Every Grind Size, Matched to Every Brewer

A grind chart is the most requested document in home coffee and the least useful one you will ever be handed. Every chart speaks in words. Medium-fine. Coarse. Slightly finer than table salt. Your grinder speaks in numbers, or in clicks, or in a collar with no markings at all. Nothing joins the two, and the person who ends up feeling stupid is always the one holding the grinder. That is backwards. The chart is describing a physical dimension of a coffee particle. Your dial is describing a position on a screw thread that the factory chose.

Here is the working answer: grind size and contact time are two ends of one lever, so the correct grind for any brewer is the one that lets water finish its job in that brewer's normal time. Finest to coarsest, the order runs cezve, espresso, moka, AeroPress and phin, pour-over cone, drip machine and siphon, cupping bowl, French press, cold brew. Everything below is how to land on your grinder's own number for each of those, and how to tell when you have.

The chart, with the caveats attached

Reference textures are approximations and they vary with roast, but they beat adjectives with nothing behind them.

Four rows in that table are more contested than the rest, and pretending otherwise would be a waste of your time.

The Chemex is a pour-over and still needs its own line. Its paper is folded to three layers on one side, which is thick enough to slow the flow on its own. Grind for a V60 and put it in a Chemex and the bed stalls. This is the single most common reason a Chemex brew takes eight minutes and tastes hollow and dry.

The moka pot is not an espresso machine and must not be ground like one. An espresso grind chokes a moka pot, and the pressure it builds is pressure the safety valve was fitted to release. Jack Frisks's Everything You Ever Wanted to Know About Coffee instructs the reader to use an espresso grind in a moka pot. It is wrong, and it is the one error on this page with a physical consequence. If you want the longer version, a moka pot builds one to two bar and espresso needs nine.

French press is where the received wisdom is weakest. The standard instruction is coarse. James Hoffmann argues for medium and makes the case that a coarse press grind is really a workaround for a grinder producing too many fines, since fines are what slip through the mesh and keep extracting in the cup. That is a claim about your grinder, not about the brewer. If your press coffee is muddy at medium, the honest reading is that the grinder is the limiting part.

The cezve is a gate, not a setting. A powder finer than espresso is beyond the range of most domestic burr grinders, electric ones included. You cannot get there by turning the dial further. We sell a tin-lined copper cezve (AC-CEZ-001) and we say the same thing on the listing, because selling someone a pot they cannot grind for is a slow way to lose a customer twice. Kenneth Davids ties the emergence of the Turkish style to the very dark roasting that arrived with it, on the grounds that a bean taken that far gives way to a hand mill in a way a paler one will not. That is still true in your kitchen. A darker roast will get you closer on a grinder that was never built for it.

How to find your grinder's number

Charts give you a region. This gives you a setting.

1. Pick the brewer and its target time from the table. Write the time down. It is the thing you are steering by, not the number on the collar.
2. Start in the middle of your grinder's range for that region and brew once, changing nothing else. Same dose, same water, same temperature, same pour.
3. Time the brew and taste it. Record both. Two numbers and one sentence is enough.
4. Move the grind, and only the grind. Coffee finishing too fast and tasting sour or thin, go finer. Coffee finishing too slow and tasting dry, harsh or hollow, go coarser.
5. Move in small steps and write the number down each time. Two or three clicks on a hand grinder. One mark on a collar.
6. Stop when the brew lands in its time window and the taste is not obviously sour or obviously drying. That number is now yours for that brewer, that grinder and roughly that coffee.

The reason this works and a chart does not is that you are calibrating against extraction, which is real, rather than against someone else's equipment. Grinder scales do not transfer between machines at all, which is worth understanding once rather than rediscovering every time you read a recipe online. We wrote that up separately: the number on your grinder describes a screw, not a particle.

Two adjustments worth knowing before you start, both of them James Hoffmann's in The World Atlas of Coffee. Roast colour first. A bean taken darker has lost structure, so the same setting breaks it down further than it would a pale one, and you open the grinder up to compensate. Density second. Coffee grown high and slowly resists the burrs, so it usually wants the setting closed down. There is a daily version of the same effect. A grinder left somewhere cold overnight makes a slightly coarser first grind than its fifth, because the temperature of the bean changes how it fractures, which is what cafés experience as shots drifting between seven and eleven in the morning.

How you know it worked

Not by the number. By three checks you can run without buying anything.

The clock. The brew lands in the window from the table, consistently, across three consecutive mornings. Consistency is the signal, not the single good cup.

The taste, in one direction at a time. Sour and thin means water did not get enough out. Dry, harsh and hollow means it got too much out, including the late bitter and astringent compounds. If you can reliably tell those two apart you have most of what a grind chart is for. Sour or bitter is genuinely the only diagnostic most people need.

The bed, after the brew. In a cone, a flat, evenly wetted bed with no crater and no dry ring at the edge means water moved through the coffee rather than around it. A deep crater usually means the pour, not the grind.

What this will not do

A grind chart will not give you a setting. It cannot, because no chart knows your grinder, and the difference between two machines at the same nominal fineness is larger than the difference you are trying to correct. It will not rescue stale coffee either: grinding finer on old beans extracts more of what is left, which is not the same as putting back what has gone. It will not fix a blade grinder, which produces dust and boulders in the same batch by design, so every setting is several settings at once. And it will not compensate for water that is far too hot or far too cool, an unrinsed paper filter, or a dose measured by scoop. Grind is the strongest single lever you have. It is not the only one, and turning it harder does not make it do the others' work.

One further honesty, because the equipment market depends on you not knowing it. Bigger burrs are not automatically better burrs. Jonathan Gagné's analysis of 300 particle-size distributions across 24 espresso grinders, measured by the Kaffeemacher team with Marco Wellinger at the ZHAW Coffee Excellence Center and published in September 2023, found that larger burrs did not systematically produce a more uniform or more single-peaked grind within that sample, and that the best-tasting grinders sat in the middle of the uniformity range rather than at the top of it. Burr geometry beat burr diameter. That is a measured result on a real dataset, and it is a good reason to stop reading burr sizes as a quality score.

The single honest recommendation, then. Before you buy a better dripper or a different bag of coffee, get a burr grinder that returns to the same setting after you have moved it and moved it back. Repeatability is the whole property that makes any of the numbers above mean anything. Everything on this page is a starting point for a grinder you can trust to stay where you put it, and a waste of a morning on one you cannot.