How Many Grams of Coffee per Cup: Chemex Brewing Guide

I love starting my day with a cup of freshly brewed coffee. It’s the perfect way to wake up and get ready for the day ahead. But figuring out how many grams of coffee to use per cup can sometimes be a bit confusing. Luckily, I discovered the Chemex brewing method, which not only makes a delicious cup of coffee but also provides a simple guideline on the ideal coffee-to-water ratio. In this article, I will explain the Chemex brewing guide and help you understand how many grams of coffee per cup you should use.

Understanding the Chemex Brewing Method

The Chemex brewing method is a pour-over coffee brewing technique that uses a special glass coffee maker called a Chemex. The Chemex is designed to remove any bitterness or sediment from the coffee, resulting in a smooth and clean cup of joe. It consists of an hourglass-shaped glass vessel with a wooden collar and leather tie, creating a stylish and timeless look.

The Importance of Coffee-to-Water Ratio

Before diving into the specific measurements, it’s essential to understand the significance of the coffee-to-water ratio. The ratio determines the strength and flavor of your coffee. If you use too little coffee, the resulting cup will be weak, while using too much coffee will make it overpowering. Finding the perfect balance is key to achieving a delicious cup of coffee.

How Many Grams of Coffee per Cup?

Now let’s get to the core of the matter: how many grams of coffee should you use per cup when brewing with the Chemex? The general rule of thumb is 1 gram of coffee per 15-18 grams of water. This ratio will provide you with a medium-strength cup of coffee. However, taste preferences can vary, so feel free to adjust the ratio according to your personal preference.

The Chemex Brewing Guide

To make it even easier, I will break down the Chemex brewing process step by step:

1. Boil your water: Start by boiling an adequate amount of water. It’s crucial to use fresh and high-quality water, as it directly affects the taste of your coffee.

2. Prepare your Chemex: Place a Chemex paper filter into the top of the Chemex brewer, ensuring that the thick side is against the spout. Pre-rinsing the filter with hot water will remove any paper taste.

3. Weigh and grind your coffee: Weigh out the desired amount of coffee beans using a scale. For a standard 8-ounce cup, aim for about 25 grams of coffee. Grind the beans to a medium-coarse consistency, similar to sea salt.

4. Add coffee to the filter: Pour the ground coffee into the filter, ensuring the bed is evenly spread out. Shake the Chemex gently to level the coffee bed.

5. Bloom the coffee: Start your timer and pour a small amount of hot water, about twice the weight of the coffee (for example, 50 grams of water for 25 grams of coffee). Allow the coffee to bloom for about 30 seconds, ensuring all the coffee grounds are wet.

6. Pour the rest of the water: After the bloom, slowly pour the remaining hot water in a circular motion over the coffee bed. Aim to pour the water in multiple small increments, allowing the coffee to steep evenly.

7. Let it drip: Once you’ve poured all the water, wait for the water to drip completely through the filter before removing it from the Chemex. This may take around 4-5 minutes, depending on the size of your brew.

8. Enjoy your coffee: Finally, give your brewed coffee a gentle stir to ensure an even flavor distribution. Pour it into your favorite mug, sit back, and savor the delightful taste and aroma.

Experimenting with Different Ratios

While the recommended ratio of 1 gram of coffee per 15-18 grams of water is a good starting point, it’s essential to remember that coffee brewing is a personal journey. You can experiment with different ratios to find your perfect cup of coffee. If you prefer a stronger brew, increase the coffee-to-water ratio by using slightly more coffee. On the other hand, if you prefer a milder cup, decrease the amount of coffee used.


In conclusion, the Chemex brewing method offers a reliable and straightforward approach to brewing coffee. By following the Chemex brewing guide and using the recommended coffee-to-water ratio of 1 gram of coffee per 15-18 grams of water, you can enjoy a delicious cup of coffee every time. Remember to enjoy the process, experiment with different ratios, and find the perfect balance that suits your taste buds. So, grab your Chemex, weigh your coffee, and let the brewing begin!

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