grind for chemex

How to Grind for Chemex to Make the Best Coffee

While the pour-over coffee brewing method continues to gain popularity, many people wonder how to grind for Chemex to make the best coffee.

See having the right coffee grind for Chemex allows you to brew great coffee with high control throughout the brewing process.

Chemex is one of the best easy ways to brew coffee without having to purchase expensive equipment.

It has won awards in both design and functional science communities and obtained a permanent location in some prominent museums in the world.

Chemex Pour-Over Glass Coffeemaker - Classic Series - 10-Cup - Exclusive Packaging
2,807 Reviews
Chemex Pour-Over Glass Coffeemaker – Classic Series – 10-Cup – Exclusive Packaging
  • CHEMEX – simple, easy to use with timeless, elegant design
Chemex Pour-Over Glass Coffeemaker – Classic Series – 3-Cup – Exclusive Packaging
  • CHEMEX – simple, easy to use with timeless, elegant design

What grind size should you use for a Chemex?

  • Chemex grind size –
    • Not too fine, not too coarse, but in between – a medium-coarse grind
    • Size of the grounds should be similar to coarse sand
    • This allows the water to flow through steadily, extracting flavor from the beans
    • Too fine a grind can lead to overextraction and bitter flavor
    • Too coarse and the water flows too fast, not extracting enough flavor
  • Chemex coffee grind size
    • Grind size matters a lot for how the Chemex coffee tastes
    • You want an even, medium-coarse grind
    • The ground coffee should look like kosher salt or sugar grains
    • This allows the water to wet the grounds evenly and pull out the best flavor
    • With the right grind, the coffee will have nice flavor without bitterness
    • A fine grind can overextract and make it taste bitter
    • The medium-coarse grind is just right for great Chemex coffee

Key Takeaways

  • Chemex needs a medium-coarse grind, not too fine or coarse
  • Grounds should be evenly sized, similar to coarse sand/salt
  • This allows proper water flow and extraction of best flavor
  • Follow this grind size for optimal Chemex coffee

What is a Chemex?

A Chemex is a coffee maker that brews coffee through the manual pour-over style. It features a glass flask that is usually shaped like an hourglass.


The glass flask’s handle is enclosed with a wood or a leather tie. Peter Schlumbohm invented the Chemex Coffee maker in 1941.

Being a quality coffee maker, Chemex is actually what most coffee makers try to be. It has never needed improvements since invention.

This coffee maker features all the things you need to make great coffee for your family.

Like most coffee makers, Chemex uses gravity to pull hot water through a bed of ground coffee beans that are placed on Chemex filters.

Chemex Pour-Over Glass Coffeemaker – Classic Series – 8-Cup – Exclusive Packaging
  • CHEMEX – simple, easy to use with timeless, elegant design

The unique thing about the Chemex physical appearance is the heatproof wooden collar on the neck for easy handling.

Chemex Coffee Maker is available on various online stores like Amazon, in different sizes and with two handle options.

While Chemex looks like most coffee makers, its thick filters make it unique and a better option for brewing coffee at home.

Chemex Filters

The Chemex filters are thicker than those filters used in most pour-over coffee makers. This results in slow brewing to achieve a richer and strongly flavored coffee.

grind size chemex

Heavy filters also filter all the unwanted fats and oils to ensure that your coffee has the best natural taste.

Another fantastic thing about thick Chemex filters is that they can remove more cafestol, a compound that elevates cholesterol level in coffee.

If you want to make clean, pure, and flavorful coffee with no bitterness or sediment, Chemex filters will help you achieve that with ease.

How to Grind Coffee for Chemex Brewing?

As with other coffee makers, the type of grind matters a lot when brewing coffee with a Chemex. Thus, it’s essential to learn how to grind coffee for Chemex brewing.

Keep in mind that the Chemex coffee grind type is different from that of a French Press that uses a coarse grind.

The best thing to do is to grind your coffee with a burr grinder as it will help you achieve a medium-coarse grind (less chunky coffee grind).  It allows you to select the desired grind size.

This grind size will allow the right flow rate and for the best extraction of various coffee components.

Chemex Bundle – 10-Cup Classic Series – 100 ct Square Filters – Exclusive Packaging
  • CHEMEX – simple, easy to use with timeless, elegant design

You can follow the following steps to grind coffee for Chemex to make the best coffee:

Step 1

Set your burr grinder to grind coffee to a medium grind, which is usually 5 to 10. The good thing about a burr grinder is that you can set it to any ground level.

Step 2

Measure your freshly roasted coffee beans and be sure to use the right ratio. If you want to brew three cups of coffee, 55 grams of coffee will be okay.

Step 3

Start the grinder according to the manufacturer’s instructions to grind your coffee. Let the grinder slice the coffee beans until they reach the proper (set) grind.

The secret to great Chemex coffee is having a reliable and quality burr grinder. If you want to buy one, ensure that you get the best one.

You can buy a manual burr grinder or electric burr grinder, depending on your budget.

Read More:

How To Grind Coffee Beans And Keep Up Coffees Freshness

Why Burr Coffee Grinder is the Best for Chemex Coffee?

A burr grinder is a type of coffee grinder that uses metal surfaces known as burrs. These burrs revolve against coffee beans to grind them into almost equal size pieces.

Burr grinders are designed in a way that you can adjust the burrs, depending on the grind-size you want to achieve.

This is because some brewing methods require coarse grind, while others require a very fine grind.


Having a quality burr grinder will provide you with uniformly sliced coffee beans, which will result in a very smooth coffee drink.

Most blade grinders lack this quality as they deliver coffee pieces that are smashed unequally.

What Grind Size is the Best for Chemex Brewing?

The right grind size for Chemex may vary from one person to the other, depending on their needs.

Chemex Natural Coffee Filters, Square, 100ct – Exclusive Packaging
  • Step 1: Fold the CHEMEX filter in half. Then fold in half again, bringing the two corners together. Place your finger…

While the filter does most of the work when brewing coffee with a Chemex, it’s vital to have the suitable grind size for Chemex to steer clear of over-extraction or under extraction.

Brewing coffee with very fine grind will lead to over-extraction, while using a too coarse grind will lead to under-extraction.

Over-extracted coffee won’t be ideal, as it might be bitter. Under-extracted coffee will taste a bit sour and sharp as water hasn’t had to absorb and break down enough sugars to neutralize the acids.

How does the Grind Size Relate to Coffee Extraction?

When it comes to coffee extraction, the grind size determines how the extraction will be through the brewing process.

Using the wrong grind size usually changes how the flavor compounds dissolve in the water. For instance:

Too fine grind size increases the amount of time that the hot water sits on the beans, leading to the extraction of the unneeded components that make your coffee bitter.

But if bitterness is not a bad thing for you, you can use very fine grind size to brew your coffee with Chemex.

Coarsely ground beans don’t allow water to have enough time to extract essential compounds that balance the acidity. So, you end up with a sour and less flavorful cup of coffee.

Best Coffee Grinder for Chemex

  1. Baratza Encore Grinder – This burr grinder is very versatile and widely considered one of the best for manual brewing methods like Chemex. It has settings for everything from French press to espresso and produces consistent grinds.

2. Rancilio Rocky Grinder – A commercial-grade conical burr grinder known for grind consistency. It offers a wide range of grind sizes and the grounds it produces are perfect for pour over brewers like the Chemex.

3. OXO Brew Conical Burr Grinder – An affordable, but still high quality conical burr grinder. Has 15 settings from fine to coarse, making dialing in Chemex grinds easy. Features a timer and handy grounds bin.

4. Baratza Virtuoso+ – An upgraded version of Baratza’s popular Virtuoso grinder. With 40 grind settings, it can grind precisely for any manual brewing method. Durable conical burrs provide accurate grinds.

5. Handground Precision Grinder – For a manual option, this consistent hand grinder has 15 click settings for a wide range of grinds. Ceramic conical burrs keep grounds uniform in size. Portable for travel too.

The most important thing is a consistent, medium-coarse grind. Conical burr grinders tend to work very well to achieve the optimal size grounds for smooth Chemex extraction. Look for grinders with grind size flexibility and precision.

How to Brew Coffee Using Chemex?

Brewing coffee with a Chemex is one of the easiest ways to make coffee at home. The key thing is to ensure that you have the right Chemex coffee grind.

Whether you like light roast, medium, or dark roast, Chemex allows you to brew your favorite coffee.

To brew coffee with a Chemex Coffee Maker, you will need various things:

  • Chemex brewer
  • Chemex filters
  • Roasted coffee beans
  • A coffee grinder (burr grinder-recommended)
  • A gooseneck kettle
  • A cup

I highly recommend that you use a burr grinder if possible, as it provides the perfect grind needed for making coffee with a Chemex coffee brewer.

Once you have gathered all the requirements, you can then follow these simple steps to brew the best coffee with a Chemex Coffee Maker:

1. Heat the Water

Fill your kettle with clean water and start heating up until it boils in 195 to 200 degrees. It will take a while for the water to boil, and so you can do other preparations.

2. Place Your Chemex Filters In the Chemex

Tri-fold the Chemex filters to achieve a funnel shape and put one of them in the Chemex. The three layers are thick enough to promote perfect brewing.

3. Grind the Coffee Beans

Measure the desired amount of your favorite freshly roasted coffee beans and grind them into a uniform medium grind using a burr coffee grinder.

As mentioned earlier, the best grind for Chemex coffee brewing should not be too fine or too coarse. It should be slightly finer than the French Press coffee grind.

However, it should still look like granules and not fine like sand. If you grind your coffee beans to a very coarse texture, it will under extract and will pour through too fast.

4. Rinse the Chemex

Rinse the Chemex with hot water to seal the filter and remove any paper flavor before pouring your ground coffee.

Rinsing the Chemex with hot water will also preheat the unit and get it ready for brewing.

Then dump the water out by turning the Chemex upside down. Ensure to hold the filters in place when pouring the water to drop them.

5. Start Brewing

To brew your coffee, pour the ground coffee in the filter and get a timer.

Start the timer, then take hot water and begin saturating the coffee beans. Freshly roasted coffee beans will produce a bloom as you pour water to remove the carbon Dioxide created during roasting.

Pause a bit after wetting all the ground beans and give it one minute to bloom.

The bloom is very important as it allows the CO2 to escape. If you don’t let your grounds bloom, the CO2 will make your coffee develop a sour taste.

Moreover, CO2 repels water, and it may affect the brewing process. Water will extract the coffee oils and aromatics easily when there is no CO2 interfering with the brewing process.

6. Add More Water

Add more water to brew your coffee and ensure that the water-coffee ratio is right. Generally, the ratio should be 1 gram of coffee to 15 grams of water.

If you used 35g of coffee, you would want to pour up to 525g of water, which is about two cups of water.

Be sure to pour the water slowly, but don’t go beyond five minutes to avoid brewing bitter coffee.

Some people also wonder if it’s possible to make iced coffee with a Chemex. The answer is yes, and you don’t have to wait overnight.

You brew coffee with hot water, but with ice in the flask to instantly cool the coffee.

7. Dispose of the Grounds and Serve Your Coffee

Once you have brewed the desired amount of coffee, dispose of the used grounds by removing the filter out of the Chemex.

Then replace the filter with a Chemex lid to keep the coffee hot as you serve it. Don’t use heat to keep your coffee hot, as it will develop an unpleasant flavor.

How to clean a Chemex?

Here is a simple, step-by-step guide on how to clean a Chemex:

  1. Rinse out leftover coffee grounds
  • After brewing, rinse the Chemex to remove all remaining coffee grounds.
  1. Wash with dish soap and water
  • Fill the Chemex with warm water and add a small amount of dish soap. Swirl gently to wash interior.
  1. Use brush to scrub all surfaces
  • Use a soft brush to gently scrub the glass interior and exterior. Get into the spout and corners.
  1. Rinse thoroughly
  • Rinse several times with clean water to remove all soap residue.
  1. Air dry upside down
  • Let the Chemex air dry completely upside down on a dish rack before next use. This prevents mold growth.

Following these simple steps after each use keeps your Chemex in great shape and ready for the next delicious brew!


Chemex Coffee Maker is also dishwasher safe, but with the wooden handle removed.

How to Make the Chemex Coffee Stronger

If you are one of the coffee fanatics who loves strong coffee, you must be wondering how to make the Chemex coffee stronger.

Luckily, it’s very easy to strengthen your Chemex coffee. All you have to do is adjust your coffee-water ratio.

The golden ratio for Chemex brewing is 35g of coffee for two cups of water or 55 grams of coffee for one liter of water.

To make stronger coffee, you can use 60 to 65 grams of coffee for one liter, depending on how strong you want your coffee to be.

For the grind, you can increase the fineness a little to boost the coffee’s strength.

Chemex Brewing Tips

  • If you found that the brewing time was way too long, you can coarsen the grind to steer clear of bitter coffee.
  • If the brew time was too short, it will result in sour coffee.  You can use a finer grind to solve this.
  • Always put the multi-layered side of the filter on the upper (pouring) side of the Chemex to keep the filter even as you pour hot water.
  • If your coffee is too bitter, it results from over-extraction. So, you will want to increase or coarsen the grind.
  • If you brewed too weak and sour coffee, it resulted from under-extraction. So, you need to reduce the grind size to achieve a finer texture.
  • Always use a burr grinder to grind coffee beans for Chemex brewing as it allows you to select the desired grinding level. It also slices the beans uniformly, instead of smashing them.

What is the Best Size Chemex? 

There are different sizes of Chemex makers to choose from out there. However, the right size that you should get depends on your needs and the budget.

A 6-cup or 8-cup sized Chemex coffee maker is most preferred because it can make a larger number of people and is also good for one person.


1. How to grind beans for chemex

Here are some tips for grinding coffee beans for optimal Chemex brewing:
– Use a burr grinder, not a blade grinder. Burr grinders produce more uniformly sized coffee grounds.

– Set the grinder to a medium-coarse setting. The grounds should be similar in size to coarse sand.

– Grind the beans fresh right before brewing. Freshly ground beans make for better flavor.

– Add the desired amount of whole beans and grind them all at once. Don’t overfill the grinder.

– Give the grinder 10-15 seconds to grind the beans at medium-coarse setting.

– Stir the ground coffee with a spoon or give it a shake to break up any clumps. Grounds should be loose, not compacted.

– Make sure all the grounds are a consistent size. No large chunks or fine powder.

– Store any unused grounds in an airtight container to preserve freshness.

Following these tips will help you achieve the ideal even, medium-coarse grind for great tasting Chemex coffee. Freshly grinding at the right size is key for proper extraction.

What Kind of Coffee Grind for Chemex?

The ideal coffee size grind for Chemex coffee should be (medium grind) less chunky. Unlike the French press, Chemex coffee makers have thicker filters.
Very fine grinds will be over-extracted by the Chemex filter, which will result in a bitter coffee.
The Chemex flow rate will allow the extraction of the best flavor with a medium grind

What Size Grind for Chemex?

Chemex coffee makers have thicker filters compared to most traditional coffee makers. These filters are meant to regulate the rate at which coffee will flow.

This allows the extraction of most coffee components. Coarse grounds will not allow full extraction while fine grind will be over-extracted. The best ground size for Chemex coffee should be medium grind

How Long to Grind Coffee for Chemex?

When brewing coffee using Chemex, it is essential to use the correct water coffee ratio. The best ratio for Chemex brewing is 1gm of coffee to 15gm of coffee.

 In this case, you can use 55 grams of coffee to brew three cups of coffee drink.

5. What is the best grind for chemex

The ideal grind size for Chemex brewing is a medium-coarse grind. This means the ground coffee particles should be about the size of coarse sand or kosher salt grains. A medium-coarse grind allows the water to flow through the coffee bed evenly and extract flavor optimally without causing overextraction.

Grinds that are too fine can lead to bitter, overextracted coffee, while grinds too coarse will result in weak flavor. For the best taste from a Chemex, use an even, medium-coarse grind to allow proper extraction and bring out the coffee’s full flavor profile.


Chemex Coffee Maker is a great way to change up your coffee routine. It can help you enjoy clean, non-bitter coffee.

I highly recommend it to any coffee enthusiast looking for an excellent tool that can brew the best cup of coffee.

When making coffee with a Chemex, the most important thing is to ensure that you have the right grind.

Always use a burr grinder when grinding coffee for Chemex to achieve a fine texture and uniformly-ground beans.

Regardless of the roast you have, Chemex brewing will give you a rich-tasting cup of coffee.

Similar Posts