The size of your coffee grounds has a direct effect on how your coffee tastes. According to the National Coffee Association, the general rule is simple: the longer the coffee is in contact with water during brewing, the coarser the grind should be. That is why espresso, which brews in seconds, needs a fine grind, while cold brew, which can steep for hours, calls for a coarse grind. Choosing the right coffee grind size for your brewing method helps you avoid over-extraction (bitter, sour flavors) or under-extraction (flat, watery taste).

Short version: Use a medium grind for drip and pour-over, coarse for French press and cold brew, fine for espresso, and medium-fine for AeroPress and Moka pot. Adjust coarser if your coffee tastes bitter, finer if it tastes weak.

Grind size chart by brewing method

The table below lists recommended grind sizes and typical contact times for popular brewing methods, based on guidance from the National Coffee Association, Bialetti, and AeroPress. Use these as starting points and adjust to your taste.

Brewing Method Recommended Grind Size Approximate Contact Time Source
Drip Coffee Medium About 5 minutes National Coffee Association
Pour-Over Medium 2 to 4 minutes National Coffee Association
French Press Coarse (like rock salt) About 4 minutes National Coffee Association
Espresso Fine 20 to 30 seconds National Coffee Association
Cold Brew Coarse About 12 hours National Coffee Association
Moka Pot Medium-fine (gritty, not powdery) 3 to 6 minutes Bialetti
AeroPress Medium-fine 30 to 60 seconds wait after stirring, then press AeroPress

While grind size is critical, water temperature also matters. The National Coffee Association notes that for pour-over and French press, the Specialty Coffee Association suggests an optimal water temperature of 93 ± 3°C before pouring over the grounds. AeroPress recommends a lower temperature of 185°F (85°C) for its brewing method. Always check your brewer’s instructions for the best results.

Numbered grinder settings: an example

If you use a burr grinder with numbered settings, the manufacturer often provides a chart that maps those numbers to brewing methods. KitchenAid’s burr grinder, for instance, offers 70 unique grind size settings. According to KitchenAid, the finest settings are suitable for espresso and the coarsest for French press. You can use such a chart as a starting point, then fine-tune the setting to match your taste and the specific beans you are using.

Adjusting grind size to taste

The National Coffee Association suggests a simple way to dial in your grind. If your coffee tastes bitter or sour, it may be ground too fine (over-extracted), so try a larger, coarser grind. If it tastes flat or watery, it may be ground too coarse (under-extracted), so try a smaller, finer grind. Make one adjustment at a time and note the change in flavor until you find the balance you enjoy.

Why the grinder matters as much as the setting

A grind size on a chart only helps if your grinder can produce it evenly. The National Coffee Association describes two kinds of grinders. A burr grinder crushes beans between a moving grinding wheel and a non-moving surface, which the NCA says gives a more consistent grind so the flavors extract more evenly. It adds that burr grinders suit methods that need smaller grind sizes, such as espresso, and are less likely to overheat the grounds, which helps keep the coffee’s oils and aromas.

A blade grinder works more like a food processor: a metal blade spins, and how long you run it decides how coarse or fine the result is. The NCA notes that this is not always easy to control and that a blade grinder cannot ensure a consistent grind, although you can learn the right grinding time for your preferred cup with practice. If you use a blade grinder, the coarser settings on the chart above are usually easier to reach than a fine espresso grind. Our guides to burr grinders and blade grinders go into more detail.

Grind fresh and keep beans fresh

The NCA recommends buying whole beans and grinding them right before you brew for the freshest results, and grinding only what you need. Ground coffee loses freshness faster than whole beans: the NCA’s storage guide lists about one to two weeks for ground coffee at room temperature and one to three weeks for roasted whole beans, both in airtight containers. Store beans in an opaque, airtight container in a cool, dark place, away from the oven and sunny spots. Our coffee storage guide covers the details.

Finally, remember that grind is only one of the settings you control. Water temperature, contact time and the amount of coffee you use all interact with grind size, so change one thing at a time and taste the result before changing the next.

Frequently asked questions

What grind size should I use for a Moka pot?

Bialetti, the maker of the classic Moka Express, recommends a medium-fine grind. The company describes it as gritty when rubbed between your fingers, not powdery. This grind allows water to pass through the coffee bed in the 3 to 6 minutes it typically takes for the pot to finish brewing on a low to medium heat.

Can I use the same grind for drip and pour-over?

Both the National Coffee Association’s drip coffee guide and its pour-over guide suggest starting with a medium grind. Because pour-over gives you more manual control over the pour, you may find that a slightly different medium setting works better for your pour-over technique. Begin with the same medium grind and adjust based on taste.

How do I know if my grind is too fine or too coarse?

Use the taste of your brewed coffee as a guide. If the cup is bitter or sour, the grind is likely too fine, causing over-extraction. If the cup is flat or watery, the grind is likely too coarse, causing under-extraction. Adjust the grind size in small steps until the flavor improves.

For more detailed guidance on grind sizes and how they affect different brewers, visit our coffee grind size category page. You can also explore our coffee grinders section and the coffee grinders and grind size guide for deeper dives into equipment and technique.

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