How to Use a Chemex: Ratios, Grind and a Timed Pour Schedule

Welcome to “The Complete Guide to Using a Chemex Classic Series Pour-Over Glass Coffeemaker,” where you will discover the essential steps, techniques, and tips to improve your coffee brewing experience. This complete guide will walk you through each stage of using the Chemex, from selecting the right coffee beans to mastering the art of the perfect pour. Whether you are a novice or a seasoned coffee enthusiast, you will find valuable insights to help you achieve a consistently exceptional brew.

How to use a chemex, in short: To use a Chemex, set the filter with its thick side toward the spout, rinse it with hot water, add medium-coarse coffee at about 1 gram per 15 to 16 grams of water, and bloom it for 30 to 45 seconds. Then pour in slow circles and let the brew drain in about four minutes.

Table of Contents

The Complete Guide to Using a Chemex Classic Series Pour-Over Glass Coffeemaker

Introduction

Do you desire the perfect cup of coffee that transforms your morning routine into an indulgent experience? If so, you are not alone. Many coffee fans have discovered the rare brewing capabilities of the Chemex Classic Series Pour-Over Glass Coffeemaker. Designed with both elegance and functionality in mind, this coffee maker offers a unique blend of traditional and modern coffee brewing methods. This guide will introduce you to the Chemex, describe its components, and offer step-by-step instructions to ensure you get the most out of your coffee-brewing experience.

What is the Chemex Classic Series Pour-Over Glass Coffeemaker?

The History of Chemex

The Chemex Classic Series Pour-Over Glass Coffeemaker was invented in 1941 by Dr. Peter Schlumbohm. Combining science with art, Dr. Schlumbohm aimed to create a coffee maker that smoothly integrates functionality with an aesthetically pleasing design. For decades, the Chemex has remained a staple in the homes of coffee enthusiasts, known for its consistent brewing process and artistic design.

Why Choose Chemex?

Choosing a Chemex coffee maker comes down to its advantages over other brewing methods. It offers rare control over the brewing process, from the water temperature to the brewing time. Also, its unique design ensures that your coffee experiences minimal exposure to unwanted impurities, granting you a cleaner, richer flavor.

Components of the Chemex Classic Series

Understanding the components of your Chemex is key to mastering it. Familiarizing yourself with each part will make the brewing process smoother and improve your overall experience.

Component	Description
Glass Body	Made of non-porous borosilicate glass, it neither absorbs odors nor chemical residues.
Wooden Collar	Ergonomic design for comfortable handling; often tied with leather for added elegance.
Chemex Filters	Thick, specialty paper filters that ensure a clean and crisp coffee flavor.
Spout	An easy-pour spout design for smooth beverage transfer.

How to Brew the Perfect Cup with Your Chemex

To achieve that perfect cup of coffee, you need to follow a structured process. Each step contributes to the overall flavor and aroma of your beverage. Let’s break down the brewing process into manageable steps.

Step 1: Gather Your Supplies

Before you start brewing, ensure you have the following supplies:

Chemex Classic Series Pour-Over Glass Coffeemaker
Chemex paper filters
Freshly ground coffee (medium-coarse grind)
Clean, filtered water
A gooseneck kettle
A digital scale (optional)
A timer (optional)

Having everything prepared ahead of time will simplify your brewing process.

Step 2: Measure Your Coffee and Water

The ratio of coffee to water is critical for achieving the perfect flavor. The recommended ratio for a Chemex is 1:15, meaning one gram of coffee for every 15 grams of water. For a 6-cup Chemex, that means about 42 grams of coffee and 630 grams of water.

Coffee (grams)	Water (grams)
21	315
42	630
60	900

Step 3: Rinse the Filter

Place the Chemex filter inside the glass body, making sure that the triple-fold side of the filter is aligned with the spout. Rinse the filter with hot water to remove any potential paper taste and to preheat the Chemex. After rinsing, discard the water through the spout.

Step 4: Add Coffee Grounds

Add your measured coffee grounds to the pre-wetted filter, ensuring they are evenly spread. This is key for even extraction and a balanced flavor profile.

Step 5: Bloom the Coffee

Begin by pouring enough hot water (approximately 200°F or 93°C) to saturate all the coffee grounds. This initial pour, known as the “bloom,” releases carbon dioxide from the coffee. Let it bloom for about 30 seconds.

Step 6: Continue Pouring

After the bloom, continue pouring water in a slow, circular motion until you reach your desired water-to-coffee ratio. Make sure you pour steadily and avoid breaking the circular motion to ensure an even extraction.

Step 7: Let It Drip

Allow the water to drip through the coffee grounds and the filter into the Chemex’s glass body. This usually takes around 3 to 4 minutes, depending on the grind size and your pouring technique.

Step 8: Enjoy Your Coffee

Once all the water has passed through the grounds, remove the filter and discard it. Pour your freshly brewed coffee into your favorite mug and enjoy.

Tips for Optimal Brewing

Achieving the perfect cup of coffee takes practice and patience. Here are some tips to help you improve your brewing technique:

Use Freshly Roasted Coffee

Coffee tastes freshest within two weeks of roasting. It’s recommended that you buy your beans whole and grind them just before brewing to ensure maximum freshness.

Maintain Water Temperature

The recommended water temperature for Chemex brewing is between 195°F and 205°F (90°C to 96°C). Using a thermometer or a temperature-controlled kettle can help you maintain this range.

Experiment with Grind Sizes

Adjusting the grind size of your coffee can significantly affect the flavor. A medium-coarse grind is usually ideal for Chemex, but feel free to experiment to find what works best for you.

Preheat Your Chemex

Always preheat your Chemex by rinsing the filter with hot water before adding the coffee grounds. This step helps in maintaining the brewing temperature, which is key for proper extraction.

Consistent Pouring Technique

Maintaining a consistent pouring technique will ensure even saturation of the coffee grounds, leading to a balanced flavor profile. Aim for a slow, circular pour and avoid stopping midway.

Troubleshooting Common Issues

Even seasoned baristas encounter occasional issues when brewing coffee. Let’s address some common problems and solutions.

Bitter Coffee

If your coffee tastes bitter, it might be over-extracted. This can be due to too fine a grind size or too long a brewing time. Try coarser grounds or a faster pour.

Sour Coffee

Sour tasting coffee often results from under-extraction. This usually means the grind size is too coarse or the water temperature is too low. Adjusting these variables can help balance the flavors.

Weak Coffee

Weak coffee often means that the coffee-to-water ratio is off. Ensure you are using enough coffee grounds for the amount of water you are pouring.

Slow Drip Time

If your coffee takes too long to drip, it can be due to too fine a grind size or a clogged filter. Try a coarser grind or make sure the filter is positioned correctly.

Chemex Classic Series Sizes and Prices

The Classic Series comes in four sizes. Chemex counts a cup as 5 fluid ounces, so the size on the box is smaller than the mugs in most kitchens. These are the prices on the official Chemex store in September 2026.

Model	Price	Who it suits
Three Cup Classic	$44.15	One person, one big mug
Six Cup Classic	$49.50	The everyday size for one to three mugs
Eight Cup Classic	$51.50	Weekend brunch for four
Ten Cup Classic	$53.50	Large households and guests

The Six Cup is the one to buy if you are unsure. It brews a single mug without trouble and still handles a pot for guests. The spread between sizes is only a few dollars, so pick by how much coffee you brew at once, not by price.

Chemex Recipe Chart by Batch Size

A 1:15 ratio gives a fuller cup and 1:16 gives a lighter, clearer one. Weigh both coffee and water on a scale, since a Chemex scoop of grounds can vary by several grams. Our guide to the pour over coffee ratio explains how to adjust from here.

Batch	Coffee	Water at 1:15	Water at 1:16
One mug	20 g	300 g	320 g
Two mugs	30 g	450 g	480 g
Three mugs	40 g	600 g	640 g
Six Cup, nearly full	50 g	750 g	800 g

A Timed Pour Schedule for 40 Grams of Coffee

This schedule makes about three mugs at 1:15. Start the timer the moment water first hits the grounds.

0:00: pour 80 g of water, enough to wet every ground, and give the Chemex a gentle swirl.
0:45: pour in slow circles up to 250 g, keeping the stream off the filter paper.
1:30: pour up to 430 g once the level has dropped about halfway.
2:15: pour the last of the water up to 600 g.
About 4:00 to 4:30: the bed should finish draining. Much longer means the grind is too fine, and much shorter means it is too coarse.

A gooseneck kettle makes the slow circles far easier than a standard spout. Our best gooseneck kettle picks cover temperature control and pour speed.

Keeping the Chemex Clean

Untie the wood collar before washing. Soaking the wood and tie can warp or stain them.
Rinse right after brewing. Coffee oils leave a brown film inside the glass if they dry overnight.
Use a long bottle brush. The narrow waist stops most hands and sponges from reaching the bottom.
Soak away old stains. Hot water with a spoonful of baking soda loosens film that a quick rinse missed.

How to use a chemex: FAQ

What grind size is best for a Chemex?

A medium-coarse grind, about the texture of kosher salt, works best for a Chemex. The thick paper filter slows the flow, so a grind that is too fine can stall the drain and turn the cup bitter.

How much coffee do you use in a 6 cup Chemex?

Use about 40 to 50 grams of coffee for a full 6 cup Chemex, with 600 to 800 grams of water depending on the ratio. For a single mug, 20 grams of coffee and 300 to 320 grams of water is a good start.

Can you use regular paper filters in a Chemex?

You can in a pinch, but Chemex bonded filters work better because they are thicker and shaped to fit the cone. Thinner flat-bottom filters let more oils through and can collapse against the glass, which blocks airflow and slows the drain. More brewing guides live on the Coffee Rank IQ homepage.

Conclusion

The Chemex Classic Series Pour-Over Glass Coffeemaker is a timeless piece of brewing equipment that promises a flavorful and aromatic coffee experience. By mastering the detailed steps outlined in this guide, you will be well on your way to brewing the perfect cup every time. Keep in mind, the key to a great brew lies in quality ingredients, precise measurements, and consistent techniques. So take your time, experiment, and enjoy the routine to coffee perfection.

Whether you are a seasoned barista or a curious newcomer, the Chemex offers a versatile and rewarding brewing experience that can improve your coffee rituals. Now, equipped with this complete guide, you are ready to look at Chemex brewing. Happy brewing!