Coffee Grind Size Chart: Espresso to Cold Brew

Water dissolves flavour from the surface of each particle. Finer grinds have more surface area and more resistance to flow, so they extract faster and slow the water down. Coarser grinds extract more slowly and let water run through quickly.

That is why each method needs a different size: contact time sets the grind. Espresso is short and pressurised so it needs fine; French press steeps for minutes so it needs coarse. Too fine gives bitter, harsh coffee; too coarse gives weak, sour coffee. Uniformity matters as much as size, since fines and boulders extract at different rates.

The chart above describes grind size; your grinder only shows numbers or clicks. These are the starting settings from our owner's charts for each grinder, counted from the point where the burrs touch. Start here, then adjust by taste and brew time.

Two patterns stand out. Hand grinders with fine steps (K-Ultra, K6) need 3–4 times more clicks between espresso and filter than a Comandante, so count carefully when switching. And grinders built mainly for filter, such as the Virtuoso+ and Timemore C3, only reach espresso fineness for pressurized baskets. If you want true espresso and filter from one grinder, see the espresso grinder picks under $300.

Treat any chart as a starting point. Brew a recipe by weight, then adjust grind by small steps and change one variable at a time. Grind just before brewing, and keep a note of your setting for each method. Single dosing helps with consistency and reduces stale beans.

Burr condition and grinder alignment shift the same number between machines, so calibrate against taste rather than a number. See the dial-in guide for espresso and the burr grinder buying guide.

Grind size also interacts with roast. Light roasts are denser and extract more slowly, so they usually need a finer setting than a dark roast for the same method. Very fresh beans release gas that pushes water away from the grounds, so they can taste sour until they rest a few days or until you grind slightly finer. Stale beans extract quickly and taste flat, and grinding finer rarely rescues them. Our roast levels chart covers how roast changes flavour, and how to pick espresso beans explains freshness.

Fine (200-300 μm) and the least forgiving: at 9 bar, clumps and fines show up in both cup and shot time.

1. 1

   Dose. 18 g and aim for 36 g out (1:2).

2. 2

   Time. The shot from pump start; the target is 25-32 seconds.25-32 seconds

3. 3

   Adjust. Under 20 seconds, grind finer; over 35, coarser.20 seconds

4. 4

   Taste. Sour means finer, bitter means coarser.

Full routine: how to dial in espresso. Chemistry: espresso extraction. The espresso dial-in calculator tells you what to change after each shot.

Medium-fine, not espresso-fine. A moka pot makes roughly 1-2 bar, so an espresso grind clogs the filter plate and over-extracts. Coffee should start flowing after 3-4 minutes on medium heat; a fast, pale gush means the grind is too coarse; heavy sputtering usually means the heat is too high.

Medium-fine, around 400 μm, is a good start. It is the most forgiving method. Use the AeroPress calculator to set coffee and water for the ratio you want.

• Espresso-style: 300-350 μm, 1:5-1:6, 1-minute steep.
• Filter-style: 450-550 μm, 1:12-1:15, 2-3 minute steep.
• Hard plunge? The grind is too fine.

Medium, adjusted by dripper. Drawdown under 90 seconds means grind finer; over 5 minutes, coarser.

• V60 (about 500-650 μm): the cone and single large hole drain fast, so grind at the finer end.
• Kalita Wave (about 550-700 μm): the flat bed and small holes slow the flow, so grind slightly coarser than for a V60.
• Chemex (600-800 μm): thicker paper slows flow, so grind coarser.

Medium, matched to your basket. Flat-bottom baskets (like the Technivorm Moccamaster) tolerate slightly coarser; cone baskets need finer. Weak coffee means grind finer.

Coarse, like breadcrumbs. Mesh does not catch fines, so fine grounds give a muddy, bitter cup, a common reason coffee tastes bitter. Pour it all out right after pressing. For coffee and water amounts, use the French press ratio calculator.

For the full method, ratio and steep time, follow our step-by-step guide on how to use a French press.

Your grinder's coarsest setting for a smooth, low-acid cup. For ratios, use the cold brew ratio calculator.

1. 1

   Start. At the chart position for your method, not mid-dial.

2. 2

   Brew and time it.

3. 3

   Taste. Sour and thin means too coarse; bitter and harsh means too fine.

4. 4

   Change one increment,. Then purge 2-3 g.

5. 5

   Record. Setting, bean and roast date.

A few practical checks help when a chart setting does not match what you see. Rub a pinch of grounds between your fingers: espresso should feel like fine table salt to flour, filter like sand, and French press like coarse sea salt. Then let the brew time confirm it. If a pour-over drains much faster than about three to four minutes for a single cup, go finer; if a French press is muddy and bitter, go coarser. Because every grinder's numbers are different, write down the setting that works for each method and each bag, rather than relying on another grinder's chart.

Some budget grinders max out too fine for French press and cold brew. See how to choose a burr grinder or best coffee grinders.

Electric, fine adjustment steps

Baratza Encore ESP

An entry-level espresso grinder with micro-stepped fine adjustment. Best for: espresso through French press from one grinder. Skip if you only brew filter coffee and want to spend less.

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Hand grinder for filter coffee

Comandante C40

A precision German hand grinder that is strongest at filter coffee; capable but slow for espresso. Best for: pour-over and AeroPress. Skip if you grind espresso daily or brew large batches.

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