Perfect Chemex Coffee: How Many Grams?

Matty Victor

If you’re a coffee enthusiast looking for a wonderfully smooth and aromatic brew, then Chemex might be the perfect brewing method for you. But figuring out the right amount of coffee to use can be a bit confusing. Don’t worry, we’ve got you covered! In this article, we will be discussing the ideal grams of coffee to use in a Chemex, making it super easy for you to enjoy a delightful cup of coffee every single time. So, grab your favorite Chemex brewer and get ready to elevate your coffee game to a whole new level!

How Many Grams of Coffee for Chemex?

Welcome to this comprehensive guide on how many grams of coffee to use for a Chemex. If you are a coffee enthusiast and enjoy brewing your own coffee at home,
the Chemex is a fantastic choice. The Chemex brewing method allows you to extract a clean and flavorful cup of coffee, and finding the right amount of coffee grounds
is essential to achieving the perfect brew. In this article, we will explore the recommended coffee-to-water ratio, how to measure the coffee grounds accurately,
and tips for achieving the best results with your Chemex.

What is a Chemex?

A Chemex is a unique pour-over coffee brewing device invented by Dr. Peter Schlumbohm in 1941. It features an hourglass-shaped glass flask, a wooden collar,
and a leather tie. The Chemex uses a thick filter to produce a clean cup of coffee with minimal sediment. Its elegant design and functionality have made it a popular
choice among coffee enthusiasts worldwide.

Why Accuracy in Coffee Grounds Matters?

Accurate measurement of coffee grounds is crucial for achieving consistency and desired flavor profiles in your brewed coffee. Using the right amount of coffee
grounds ensures proper extraction and prevents over or under extraction. The Chemex brewing method has specific recommendations for the coffee-to-water ratio,
and following these guidelines will give you the best results.

How Many Grams of Coffee for Chemex?

Now, let’s dive into the recommended grams of coffee for a Chemex. The general guideline is to use a coffee-to-water ratio of 1:15 to 1:17. This means that for every
gram of coffee, you should use 15 to 17 grams of water. However, personal preference plays a role, and you can adjust the ratio to suit your taste. To simplify things,
we will provide a step-by-step guide on how to measure the coffee grounds accurately.

Step 1: Determine your Brew Size

The first step is to determine the quantity of coffee you want to brew. The Chemex comes in various sizes, ranging from 3 to 10 cups. Each cup refers to a 5-ounce
measuring cup. So, a 6-cup Chemex can hold 30 ounces of water.

Step 2: Use the Coffee-to-Water Ratio

For every gram of coffee, use 15 to 17 grams of water. Let’s say you want to brew a full 6-cup Chemex. You’ll need approximately 42 grams of coffee for a standard
1:15 ratio or around 47 grams for a 1:17 ratio. Remember, the choice of ratio depends on your preference.

Step 3: Measure the Coffee Grounds

Using a digital scale, measure the desired amount of coffee grounds. Place your Chemex on the scale, tare it to zero, and then slowly pour the coffee into the
filter. The scale will display the total weight, allowing you to achieve precise measurements.

Step 4: Begin Brewing

With your coffee grounds measured and placed in the filter, you are now ready to start the brewing process. Follow the standard Chemex brewing instructions,
which involve pre-wetting the filter, pouring water in a circular motion, and allowing the coffee to drip into the Chemex flask.

Tips for Brewing with a Chemex

Brewing coffee with a Chemex can be a delightful experience, and here are some tips to enhance your brewing process:

  1. Use freshly roasted whole beans and grind them just before brewing to retain optimal flavor.
  2. Pre-wet the filter to remove any paper flavors before adding the coffee grounds.
  3. Pour the water slowly and in a circular motion to ensure even extraction.
  4. Experiment with different coffee beans and roast levels to find your preferred flavor profiles.
  5. Clean your Chemex thoroughly after each use to prevent any residue build-up.

Difference Between Chemex and Other Brewing Methods

While there are several brewing methods available, the Chemex stands out due to its unique features and functionality. Here are some differences between the Chemex
and other popular brewing methods:

Chemex French Press Pour-over
Uses thick paper filters Uses a metal mesh filter Uses paper or metal filters
Produces a clean cup with minimal sediment Produces a full-bodied cup with more oils and sediment Produces a clean cup with varying levels of clarity
Requires specific coffee-to-water ratio Allows for more flexibility in ratio Allows for more flexibility in ratio


Choosing the right amount of coffee grounds for your Chemex is an essential step in brewing a delicious cup of coffee. By following the recommended coffee-to-water
ratio and employing accurate measurements, you can consistently achieve the desired flavors. Don’t forget to experiment with different ratios and brewing techniques
to find the perfect balance for your taste buds. Enjoy the process and savor the rich coffee experience that the Chemex delivers!

FAQs (Frequently Asked Questions)

Question 1: How many grams of coffee should I use in a Chemex?

In order to achieve the best flavor and extraction, it is recommended to use a coffee-to-water ratio of 1:15 to 1:17 when brewing coffee with a Chemex. This means for every 1 gram of coffee, you should use 15 to 17 grams of water. Therefore, if you have a 500 ml (or grams) Chemex, you should use approximately 29 to 33 grams of coffee grounds.

Question 2: Can I adjust the coffee-to-water ratio based on my preference?

Absolutely! The recommended coffee-to-water ratio is just a starting point. You can adjust it according to your personal taste preferences. If you like a stronger cup of coffee, you can increase the amount of coffee grounds, and if you prefer a milder taste, you can decrease the amount of coffee grounds accordingly. Experimentation is the key to finding your perfect balance.

Question 3: Should I use a particular grind size for Chemex brewing?

Yes, the grind size is crucial when brewing coffee with a Chemex. The ideal grind size for a Chemex is similar to coarse sea salt or slightly coarser than table salt. It should have a consistency that is coarser than that for espresso but finer than what you would use for French press. Using the correct grind size allows for optimal extraction and prevents the coffee from becoming too bitter or weak.

Question 4: How long should I let the coffee brew in a Chemex?

The total brew time for a Chemex typically ranges between 4 and 5 minutes. It is recommended to pour the hot water in a slow and controlled manner to evenly saturate the coffee grounds. Once the coffee has finished dripping through the filter, it is ready to be enjoyed. Over-extracting or leaving the coffee to brew for too long can result in an over-extracted, bitter taste.

Question 5: Can I reuse the Chemex filter?

Chemex filters are designed for single-use only and are not made to be reused. The filters are thick and remove the majority of the oils and fines, resulting in a clean cup of coffee. Reusing the filter can lead to clogging, poor extraction, and a less desirable coffee experience. It is recommended to use a fresh filter for each brewing session to ensure the best results.

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Matty Victor

An expert in tasting the nuances of coffee. often talks about the different flavors of coffee from different regions of the world "The taste of coffee is an endless journey."


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