grind that most home burr grinders cannot reach.
Whole bean also gives you room to adjust as you learn a coffee. Single-origin coffees roasted lighter, so the place they were grown comes through, often reward a small grind tweak: a washed coffee from the Ethiopian highlands and a natural-process coffee from Brazil will not always land on the same dial number. Browse all single-origin coffees and pick whole bean unless your brewer is a drip machine. Then the fun part is your time with it, whether that is a press on the porch or a cone in the garage.
Frequently asked questions
What grind size is best for French press?
Use a coarse grind, about the texture of rock salt. Lab work on French press puts typical particles at roughly 400 to 800 microns. Pair it with a steep of about 4 minutes. If the plunger is hard to push or the cup tastes bitter and silty, go coarser.
What grind size should I use for pour-over coffee?
Start with a medium grind, like kosher salt, and aim for 2 to 4 minutes of total brew time. If water rushes through and the cup tastes sour or thin, grind a step finer. If the bed stalls and the cup tastes bitter, grind a step coarser.
Is drip grind the same as medium grind?
Yes, drip grind is a medium grind, about the texture of kosher salt. It suits flat-bottom drip machines with a contact time of about 5 minutes and works as a starting point for many pour-over cones. It is too fine for French press and too coarse for espresso.
Can I use pre-ground drip coffee in a French press?
You can, but expect a stronger, more bitter and silty cup, because medium grounds extract faster and slip through the mesh filter. Pour gently and leave the last bit in the press. For the cleanest press coffee, buy whole bean and grind coarse.
What happens if coffee is ground too fine?
Too fine a grind exposes more surface area and slows water flow, so the coffee over-extracts and tastes bitter or harsh. In a pour-over the bed can stall, and in a French press the plunger becomes hard to push. Move one step coarser and brew again.
How many microns is an espresso grind?
There is no single standard. One laser analysis measured a median of about 212 microns for an espresso grind, and a study found the most volatile aroma compounds in espresso made at 300 to 425 microns. In practice, set the grind by taste and a 20 to 30 second shot.