How do you calculate the pour-over coffee grounds-to-water ratio?

The coffee-to-water ratio is the foundational parameter for pour-over. It sets how much soluble material water can pull from the grounds, and pulse pouring controls when that extraction happens. A three-pour workflow gives beginners a stable, repeatable sequence: wet the bed, then add the remaining water in timed stages, keeping the coffee bed even throughout.

Equipment matters too: a pour-over kettle, dripper and filter paper, server, grinder, scale for water and time, and a thermometer. From bean selection to final extraction, each step shifts flavor. Understanding terms like what is coffee sugar helps when reading recipes, and the same framework applies whether brewing at home or ordering street coffee.

The flavor of pour-over coffee depends on every detail from bean selection to extraction, and the coffee-to-water ratio is one of the most critical foundational parameters. This article will systematically explain the calculation logic behind the coffee-to-water ratio, the principles of pulse pouring, and a three-pour pour-over workflow suitable for beginners. At the same time, drawing on Front Street Coffee's brewing experience, from equipment preparation and coffee bean selection to the specific allocation of water in each pour, we will break down the complete steps of a delicious pour-over cup, helping you build a stable and reproducible brewing framework.

Do you all still remember the scene when you first encountered pour-over coffee? Front Street's starting point was walking into a café one day and seeing a barista holding a kettle, pouring water in circles over the coffee grounds in the dripper, and finally getting a cup of aromatic black coffee. At that moment it felt truly wonderful, and from then on I developed a strong interest in pour-over coffee.

What exactly does pour-over coffee mean?

During high-temperature roasting, coffee beans undergo a series of chemical reactions that produce rich aromatic compounds, and the essence of brewing is using water and equipment to release these aromatic substances. The pour-over method is to first grind coffee beans into grounds, then pour hot water onto the coffee bed to "dissolve" the soluble substances in the coffee. Simply put, it uses a dripper together with filter paper or another filtering medium to trap the coffee grounds and keep them from falling into the server, thereby obtaining a clean and translucent cup of black coffee.

From choosing coffee beans to the final extraction, every step affects the flavor of pour-over coffee to varying degrees. Therefore, if you want to brew a cup of pour-over coffee, based on Front Street's brewing experience, in addition to high-quality coffee beans, Front Street believes you need to prepare at least the following equipment: a pour-over kettle for pouring water, a dripper and filter paper to trap coffee grounds, a server to catch the coffee liquid, a grinder to grind coffee beans, a scale that can record the amount of water and time, and a thermometer to measure water temperature.

A good cup of coffee naturally cannot do without good raw materials—high-quality coffee beans. Front Street recommends choosing coffee beans that are 4 to 30 days after the roast date and within their optimal flavor period. This stage is more conducive to stable extraction, and the pour-over flavor is also fuller. To ensure the freshness of the coffee beans, the beans shipped by Front Street are all freshly roasted within 5 days, and generally can be delivered in 1 to 3 days, so the coffee beans you receive are basically still within the optimal flavor period and you can start studying extraction right away.

What is the pour-over coffee-to-water ratio? And how should it be calculated?

The coffee-to-water ratio refers to the ratio between coffee grounds and the total amount of water poured, and it directly determines the strength of the coffee. Regardless of which brewing method is used, Front Street always determines the coffee-to-water ratio before extraction. For example, Front Street's store output usually uses 15 grams of coffee grounds for a single cup and a 1:15 coffee-to-water ratio, which means a total of 225 milliliters of hot water needs to be poured.

With other parameters held constant, the more water poured, the lower the coffee strength and the more dispersed the taste; the less water poured, the higher the strength and the more concentrated and heavy the flavor. In addition, increasing the amount of water also raises the coffee's extraction yield, allowing more soluble substances to enter the cup. (Extraction yield refers to the proportion of soluble substances released from the coffee relative to the weight of the coffee grounds.) But the more water poured later, the extraction efficiency gradually decreases, and undesirable bitter substances are also released, affecting the final taste. So we need to find a suitable coffee-to-water ratio to balance the ideal strength and extraction yield.

Why do we pour water in stages?

Usually we notice that when brewing pour-over coffee, the barista pauses midway while pouring, waits for the water level to drop, and then continues adding water. This is staged extraction.

In the first stage, a small amount of hot water is poured to wet the coffee grounds, with the purpose of releasing the gas inside the coffee bed and preventing it from interfering with subsequent extraction. This step is called "blooming." The most common blooming method is to pour water equal to twice the weight of the coffee grounds and let it bloom for 30 seconds. For example, if Front Street uses 15 grams of coffee grounds, it uses 30 milliliters of water to bloom, and this is also the easiest "blooming formula" for beginners to master. The number of stages in staged pouring is counted after the blooming stage, based on whether there is a pause in pouring. For example, if the pouring after blooming is divided into two stages, then together with the bloom it is a "three-stage pour," and so on; if the pouring after blooming is completed in one go without pause, it is called a "one-pour flow."

The reason baristas use staged extraction is that during the pour-over process, different substances in the coffee extract at different rates, and the order in which flavors are released by high-temperature hot water is acidity, sweetness, then bitterness. In staged pouring extraction, apart from the blooming stage, under the same coffee-to-water ratio, the more stages there are, the less water is poured in each stage, the more times the coffee bed is washed and agitated, and the extraction yield also increases accordingly.

In addition, increasing the number of stages extends the total extraction time, more coffee substances are released at each stage, and the flavor layers become richer. But Front Street wants to remind everyone: the more stages there are, the longer the operation time, and the risk of over-extraction also increases. Large-molecule substances in the later stage of coffee are more easily released, and instead the sweetness is masked. It can be seen that more pouring stages is not necessarily better. So how should staged pouring be calculated?

The universal three-stage pour-over method

Based on past brewing experience, Front Street recommends that beginners just starting out use the three-stage pouring method. Three-stage extraction helps more fully dissolve flavor substances during extraction, increases mouthfeel layers, and at the same time avoids excessive extraction caused by too long a steeping time.

If using 15 grams of coffee grounds, a 1:15 coffee-to-water ratio, and 225 milliliters of total water, the three stages of water are: 30 milliliters, 95 milliliters, and 100 milliliters, and the weights shown on the scale are: 30 grams, 125 grams, and 225 grams.

Here Front Street selects its own roasted washed Yirgacheffe Gedeb Cooperative coffee beans, paired with a Hario V60 dripper for brewing. The V60's spiral rib design allows the coffee grounds to degas better and maximizes the activation of the volatilization and dissolution of aromatic acidic substances. Because Yirgacheffe is a light roast, the coffee beans are harder in texture and require high-temperature hot water of 92°C to 93°C to bring out the floral and fruity notes in the coffee.

In terms of grind size, Front Street recommends a medium-fine grind (78% passing through a Chinese standard No. 20 sieve), with a coarseness close to fine granulated sugar. If the grind is too coarse, it cannot extract rich, mellow flavor substances, and the brewed coffee will taste thin; if the particles are too fine, it is easy to over-extract at high water temperature, and the brewed coffee is prone to bitterness.

In terms of brewing ratio, Front Street believes that 1:15 to 1:16 are both acceptable. If you want a richer mouthfeel, use 1:15; if you want to more clearly perceive the floral and sweet notes, you can use 1:16 to let the flavor unfold more.

First place the folded filter paper into the dripper and fit it snugly, pour 15 grams of ground coffee into the dripper, and tare the scale to zero.

In the first stage, pour 30 grams of water to bloom for 30 seconds. Start timing as you pour, using a small stream throughout, pouring from the center point and circling outward, making sure to wet the entire coffee bed.

After 30 seconds, switch to a slightly larger stream and steadily pour the second stage of 95 grams of water, with the purpose of lifting the entire coffee bed. The water column should be poured vertically and evenly. At this point the timer scale shows 125 grams, and the pour is finished in about 55 seconds.

When the liquid level drops to the halfway point, begin using a small stream to pour the third stage of 100 grams in a small circle. Try to control the stream so it does not circle too widely, otherwise it is easy to scatter the coffee bed and cause under-extraction. The final total amount of water poured is 225 grams, and the drip filtration is completed in about 2 minutes. After removing the dripper, shake the coffee liquid in the server to even it out and you can begin tasting.

The amount of water poured in each stage is not fixed and unchanging. We can flexibly adjust it based on our accumulated pour-over experience and our understanding of the coffee beans. Front Street believes that there are thousands of ways to brew a delicious cup of coffee. As long as we learn and practice more, it is not difficult to easily master the various parameters of pour-over coffee.

For professional coffee knowledge exchange and more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style).

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The above content is compiled by CoffeeHunters, a coffee news website.