How to Use a Chemex: Step-by-Step Brewing Guide

Chemex Brewing Guide starts with one goal: brewing a clean, balanced cup. Fresh beans and proper technique deliver the best results.

This Chemex Brewing Guide covers grind size, brew ratios, water temperature, pouring technique, and simple troubleshooting.

Learn more about brewing standards from the Specialty Coffee Association (SCA).

What You Need

Chemex Brewing Guide begins with the right equipment. Gather a Chemex brewer, paper filters, fresh beans, a burr grinder, a gooseneck kettle, a scale, and a timer.

Fresh roasted beans make the biggest difference. Choose beans roasted within the past 7 to 21 days for the best flavor. Browse the premium coffee collection for fresh options.

The Chemex Recipe

Use a 1:16 coffee-to-water ratio. Brew 40 grams of coffee with 640 grams of water for a standard 6-cup Chemex.

Grind to a medium-coarse consistency, similar to coarse sea salt. Use water between 195°F and 205°F.

Target a total brew time of 4 to 5 minutes.

Step 1: Prepare the Filter

Chemex Brewing Guide starts by placing the paper filter into the brewer. Position the three-layer side toward the spout.

Rinse the filter with hot water. This removes the paper taste and warms the Chemex. Discard the rinse water before adding coffee.

Learn more in our paper coffee filters article and perfect pour-over cup guide.

Step 2: Add Coffee

Chemex Brewing Guide recommends a medium-coarse grind. Add the coffee to the rinsed filter and gently level the grounds.

An even coffee bed helps the water extract evenly for a balanced cup.

Place the Chemex on your scale and tare it to zero before brewing.

Step 3: Bloom the Coffee

Chemex Brewing Guide begins with a proper bloom. Pour twice the coffee weight in water and wet all the grounds evenly.

Let the coffee bloom for 30 to 45 seconds. Fresh beans produce a stronger bloom.

Step 4: The Main Pour

Pour water slowly in steady circles. Keep the water level consistent without overflowing the filter.

Pour continuously or in stages. Finish your target water weight by about 3 to 3½ minutes.

Keep the water inside the coffee bed instead of pouring onto the filter walls.

Step 5: Let It Drain

Allow the coffee to drain completely. Total brew time should finish between 4 and 5 minutes.

Remove the filter and discard the used grounds.

Step 6: Serve and Taste

Swirl the brewed coffee before serving to balance the flavor.

A well-brewed Chemex coffee tastes clean, bright, and balanced. Expect clear tasting notes.

Troubleshooting Your Chemex Brew

Bitter coffee: Grind coarser. A brew longer than 5½ minutes usually indicates over-extraction.

Sour coffee: Grind finer. A brew under 3½ minutes usually extracts too quickly.

Flat flavor: Use beans roasted within the past 7 to 21 days. Browse our premium coffee collection.

Slow drawdown: Position the filter with the three-layer side facing the spout.

Weak coffee: Increase the coffee dose by 2 to 3 grams.

Best Coffee for Chemex Brewing

Chemex filters produce a clean cup with bright, well-defined flavors. Light and medium roasts perform especially well.

Single-origin coffees highlight fruit, floral, and citrus notes. Dark roasts brew a lighter, cleaner cup than a French press.

Browse the premium coffee collection. Learn more in our coffee roast levels guide.

Chemex vs. Other Pour-Over Methods

Chemex uses thicker filters than most pour-over brewers. They remove more oils for a cleaner cup.

The built-in glass carafe brews and serves coffee in one piece.

Compare brewers in our pour-over brewer comparison.

Caring for Your Chemex

Rinse your Chemex with hot water after every use. Wash it weekly with mild dish soap and a bottle brush.

Avoid sudden temperature changes. Store the brewer without a damp filter to prevent mold.

Keep fresh beans on hand with the Coffee Club. Save more with our bulk coffee collection.

Browse our flavored coffee collection, single serve coffee pods, or instant coffee for added convenience.

Frequently Asked Questions About Chemex Brewing

Use a medium-coarse grind, similar to coarse sea salt. Adjust finer if the brew tastes sour or coarser if it tastes bitter.

Start with a 1:16 ratio. Use 40 grams of coffee and 640 grams of water for a 6-cup Chemex.

A complete brew should take 4 to 5 minutes. Shorter or longer brew times usually indicate the grind needs adjustment.

Bitter coffee usually means the grind is too fine or the brew time is too long. Grind coarser and brew again.

No. A gooseneck kettle improves pouring control, but a standard kettle also works with careful pouring.

Brew a Cleaner Cup with Fresh Beans

Fresh beans make the biggest difference in a Chemex. Browse our premium coffee collection, roasted fresh and shipped within 48 hours.

Stay stocked with the Blackout Coffee Club. Fresh beans arrive on your schedule.

Learn more about how Blackout sources and roasts every bag.

Follow Blackout Coffee on Instagram and Facebook for brewing tips, coffee news, and new product releases.