Coffee Grind Size Chart: Microns for Every Brew Method

The coffee grind size chart

The table below gives the grind size for every common brew method, in microns, with the midpoint of each range and an everyday comparison so you can judge the size by eye or between your fingers. The ranges are the wide consensus bands from published grind charts — Baratza’s grinder settings, Coffee Roast Co, MyMokaFe, and CoffeeFactz — and they are deliberately wide: published charts disagree by up to about 200 µm at the coarse end, because grinders, beans, and taste all vary. Use the midpoint as your starting point and adjust from there — the right grind is the one that tastes best, not the one that matches a number exactly.

Grind size by brew method — printable reference

Why finer means faster: surface area and extraction

Grind size controls extraction — how fast water pulls flavour compounds out of the coffee. A finer grind has more surface area for the same weight of coffee: grind a bean in half and you expose fresh surfaces; grind it to powder and the water touches far more coffee at once, so extraction runs faster. That is why the grind must match the brew method’s contact time. Espresso pushes water through the grounds in about 30 seconds, so it needs a fine 200–400 µm grind to extract enough in that short time. A V60 pour over takes 2–3 minutes, so a medium 500–800 µm grind is right. A French press steeps for 4 minutes, so it takes a coarse 900–1,300 µm grind — and a coarse grind also keeps the fines from slipping through the mesh and the plunger from clogging. Cold brew steeps for 12–24 hours in cold water, so it needs the coarsest grind of all, 1,200–1,600 µm, or the long steep would over-extract and turn bitter. Grind too fine for the method and the cup is bitter and over-extracted; grind too coarse and it is sour and under-extracted — the grind is the single biggest lever on the taste of the cup.

Dialling in: a grinder step is 50–100 µm

On most burr grinders, one click or step moves the grind by about 50–100 µm — which is why the ranges in the table are hundreds of microns wide and why the midpoint is only a starting point. If your V60 tastes sour, go one step finer — from 650 µm toward 600 µm — and if it tastes bitter, go one step coarser. A single step is a small change, and two or three steps in either direction is usually enough to fix a cup. The same step size is why cheap grinders struggle: a grinder whose steps are 100 µm or more cannot land between the steps, so it cannot hit the exact size your beans want. And the step is also why you should change only one thing at a time — grind size, dose, or water temperature — or you will never know which change fixed the cup.

Every method, checked

Espresso — 200–400 µm, midpoint 300 µm: a fine grind, about the size of fine sand. Water is in contact for about 30 seconds under pressure, so the grind must be fine enough to extract fast — and fine enough to slow the water down, or the shot runs through in 10 seconds and tastes sour.

French press — 900–1,300 µm, midpoint 1,100 µm: a coarse grind, about the size of coarse sea salt. The grounds steep for 4 minutes, and a coarse grind keeps the fines out of the cup and the mesh plunger working — grind it fine and the cup is muddy and the plunger jams.

Cold brew — 1,200–1,600 µm, midpoint 1,400 µm: an extra-coarse grind, about the size of peppercorns. The grounds steep for 12–24 hours in cold water, so the grind must be coarse enough not to over-extract over that long steep — and coarse enough to filter out cleanly at the end.

Turkish — 100–200 µm, midpoint 150 µm: an extra-fine grind, about the size of flour. The finest grind on this chart: the coffee is boiled in water, grounds and all, and drunk unfiltered, so it must be powder-fine — coarser and the cup is gritty.

Reverse lookup — 650 µm: 650 µm falls inside the AeroPress range (400–700 µm), the pour over range (500–800 µm), and the drip machine range (600–900 µm), so it suits an AeroPress, a pour over, and a drip machine. Ranges overlap on purpose — neighbouring methods share grind sizes, and the right method for a given grind is the one whose contact time matches it.

Output · formula · meaning

Who uses this

• The new V60 owner: buys a pour-over dripper and learns the grind is medium — 500–800 µm, midpoint 650 µm, about the size of table salt or sugar — and that a grinder step of 50–100 µm is the unit to adjust in.
• The espresso beginner: pulls a sour 10-second shot and learns the grind should be fine — 200–400 µm, midpoint 300 µm — and that the grind must be fine enough to slow the water down as well as to extract fast.
• The French press drinker: gets a muddy cup with a clogged plunger and learns the grind should be coarse — 900–1,300 µm, midpoint 1,100 µm — because fines slip through the mesh and jam the plunger.
• The cold brew maker: steeps overnight and learns the grind should be extra coarse — 1,200–1,600 µm, midpoint 1,400 µm, about the size of peppercorns — or the 12–24 hour steep over-extracts and turns bitter.

Accuracy & limitations

Grind sizes are ranges, not measurements of your grinder. Published charts disagree by up to about 200 µm at the coarse end — one widely used chart puts French press at 900–1,100 µm where this table gives 900–1,300 µm, and cold brew at 1,100–1,400 µm where this table gives 1,200–1,600 µm — so the ranges here are the broadest published bands, and the midpoint is the starting point, not a verdict. The moka pot is the most disputed row: some published charts put it in the same 200–400 µm band as espresso, while others — and the advice that moka is slightly coarser than espresso — put it at 400–600 µm, which is the band this table uses. A blade grinder cannot hold a size at all: it chops the beans into a mix of powder and chunks, so no chart can fix a blade-ground cup — a burr grinder is the only way to grind to a size. And the right grind also depends on the beans: a dark roast extracts faster than a light roast at the same size, so it usually wants a slightly coarser grind. Taste is the final judge — if the cup is sour, go finer; if it is bitter, go coarser; one grinder step at a time.