Are You Using The Correct Coffee Grind Size?

The size of your coffee grounds has a lot to do with how your morning cup of coffee tastes. There are many more options than the medium coffee grind size you’d find in most pre-ground coffee in stores, each of which will produce a different flavor profile, and can be tailored to the type of coffee you want to make.

Types and Uses of Coffee Grind Sizes

Coffee is often ground into three general sizes: coarse, medium, and fine. Different grind sizes are best suited for different coffee styles.  

Coarse Coffee Grounds

In this grind style, the coffee beans aren't fully ground, leaving some larger chunks of beans within the finer grind. A coarse grind is often used in French press and cold water brews. The larger chunks keep smaller particles from passing through the mesh of a French press. It also makes an ideal grind for a cold brew because the larger pieces have time to brew without developing a bitter taste.

Coarse grounds can be divided into extra and medium-coarse varieties, each of which serves a particular purpose. For cold brew coffee, extra coarse grounds allow you to soak your grounds overnight without worrying that the beans will develop a bitter flavor from being soaked too long. If you're using a French press or Chemex device, a medium-coarse grind size is ideal, since the larger pieces will help to keep the smaller coarse particles from passing through the mesh and getting through to your cup.

Extra coarse grind, similar to ground peppercorns.

Use Case: Cold brew

 

 

Coarse grind, similar to sea salt.

Use case: Clara French Press, Duo Coffee Steeper, percolators

 

Medium Coffee Grounds

Drip brewers and Chemex fall more towards medium coarseness, while pour-over cones and siphons are a medium fine grind. The consistency of medium grind is similar to sand. This picture falls more within the medium fine category.

Medium-fine grounds can be used in a drip coffee maker or a siphon device, although if they are too fine, they can clog the filter and/or over extract, producing a too heavily-bodied and usually bitter or chalky cup of coffee. Medium-fine grinds are more often used for pour-over coffee, particularly if the filter is shaped like a cone. A good medium-fine grind will produce a cup of coffee that is smooth and tasty, without worry about extra grinds passing through.

Use case: Electric coffee makers, drip brewers, Chemex, pour-over cones, siphon brewers

 

Fine Coffee Grounds

Fitting within the definition of a fine grind are fine and extra-fine grounds. With a fine grind, the texture of the coffee is similar to table salt or flour. This makes it ideal for making espresso or other quick-brewed coffee. The fine grains make it easy for water to pass through quickly while soaking up the flavor of the coffee. 

Extra-fine coffee grinds are typically used only in particular styles of coffee, one of which is Turkish coffee. With a texture similar to that of powdered sugar, extra-fine coffee grinds often pass through the filter along with the water, giving Turkish coffee a more unique texture and taste than other styles. 

Fine to extra fine. Think slightly finer than granulated sugar. It should be difficult to see individual grounds.

Use case: Espresso and some pour-over methods such as Hario V60

 

 

 

As fine of a grind as possible – it should feel and look like flour. You should barely be able to distinguish individual grounds.

Use case: Turkish (Ibrik)

 

Keep in mind, for the finer espresso and especially the Turkish grind, you’ll need a grinder that can handle espresso, such as our Opus Conical Burr Grinder. 

Coffee Grind Size Table 

Grind Type	Appearance	Best Coffee Use	Distinguishing Features
Extra Coarse	Ground peppercorn	Cold brew, Cowboy coffee, Vietnamese	long immersion times
Coarse/Medium-coarse	Sea Salt	French Press, percolator, Chemex drippers, siphon brewers	great for specialty coffees
Medium	Sand	Pour over, drip coffee	versatile, most commonly used in coffee shops
Fine	Powdered sugar	Espresso, Aeropress, Moka pot	very short steep times
Extra Fine	Flour	Turkish coffee	usually used without a filter

The Science Behind Coffee Grind Size

Wondering why different brew methods require different grind sizes? We break down the science behind it here: 

Surface Area 

A larger surface area allows for longer contact with the water filtering through and greater extraction. A finer grind size produces a larger total surface area, producing more extraction and a deeper flavor.  

Brew Time

As is true in other areas of life, time is a factor when determining the kind of grind size you want to use. In general, longer brew times require a coarser coffee grind.

• Short brews: espresso and some other drip types require the least amount of brewing time
• Long brews: cold brew and French press coffee styles require that the coffee brew longer in order to pull as much flavor from the grinds as possible

Rate of Flow

This is the measure of how quickly water passes through the coffee during the brewing process. The flow rate is faster when going through finer coffee grounds, which means that it doesn't have as much time to absorb the full flavor of the coffee beans.

Rate of Extraction

This is another important component that can determine the end body of your coffee. It's the measure of how fast flavor is extracted from the grounds.

• Cold brew - requires overnight steeping to reach an ideal rate of extraction, which is why the grains need to be coarse
• Espresso/Turkish coffee - water has little time to extract the flavor in these coffee styles, which requires a finer coffee grind

Extract Your Best Cup of Coffee

To understand just what makes a good cup of coffee, you'll need to understand the exact process of extraction.

When you're brewing a cup of coffee, the water that filters through coffee grounds extracts the fats and acids of the bean first, then the sugars and plant fibers. This means that your coffee will be infused first with acidic flavor, then sweet and bitter. It can be difficult to find the right balance between the three, which is where the grind size can either assist or counteract the process. 

Under-extracted coffee: Because extraction follows the same progression, using grounds that are too large allows the water to pass through the filter too quickly, so only the first part of the extraction process has time to finish—only the fats and acids get through before all the water has been filtered through. This results in a cup of coffee that is sour and acidic tasting.

Over-extracted coffee: At the other end of the spectrum, an over-extracted cup of coffee happens when you use grounds that are too fine for the type of coffee you want. If it takes too long to filter through, your coffee will taste bitter and may make your mouth dry.

Using the Right Accessory For Your Coffee Drinking Experience

We always recommend grinding your own coffee beans for the best coffee drinking experience, and you'll need to have the right kind of grinder. 

Blade grinders: These are found almost everywhere, but they are not the best grinders if you want to produce a consistent coffee grind. The metal blades often cut the beans unevenly, so some will be coarse while others are of a finer texture. The friction and heat created as the blade grinder runs can also impact the coffee beans, making them taste bitter or smoky. 

Burr grinders: Rather than using blades to grind coffee beans, a burr grinder uses pressure to slowly grind the beans down to the size you need. Because the pressure is applied slowly and consistently throughout, the ground coffee is also consistent which is key to a delicious cup. 

There are two types of burr grinder:

Conical burr grinders: In a conical burr grinder, the two rings of burrs are inside one another, and gravity pushes the beans through them. These tend to be more affordable burr grinders, and if you’ve only ever used a blade grinder, they are a significant upgrade to your coffee: you’ll taste the difference immediately. If you’re looking to enter the world of fine grinding, we’ve designed a delightfully intuitive and high quality conical burr grinder called Opus Conical Burr Grinder. 

Flat burr grinders: In a flat burr grinder, there are two layers of burrs through which the beans are pushed. The burrs are more perfectly parallel than in a conical grinder and the beans spend more time in contact with the burrs, leading to a more consistent and uniform grind. Generally, a flat burr grinder produces the highest quality grind and more even extraction. The first grinder we designed was a flat burr grinder, our award-winning Ode Brew Grinder, which has since gotten an upgrade in our Ode Brew Grinder Gen 2, with brew burrs designed in-house to produce an unparalleled clarity of flavor.

Always Grind As You Go

To maximize the flavor of your coffee beans, only grind what you plan to drink each morning. It may be more convenient to pre-grind your coffee, especially during a busy work week, but once you grind the beans, you expose your grounds to the air, leading to oxidation, the deterioration of the coffee grounds and a stale flavor. This is why we designed our coffee grinders with unique single-dose loading for maximum freshness.

Ready to start your grind adventure? Shop Grinders